History of malaria

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U.S. Public Health Service
, 1941–45

The history of malaria extends from its prehistoric origin as a

mosquitoes
which transmit the parasites.

References to its unique, periodic fevers are found throughout recorded history, beginning in the first millennium BC in Greece and China.[2][3]

For thousands of years, traditional

DDT, swamp drainage, covering or oiling the surface of open water sources, indoor residual spraying, and use of insecticide treated nets was initiated. Prophylactic quinine was prescribed in malaria endemic areas, and new therapeutic drugs, including chloroquine and artemisinins, were used to resist the scourge. Today, artemisinin is present in every remedy applied in the treatment of malaria. After introducing artemisinin as a cure administered together with other remedies, malaria mortality in Africa decreased by half, though it later partially rebounded.[5]

Malaria researchers have won multiple Nobel Prizes for their achievements, although the disease continues to afflict some 200 million patients each year, killing more than 600,000.

Malaria was the most important health hazard encountered by U.S. troops in the South Pacific during World War II, where about 500,000 men were infected.[6] According to Joseph Patrick Byrne, "Sixty thousand American soldiers died of malaria during the African and South Pacific campaigns."[7]

At the close of the 20th century, malaria remained endemic in more than 100 countries throughout the tropical and subtropical zones, including large areas of Central and South America, Hispaniola (Haiti and the Dominican Republic), Africa, the Middle East, the Indian subcontinent, Southeast Asia, and Oceania. Resistance of Plasmodium to anti-malaria drugs, as well as resistance of mosquitos to insecticides and the discovery of zoonotic species of the parasite have complicated control measures.

One estimate, which has been published in a 2002 Nature article, claims that malaria may have killed 50-60 billion people throughout history, or about half of all humans that have ever lived.[8] However, speaking on the BBC podcast More or Less, Emeritus Professor of Medical Statistics at Liverpool School of Tropical Medicine Brian Faragher voiced doubt about this estimate, noting that the Nature article in question did not reference the claim.[9][10] Faragher gave a tentative estimate of about 4-5% of deaths being caused by malaria, lower than the claimed 50%.[9] More or Less were unable to find any source for the original figure aside from works which made the claim without reference.[10]

Origin and prehistoric period

See also:
Plasmodium species infecting primates
The mosquito and the fly in this Baltic amber necklace are between 40 and 60 million years old.

The first evidence of malaria parasites was found in

macaque monkeys.[17] While P. malariae is highly host specific to humans, there is some evidence that low level non-symptomatic infection persists among wild chimpanzees.[18]

About 10,000 years ago, malaria started having a major impact on human survival, coinciding with the start of agriculture in the

Mediterranean world by the time of the Roman Empire, about 2000 years ago.[20]

Molecular methods have confirmed the high prevalence of

Cleopatra VII, the last Pharaoh of Ancient Egypt, similarly slept under a mosquito net.[23] However, whether the mosquito nets were used for the purpose of malaria prevention, or for more mundane purpose of avoiding the discomfort of mosquito bites, is unknown. The presence of malaria in Egypt from circa 800 BC onwards has been confirmed using DNA-based methods.[24]

Classical period

Malaria became widely recognized in

fevers with climatic and environmental conditions and classified the fever according to periodicity: Gk.:tritaios pyretos / L.:febris tertiana (fever every third day), and Gk.:tetartaios pyretos / L.:febris quartana (fever every fourth day).[25][26]

The Chinese

spleens and a tendency to epidemic occurrence.[27]
Around 168 BC, the herbal remedy Qing-hao (
Wushi'er bingfang translated as "Recipes for 52 kinds of diseases" unearthed from the Mawangdui).[28]
Qing-hao was first recommended for acute intermittent fever episodes by
artemisia herb in cold water, wring them out, and ingest the expressed bitter juice in their raw state.[30][31]

"Roman fever" refers to a particularly deadly strain of

De Materia Medica have been suggested to have been a response to chronic malaria in the Roman empire.[34] Some so-called "vampire burials" in late antiquity may have been performed in response to malaria epidemics. For example, some children who died of malaria were buried in the necropolis at Lugnano in Teverina using rituals meant to prevent them from returning from the dead. Modern scholars hypothesize that communities feared that the dead would return and spread disease.[35]

In 835, the celebration of

Hallowmas (All Saints Day) was moved from May to November at the behest of Pope Gregory IV, on the "practical grounds that Rome in summer could not accommodate the great number of pilgrims who flocked to it", and perhaps because of public health considerations regarding Roman Fever, which claimed a number of lives of pilgrims during the sultry summers of the region.[36]

Cinchona tree by Theodor Zwinger, 1696

Middle Ages

During the Middle Ages, treatments for malaria (and other diseases) included blood-letting, inducing vomiting, limb amputations, and trepanning. Physicians and surgeons in the period used herbal medicines like belladonna to bring about pain relief in affected patients.[37][38]

European Renaissance

The name malaria is derived from mal aria ('bad air' in Medieval Italian). This idea came from the Ancient Romans, who thought that this disease came from pestilential fumes in the swamps. The word malaria has its roots in the miasma theory, as described by historian and chancellor of Florence Leonardo Bruni in his Historiarum Florentini populi libri XII, which was the first major example of Renaissance historical writing:[39]

Avuto i Fiorentini questo fortissimo castello e fornitolo di buone guardie, consigliavano fra loro medesimi fosse da fare. Erano alcuni a' quali pareva sommamente utile e necessario a ridurre lo esercito, e massimamente essendo affaticato per la infermità e per la mala ariae per lungo e difficile campeggiare nel tempo dell'autunno e in luoghi infermi, e vedendo ancora ch'egli era diminuito assai per la licenza conceduta a molti pel capitano di potersi partire: perocchè, nel tempo che eglino erano stati lungamente a quello assedio, molti, o per disagio del campo o per paura d'infermità, avevano domandato e ottenuto licenza da lui (Acciajuoli 1476).

After the Florentines had conquered this stronghold, after putting good guardians on it they were discussing among themselves how to proceed. For some of them it appeared most useful and necessary to reduce the army, more so as it was extremely stressed by disease and bad air, and due to the long-lasting and difficult camps in unhealthy places during the autumn. They (the Florentines) further considered that the army was reduced in numbers due to the leave permits granted to many soldiers by their officers. In fact, during the siege, many soldiers had asked and obtained leave permits due to the camp hardships and fear of illness [translated from medieval Italian, Toscanic dialect].

The coastal plains of southern Italy fell from international prominence when malaria expanded in the sixteenth century. At roughly the same time, in the coastal marshes of England, mortality from "marsh fever" or "tertian ague" (ague: via French from medieval Latin acuta (febris), acute fever) was comparable to that in sub-Saharan Africa today.[40] William Shakespeare was born at the start of the especially cold period that climatologists call the "Little Ice Age", yet he was aware enough of the ravages of the disease to mention it in eight of his plays.[41] Malaria was commonplace beside the river Thames then and even into the mid-Victorian era.[42]

Medical accounts and ancient autopsy reports state that tertian malarial fevers caused the death of four members of the prominent

Medici family of Florence [Note 1]. These claims have been confirmed with more modern methodologies.[43]

Spread to the Americas

Malaria was not referenced in the "medical books" of the

Mayans or Aztecs. Despite this, antibodies against malaria have been detected in some South American mummies, indicating that some malaria strains in the Americas might have a pre-Columbian origin.[44] European settlers and West African slaves could have brought other strains of malaria to the Americas in the 16th century.[45][46][47]

In the book 1493: Uncovering the New World Columbus Created, the author Charles Mann cites sources that speculate that the reason African slaves were brought to the British Americas was because of their resistance to malaria. The colonies needed low-paid agricultural labor, and large numbers of poor British were ready to emigrate. North of the Mason–Dixon line, where malaria-transmitting mosquitoes did not fare well, British indentured servants proved more profitable, as they would work toward their freedom. However, as malaria spread to places such as the tidewater of Virginia and South Carolina, the owners of large plantations came to rely on the enslavement of more malaria-resistant West Africans, while white small landholders risked ruin whenever they got sick. The disease also helped weaken the Native American population and made them more susceptible to other diseases.

Malaria caused huge losses to British forces in the South during the Revolutionary War as well as to Union forces during the Civil War.

Cinchona tree

Spanish

Jesuit Brother Agostino Salumbrino (1561–1642), who lived in Lima and was an apothecary by training, observed the Quechua using the bark of the cinchona tree for that purpose. While its effect in treating malaria (and hence malaria-induced shivering) was unrelated to its effect in controlling shivering from cold, it was nevertheless effective for malaria. The use of the "fever tree" bark was introduced into European medicine by Jesuit missionaries (Jesuit's bark).[50] Jesuit Bernabé de Cobo (1582–1657), who explored Mexico and Peru, is credited with taking cinchona bark to Europe. He brought the bark from Lima to Spain, and then to Rome and other parts of Italy, in 1632. Francesco Torti wrote in 1712 that only "intermittent fever" was amenable to the fever tree bark.[51] This work finally established the specific nature of cinchona bark and brought about its general use in medicine.[52]

It would be nearly 200 years before the active principles, quinine and other alkaloids, of cinchona bark were isolated. Quinine, a toxic plant alkaloid, is, in addition to its anti-malarial properties, moderately effective against nocturnal leg cramps.[53]

Clinical indications

In 1717, the dark pigmentation of a postmortem

flies and recommended swamp drainage to prevent it.[55]

19th century

In the nineteenth century, the first drugs were developed to treat malaria, and parasites were first identified as its source.

Antimalarial drugs

Quinine

Original preparation of quinine acetate by Pelletier. circa 1820.

French chemist Pierre Joseph Pelletier and French pharmacist Joseph Bienaimé Caventou separated in 1820 the alkaloids cinchonine and quinine from powdered fever tree bark, allowing for the creation of standardized doses of the active ingredients.[56] Prior to 1820, the bark was simply dried, ground to a fine powder and mixed into a liquid (commonly wine) for drinking.[57]

Cinchona ledgeriana in Java (Indonesia). By the end of the nineteenth century, the Dutch had established a world monopoly over its supply.[60]

'Warburg's Tincture'

In 1834, in

antimalarial than quinine. It was also more economical. The British government supplied Warburg's Tincture to troops in India and other colonies.[61]

Methylene blue

In 1876, methylene blue was synthesized by German chemist Heinrich Caro.[62] Paul Ehrlich in 1880 described the use of "neutral" dyes—mixtures of acidic and basic dyes—for the differentiation of cells in peripheral blood smears. In 1891, Ernst Malachowski[63] and Dmitri Leonidovich Romanowsky[64] independently developed techniques using a mixture of Eosin Y and modified methylene blue (methylene azure) that produced a surprising hue unattributable to either staining component: a shade of purple.[65] Malachowski used alkali-treated methylene blue solutions and Romanowsky used methylene blue solutions that were molded or aged. This new method differentiated blood cells and demonstrated the nuclei of malarial parasites. Malachowski's staining technique was one of the most significant technical advances in the history of malaria.[66]

In 1891, Paul Guttmann and Ehrlich noted that methylene blue had a high affinity for some tissues and that this dye had a slight antimalarial property.[67] Methylene blue and its congeners may act by preventing the biocrystallization of heme.[68]

In 1880, Charles Louis Alphonse Laveran observed pigmented parasites and the exflagellation of male gametocytes.[69]

Cause: Identification of Plasmodium and Anopheles

In 1848, German anatomist Johann Heinrich Meckel

microorganisms. He noted that quinine removed the parasites from the blood. Laveran called this microscopic organism Oscillaria malariae and proposed that malaria was caused by this protozoan.[72] This discovery remained controversial until the development of the oil immersion
lens in 1884 and of superior staining methods in 1890–1891.

In 1885,

Nobel Prize for Physiology or Medicine "in recognition of his work on the role played by protozoa in causing diseases".[75]

Dutch physician Pieter Pel first proposed a tissue stage of the malaria parasite in 1886, presaging its discovery by over 50 years. This suggestion was reiterated in 1893 when Golgi suggested that the parasites might have an undiscovered tissue phase (this time in endothelial cells).[76] Golgi's latent phase theory was supported by Pel in 1896.[77]

The notebook in which Ronald Ross first described pigmented malaria parasites in stomach tissues of an Anopheles mosquito, 20 and 21 August 1897

The establishment of the scientific method from about the mid-19th century on demanded testable hypotheses and verifiable phenomena for causation and transmission. Anecdotal reports[Note 2], and the discovery in 1881 that mosquitoes were the vector of yellow fever,[81] eventually led to the investigation of mosquitoes in connection with malaria.

An early effort at malaria prevention occurred in 1896 in Massachusetts. An

Uxbridge outbreak prompted health officer Dr. Leonard White to write a report to the State Board of Health, which led to a study of mosquito-malaria links and the first efforts for malaria prevention. Massachusetts state pathologist, Theobald Smith, asked that White's son collect mosquito specimens for further analysis, and that citizens add screens to windows, and drain collections of water.[82]

Britain's

salivary glands of mosquitoes that had fed on infected birds.[84] He reported this to the British Medical Association
in Edinburgh in 1898.

Comparative Anatomy at Rome University, showed that human malaria could only be transmitted by Anopheles (Greek anofelís: good-for-nothing) mosquitoes.[85] Grassi, along with coworkers Amico Bignami, Giuseppe Bastianelli and Ettore Marchiafava, announced at the session of the Accademia dei Lincei
on 4 December 1898 that a healthy man in a non-malarial zone had contracted tertian malaria after being bitten by an experimentally infected Anopheles claviger specimen.

In 1898–1899, Bastianelli, Bignami and Grassi were the first to observe the complete transmission cycle of P. falciparum, P. vivax and P. malaria from mosquito to human and back in A. claviger.[86]

A dispute broke out between the British and Italian schools of malariology over priority, but Ross received the 1902 Nobel Prize for Physiology or Medicine for "his work on malaria, by which he has shown how it enters the organism and thereby has laid the foundation for successful research on this disease and methods of combating it."[87]

Synthesis of quinine

Perkin's mauve was produced when attempting quinine total synthesis via the oxidation of N-allyltoluidine.[88] Before Perkin's discovery, all dyes and pigments were derived from roots, leaves, insects, or, in the case of Tyrian purple, molluscs
.

Quinine wouldn't be successfully synthesized until 1918. Synthesis remains elaborate, expensive and low yield, with the additional problem of separation of the stereoisomers. Though quinine is not one of the major drugs used in treatment, modern production still relies on extraction from the cinchona tree.

20th century

British India
, 1927

Etiology: Plasmodium tissue stage and reproduction

Relapses were first noted in 1897 by William S. Thayer, who recounted the experiences of a physician who relapsed 21 months after leaving an endemic area.[89] He proposed the existence of a tissue stage. Relapses were confirmed by Patrick Manson, who allowed infected Anopheles mosquitoes to feed on his eldest son.[90] The younger Manson then described a relapse nine months after his apparent cure with quinine.[91]

Also, in 1900 Amico Bignami and Giuseppe Bastianelli found that they could not infect an individual with blood containing only gametocytes.[92] The possibility of the existence of a chronic blood stage infection was proposed by Ronald Ross and David Thompson in 1910.[93]

The existence of asexually-reproducing avian malaria parasites in cells of the internal organs was first demonstrated by Henrique de Beaurepaire Aragão in 1908.[94]

Three possible mechanisms of relapse were proposed by

schizogony in Hepatocystis (Plasmodium) kochi.[101] In the following year, British biologists Henry Edward Shortt and Cyril Garnham described the liver stages of P. cynomolgi in monkeys.[102] In the same year, a human volunteer consented to receive a massive dose of infected sporozoites of P. vivax and undergo a liver biopsy three months later, thus allowing Shortt et al. to demonstrate the tissue stage.[103] The tissue form of Plasmodium ovale
was described in 1954 and that of P. malariae in 1960 in experimentally infected chimpanzees.

The latent or dormant liver form of the parasite (

hypnozoite), apparently responsible for the relapses characteristic of P. vivax and P. ovale infections,[104][105] was first observed in the 1980s.[72][106] The term hypnozoite was coined by Miles B. Markus while a student. In 1976, he speculated: "If sporozoites of Isospora can behave in this fashion, then those of related Sporozoa, like malaria parasites, may have the ability to survive in the tissues in a similar way."[107] In 1982, Krotoski et al reported identification of P. vivax hypnozoites in liver cells of infected chimpanzees.[106]

From 1980 onwards and until recently (even in 2022), recurrences of P. vivax malaria have been thought to be mostly hypnozoite-mediated. Between 2018 and 2021, however, it was reported that vast numbers of non-circulating, non-hypnozoite parasites occur unobtrusively in tissues of P. vivax-infected people, with only a small proportion of the total parasite biomass present in the peripheral bloodstream. This finding supports an intellectually insightful paradigm-shifting viewpoint, which has prevailed since 2011 (albeit not believed between 2011 and 2018 or later by most malariologists), that an unknown percentage of P. vivax recurrences are recrudescences (having a non-circulating or sequestered merozoite origin), and not relapses (which have a hypnozoite source). The recent discoveries did not give rise to this new theory, which was pre-existing.[108] They merely confirmed the validity thereof.[109]

Malariotherapy

See also: Pyrotherapy and Helminthic therapy

In the early twentieth century, before

dementia paralytica.[113]

AIDS,[114] and some studies of malariotherapy for HIV infection have been performed in China.[115] The United States Centers for Disease Control and Prevention does not recommend the use of malariotherapy for HIV.[115]

Panama Canal and vector control

Main article: Health measures during the construction of the Panama Canal

In 1881, Dr. Carlos Finlay, a Cuban-born physician of Scottish ancestry, theorized that yellow fever was transmitted by a specific mosquito, later designated Aedes aegypti.[116] The theory remained controversial for twenty years until it was confirmed in 1901 by Walter Reed.[117] This was the first scientific proof of a disease being transmitted exclusively by an insect vector, and demonstrated that control of such diseases necessarily entailed control or eradication of their insect vector.

Yellow fever and malaria among workers had seriously delayed construction of the Panama Canal. Mosquito control instituted by William C. Gorgas dramatically reduced this problem.[118]

Antimalarial drugs

Chloroquine

Protocol for the synthesis of Resochin, Hans Andersag 1934

Johann "Hans" Andersag[119] and colleagues synthesized and tested some 12,000 compounds, eventually producing Resochin as a substitute for quinine in the 1930s.[120][121] It is chemically related to quinine through the possession of a quinoline nucleus and the dialkylaminoalkylamino side chain. Resochin (7-chloro-4- 4- (diethylamino) – 1 – methylbutyl amino quinoline) and a similar compound Sontochin (3-methyl Resochin) were synthesized in 1934.[122] In March 1946, the drug was officially named Chloroquine.[123] Chloroquine is an inhibitor of hemozoin production through biocrystallization. Quinine and chloroquine affect malarial parasites only at life stages when the parasites are forming hematin-pigment (hemozoin) as a byproduct of hemoglobin degradation. Chloroquine-resistant forms of P. falciparum emerged only 19 years later.[124] The first resistant strains were detected around the Cambodia‐Thailand border and in Colombia, in the 1950s.[125] In 1989, chloroquine resistance in P. vivax was reported in Papua New Guinea. These resistant strains spread rapidly, producing a large mortality increase, particularly in Africa during the 1990s.[126]

Artemisinins

Systematic screening of traditional Chinese medical herbs was carried out by Chinese research teams, consisting of hundreds of scientists in the 1960s and 1970s.[127] Qinghaosu, later named artemisinin, was cold-extracted in a neutral milieu (pH 7.0) from the dried leaves of Artemisia annua.[29][128]

Artemisinin was isolated by pharmacologist Tu Youyou (Nobel Prize in Physiology or Medicine, 2015). Tu headed a team tasked by the Chinese government with finding a treatment for chloroquine-resistant malaria. Their work was known as Project 523, named after the date it was announced – 23 May 1967. The team investigated more than 2000 Chinese herb preparations and by 1971 had made 380 extracts from 200 herbs. An extract from qinghao (Artemisia annua) was effective, but the results were variable. Tu reviewed the literature, including Zhou hou bei ji fang (A handbook of prescriptions for emergencies) written in 340 BC by Chinese physician Ge Hong. This book contained the only useful reference to the herb: "A handful of qinghao immersed in two litres of water, wring out the juice and drink it all." Tu's team subsequently isolated a nontoxic, neutral extract that was 100% effective against parasitemia in animals. The first successful trials of artemisinin were in 1979.[129]

Artemisia annua being grown as a field crop in West Virginia for the production of artemisinin, 2005

Artemisinin is a sesquiterpene lactone containing a peroxide group, which is believed to be essential for its anti-malarial activity. Its derivatives, artesunate and artemether, have been used in clinics since 1987 for the treatment of drug-resistant and drug-sensitive malaria, especially cerebral malaria. These drugs are characterized by fast action, high efficacy, and good tolerance. They kill the asexual forms of P. berghei and P. cynomolgi and have transmission-blocking activity.[130] In 1985, Zhou Yiqing and his team combined artemether and lumefantrine into a single tablet, which was registered as a medicine in China in 1992. Later, it became known as "Coartem".[131] Artemisinin combination treatments (ACTs) are now widely used to treat uncomplicated falciparum malaria, but access to ACTs is still limited in most malaria-endemic countries, and only a minority of the patients who need artemisinin-based combination treatments receive them.[132]

In 2008, White predicted that improved agricultural practices, selection of high-yielding hybrids, microbial production, and the development of synthetic peroxides would lower prices.[133][134]

Insecticides

Efforts to control the spread of malaria had a major setback in 1930: entomologist Raymond Corbett Shannon discovered imported disease-bearing Anopheles gambiae mosquitoes living in Brazil (DNA analysis later revealed the actual species to be A. arabiensis).[135] This species of mosquito is a particularly efficient vector for malaria and is native to Africa.[136] In 1938, the introduction of this vector caused the greatest epidemic of malaria ever seen in the New World. However, complete eradication of A. gambiae from northeast Brazil and thus from the New World was achieved in 1940 by the systematic application of the arsenic-containing compound Paris green to breeding places, and of pyrethrum spray-killing to adult resting places.[137]

DDT

The Austrian chemist Othmar Zeidler is credited with the first synthesis of DDT (DichloroDiphenylTrichloroethane) in 1874.[138] The insecticidal properties of DDT were identified in 1939 by chemist Paul Hermann Müller of Geigy Pharmaceutical. For his discovery of DDT as a contact poison against several arthropods, he was awarded the 1948 Nobel Prize in Physiology or Medicine.[139] In the fall of 1942, samples of the chemical were acquired by the United States, Britain and Germany. Laboratory tests demonstrated that it was highly effective against many insects.

Rockefeller Foundation studies showed in Mexico that DDT remained effective for six to eight weeks if sprayed on the inside walls and ceilings of houses and other buildings.[140] The first field test in which residual DDT was applied to the interior surfaces of all habitations and outbuildings was carried out in central Italy in the spring of 1944. The objective was to determine the residual effect of the spray on anopheline density in the absence of other control measures. Spraying began in Castel Volturno and, after a few months, in the delta of the Tiber. The unprecedented effectiveness of the chemical was confirmed: the new insecticide was able to eradicate malaria by eradicating mosquitoes.[141] At the end of World War II, a massive malaria control program based on DDT spraying was carried out in Italy. In Sardinia – the second largest island in the Mediterranean – between 1946 and 1951, the Rockefeller Foundation conducted a large-scale experiment to test the feasibility of the strategy of "species eradication" in an endemic malaria vector.[142] Malaria was effectively eliminated in the United States by the use of DDT in the National Malaria Eradication Program (1947–52). The concept of eradication prevailed in 1955 in the Eighth World Health Assembly: DDT was adopted as a primary tool in the fight against malaria.

In 1953, the World Health Organization (WHO) launched an antimalarial program in parts of Liberia as a pilot project to determine the feasibility of malaria eradication in tropical Africa. However, these projects encountered difficulties that foreshadowed the general retreat from malaria eradication efforts across tropical Africa by the mid-1960s.[143]

DDT was banned for agricultural uses in the US in 1972 (DDT has never been banned for non-agricultural uses such as malaria control[144]) after the discussion opened in 1962 by Silent Spring, written by American biologist Rachel Carson, which launched the environmental movement in the West. The book catalogued the environmental impacts of indiscriminate DDT spraying and suggested that DDT and other pesticides cause cancer and that their agricultural use was a threat to wildlife. The U.S. Agency for International Development supports indoor DDT spraying as a vital component of malaria control programs and has initiated DDT and other insecticide spraying programs in tropical countries.[145]

Pyrethrum field (Chrysanthemum cinerariaefolium) Lari Hills, Nairobi, Kenya, in 2010

Pyrethrum

Other insecticides are available for mosquito control, as well as physical measures, such as draining the wetland breeding grounds and the provision of better sanitation. Pyrethrum (from the flowering plant Chrysanthemum [or Tanacetum] cinerariaefolium) is an economically important source of natural insecticide. Pyrethrins attack the nervous systems of all insects. A few minutes after application, the insect cannot move or fly, while female mosquitoes are inhibited from biting.[146] The use of pyrethrum in insecticide preparations dates to about 400 BCE. Pyrethrins are biodegradable and break down easily on exposure to light. The majority of the world's supply of pyrethrin and Chrysanthemum cinerariaefolium comes from Kenya. The flower was first introduced into Kenya and the highlands of Eastern Africa during the late 1920s. The flowers of the plant are harvested shortly after blooming; they are either dried and powdered, or the oils within the flowers are extracted with solvents.

Research

Avian, mouse and monkey models

Until the 1950s, screening of anti-malarial drugs was carried out on avian malaria. Avian malaria species differ from those that infect humans. The discovery in 1948 of

Macaca mulatta
) was used in the 1960s to test drugs active against P. vivax.

Growth of the liver stages in animal-free systems was achieved in the 1980s when pre-erythrocytic P. berghei stages were grown in wI38, a human

embryonic lung cell line (cells cultured from one specimen).[148] This was followed by their growth in the human hepatoma line HepG2.[149] Both P. falciparum and P. vivax have been grown in human liver cells; partial development of P. ovale in human liver cells was achieved; and P. malariae was grown in chimpanzee and monkey liver cells.[150]

The first successful continuous malaria culture was established in 1976 by William Trager and James B. Jensen, which facilitated research into the molecular biology of the parasite and the development of new drugs. By using increasing volumes of culture medium, P.falciparum was grown to higher parasitemia levels (above 10%).[151]

Diagnostics

The use of antigen-based malaria rapid diagnostic tests (RDTs) emerged in the 1980s.[152] In the twenty-first century, Giemsa microscopy and RDTs became the two preferred diagnostic techniques. Malaria RDTs do not require special equipment and offer the potential to extend accurate malaria diagnosis to areas lacking microscopy services.[153]

A zoonotic malarial parasite

Plasmodium knowlesi has been known since the 1930s in Asian macaque monkeys and as experimentally capable of infecting humans. In 1965, a natural human infection was reported in a U.S. soldier returning from the Pahang Jungle of the Malaysian peninsula.[154]

See also

Notes

  1. Grand Duke Francesco I
    (1531–1587)
  2. Albert Freeman Africanus King[80]
    and Laveran developed theories that malaria was caused by mosquito bites, but little evidence supported this idea.

References

  1. PMID 12364370. Archived from the original
    (PDF) on 10 January 2020. Retrieved 4 August 2012.
  2. S2CID 205747078
    .
  3. ^ The Su Wen of the Huangdi Neijing (Inner Classic of the Yellow Emperor)
  4. PMID 15539672. Archived from the original
    (PDF) on 22 February 2022. Retrieved 21 February 2010.
  5. ISBN 978-83-62753-58-1, archived from the original
    (PDF) on 7 October 2016, retrieved 5 August 2016
  6. ISBN 978-0-227-17240-7
    .
  7. ISBN 978-0-313-34102-1.[permanent dead link
    ]
  8. doi:10.1038/news021001-6
    .
  9. ^ a b Pomeroy R (3 October 2019). "Has Malaria Really Killed Half of Everyone Who Ever Lived?". RealClear Science. Archived from the original on 25 January 2023. Retrieved 28 June 2023.
  10. ^ a b Tim Harford (5 October 2013). "Have Mosquitoes Killed Half the World?". More or Less (Podcast). BBC. Retrieved 28 June 2023.
  11. S2CID 22186899
    .
  12. S2CID 20036560
    .
  13. PMID 18687771
    .
  14. ISBN 978-0-241-44067-4
    .
  15. PMID 20864995
    .
  16. PMID 24557500
    .
  17. PMID 21490952
    .
  18. PMID 19823579
    .
  19. PMID 19848219
    .
  20. PMID 16021928
    .
  21. PMID 18680669
    .
  22. ^ Macaulay GC (1890). "The History of Herodotus, parallel English/Greek translation": Herodotus, 2.125. {{cite journal}}: Cite journal requires |journal= (help)
  23. ^ "History of Malaria Control". Archived from the original on 11 November 2009. Retrieved 27 October 2009.
  24. PMID 23565222
    .
  25. ^ Hippocrates. Of the epidemics. Translated by Francis Adams. The Internet Classics Archive.
  26. PMID 18178502
    .
  27. PMID 12364371
    .
  28. PMID 14529339
    .
  29. ^
    PMID 20335947
    .
  30. PMID 16722826
    .
  31. PMID 10212890
    .
  32. ISBN 9780199248506
    .
  33. ^ Lalchhandama K (2014). "The making of modern malariology: from miasma to mosquito-malaria theory" (PDF). Science Vision. 14 (1): 3–17. Archived from the original (PDF) on 27 April 2014.
  34. ^ Osbaldeston, Tess Anne (2000). Dioscorides: De Materia Medica. Ibidis. pp. Introduction, xxvi. Archived from the original on 24 September 2014.
  35. ^ Phillips K (15 October 2018). "Archaeologists find 'vampire burial' site of a child feared capable of rising from the dead". The Washington Post. Retrieved 15 October 2018.
  36. ^ Butler's Saint for the Day (Paul Burns), Liturgical Press, p. 516
  37. ^ "Belladonna". Medline Plus. 16 December 2009. Archived from the original on 20 December 2010. Retrieved 29 November 2010.
  38. ISBN 9780849370502
    .
  39. PMID 23835014
    .
  40. PMID 7898959.
    Knottnerus O S (2002). "Malaria Around the North Sea: A Survey"
    . Gerold Wefer, Wolfgang H. Berger, Karl-Ernst Behre, Eynstein Jansen (Ed.), Climatic Development and History of the North Atlantic Realm: Hanse Conference Report. Springer-Verlag: 339–53.
  41. PMID 10653562
    .
  42. PMID 11632265
    .
  43. PMID 20673935
    .
  44. ^ Rodrigues, Priscilla (et al.) (2018). Human Migration and the Spread of Malaria Parasites to the New World.
  45. doi:10.1016/j.jas.2004.10.004
    .
  46. ISBN 9781503615045
    .
  47. PMID 22203975
    .
  48. PMID 20695174
    .
  49. PMID 330870
    .
  50. PMID 15669029
    .
  51. ^ Torti, F. "Therapeutice Specialis ad Febres Periodicas Perniciosas", 1712 Modena
  52. PMID 3134079
    .
  53. PMID 18454580
    .
  54. ^ "Malariotherapy". FactRepublic.com. 25 September 2020. Retrieved 21 July 2022.
  55. PMID 11060174
    .
  56. PMID 4600403
    .
  57. PMID 16562233
    .
  58. ^ Canales NA (7 April 2022). "Hunting lost plants in botanical collections". Wellcome Collection. Retrieved 9 May 2022.
  59. ^ "The weird and wonderful world of the plant hunters - part 4: Quinine, the cinchona tree and empires in competition". Trees for Cities. 2 April 2020. Retrieved 9 May 2022.
  60. PMID 3334083
    .
  61. ISBN 978-1-85070-068-5
    .
  62. S2CID 1823696
    .
  63. ^ Malachowski E (1891). "Zur Morphologie des Plasmodium malariae". Centbl F Klin Med. 31: 601–03.
  64. ^ Romanowsky D (1891). "Zur Frage der Parasitologie und Therapie der Malaria". St Petersburg Med Wochenschr. 16: 297–302, 307–15.
  65. PMID 11933573
    .
  66. S2CID 19829220
    .
  67. ^ Guttmann P, Ehrlich P (1891). "Ueber die Wirkung des Methylenblau bei Malaria" (PDF). Berliner Klinische Wochenschrift. 28: 953–56. Archived from the original (PDF) on 3 March 2012. Retrieved 24 July 2010.
  68. PMID 15941412
    .
  69. ^ Laveran CLA (1880). "Note sur un nouveau parasite trouvé dans le sang de plusieurs malades atteints de fièvre palustres". Bulletin de l'Académie de Médecine. 9: 1235–36.
  70. ^ Lorber CG, Lorber CP, Schneider J (2005). "Die Medizinerfamilie Meckel aus Wetzlar" (PDF). Hess Aerzteblatt. 2: 95–99. Archived from the original (PDF) on 19 July 2011.
  71. ^ Meckel H. (1847). "Ueber schwarzes Pigment in der Milz und dem Blute einer Geisteskranken". Zeitschrift für Psychiatrie. IV: 198–226.
  72. ^
    PMID 20205846
    .
  73. ^ Grassi B, Feletti R (1890). "Parasites malariques chez les oiseaux". Arch. Ital. Biol. 13: 297–300.
  74. PMID 2578751
    .
  75. ^ "Biography of Alphonse Laveran". The Nobel Foundation. Retrieved 15 June 2007.
  76. ^ Golgi C (1893). "Sulle febbri malariche estivo-autumnali di Roma". Gass Med di Pavia. 2: 481–93, 505–20, 529–44, 553–59.
  77. ^ Pel PK (1886). "Mededeelingen uit de Geneeskundige kliniek. Malaria infectie". Ned Tijdschr Geneeskd. 22: 341–58.
  78. PMID 14130055
    .
  79. PMID 20755205
    .
  80. ^ King AFA (1883). "Insects and disease, mosquitoes and malaria". Popular Sci. Monthly, Sep. 23: 644–58.[permanent dead link]
  81. ^ WHO (2013). "Yellow fever". Fact Sheet 2013.
  82. ^ "A History of Mosquitoes in Massachusetts, by Curtis R. Best". Northeast Mosquito Control Association. Retrieved 31 March 2008.
  83. ^ "World Mosquito Day 2010". Department for International Development. 20 August 2010. Archived from the original on 31 October 2012. Retrieved 21 November 2012.
  84. ^ "Biography of Ronald Ross". The Nobel Foundation. Retrieved 15 June 2007.
  85. PMID 16636993
    .
  86. ^ Grassi B, Bignami A, Bastianelli G (1899). "Ulteriore ricerche sul ciclo dei parassiti malarici umani sul corpo del zanzarone". Accad Lincei (8): 21–28.
  87. ^ "Ross and the Discovery that Mosquitoes Transmit Malaria Parasites". CDC Malaria website. Archived from the original on 2 June 2007. Retrieved 15 June 2007.
  88. PMID 17294412
    .
  89. ISBN 978-0-543-91236-7
    .
  90. PMID 12230309
    .
  91. PMID 20759742
    .
  92. ^ Bignami A, Bastianelli G (1900). "Sulla inoculazione delle sangue di semiluna malariche d'uomo". Atti Soc Studi Malar. 1: 15–20.
  93. S2CID 86898611
    .
  94. S2CID 86462883
    .
  95. ^ Marchoux E (1926). "Paludisme". J. B. Bailliere, Paris.
  96. ^ James SP (1931). "The use of plasmoquine in the prevention of malarial infections". Proc R Acad Sci Amst. 34: 1424–25.
  97. JSTOR 30088998
    .
  98. PMID 20293965
    .
  99. PMID 20275230
    .
  100. doi:10.4269/ajtmh.1947.s1-27.271
    .
  101. PMID 20243887
    .
  102. S2CID 4105546
    .
  103. PMID 15393036
    .
  104. PMID 1735093
    .
  105. PMID 25816801
    .
  106. ^
    PMID 6816080
    .
  107. S2CID 1727294
    .
  108. PMID 35399558
    .
  109. S2CID 252579139
    .
  110. PMID 24202157
    .
  111. ^ Wagner-Jauregg J. (1931). "Verhütung und Behandlung der Progressiven Paralyse durch Impfmalaria". Handbuch der Experimentellen Therapie, Ergänzungsband München.
  112. S2CID 20786200
    .
  113. ^ "The Nobel Prize in Physiology or Medicine 1927". The Nobel Foundation. Retrieved 28 July 2007.
  114. ^ Brian Ross And Joseph Rhee (8 June 2007). "Dr. Heimlich's New 'Maneuver': Cure AIDS With Malaria". ABC News.
  115. ^
    PMID 12781493
    .
  116. ^ Finlay CJ. (1881). "El mosquito hipotéticamente considerado como agent de transmision de la fiebre amarilla". Anales de la Real Academia de Ciencias Médicas Físicas y Naturales de la Habana (18): 147–69.
  117. doi:10.1001/jama.1901.52470070017001f
    .
  118. S2CID 24222445
    .
  119. S2CID 54526057
    .
  120. S2CID 30446678
    .
  121. S2CID 8037461
    .
  122. PMID 14021822
    .
  123. PMID 21019115
    .
  124. S2CID 11343688
    .
  125. PMID 15462966
    .
  126. PMID 11756044
    .
  127. S2CID 73573938
    .
  128. PMC 6254926
    .
  129. PMID 21907397
    .
  130. PMID 16723547
    .
  131. PMID 19876540
    .
  132. PMID 18165491
    .
  133. S2CID 39014319
    .
  134. PMID 18165493
    .
  135. ISBN 978-0-7868-8667-8
    ..
  136. PMID 18187802
    .
  137. ^ Russell PF, West LS, Manwell RD, MacDonald G (1963). Practical Malariology 2nd ed. Oxford University Press, London, New York, Toronto.
  138. doi:10.1002/cber.18740070278
    .
  139. ^ "The Nobel Prize in Physiology or Medicine 1948". The Nobel Foundation. Retrieved 28 July 2007.
  140. ^ The Rockefeller Foundation (1944). "Annual Report" (PDF). Archived from the original (PDF) on 10 April 2013. Retrieved 25 March 2014. {{cite journal}}: Cite journal requires |journal= (help)
  141. PMID 20292226
    .
  142. PMID 19788815
    .
  143. S2CID 23161797
    .
  144. ^ Michael Palmer, The ban of DDT did not cause millions to die from malaria
  145. PMID 18165500
    .
  146. PMID 19496422
    .
  147. ^ Vincke IH, Lips M (1948). "Un nouveau plasmodium d'un rongeur sauvage du Congo: Plasmodium berghei n.sp". Annales de la Société Belge de Médecine Tropicale. 28: 97–104.
  148. PMID 6343574
    .
  149. PMID 2489396
    .
  150. PMID 12097244
    .
  151. PMID 12097244
    .
  152. S2CID 16953840
    .
  153. PMID 19399160
    .
  154. PMID 23088834. Archived from the original
    (PDF) on 3 March 2016. Retrieved 23 March 2014.

Further reading

External links

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