Infectious coryza in chickens

Source: Wikipedia, the free encyclopedia.

Infectious

clinical signs.[1]

Signs and symptoms

Clinical appearance of the disease includes depression, a serous nasal discharge, and sporadically minor facial inflammation in the mild form of the disease. In severe form, severe inflammation of one or both infraorbital sinuses with edema of the surrounding tissue occurs. The swelling can cause closure of one or both eyes. Intermandibular space and wattles of cocks do swell in the course of the disease.[2][3]

Cause

The disease is caused by the bacterium

serovars of A. paragallinarum are A, B, and C, related by immunotype specificity.[1][2]

Transmission

The

contaminated water. Chickens having infection and those carriers contribute highly to the disease transmission.[2][3]

Diagnosis

Diagnosis is by isolation of bacteria from chickens suspected to have a history of coryza and clinical findings from infected chickens.[1][4] Polymerase chain reaction testing is a reliable means of diagnosis of the disease.[5][6][7][8]

Treatment

Prevention is through use of stock coryza-free

fluoroquinolones.[2][3]

References

  1. ^ a b c d Blackall P J, Matsumoto M., Yamamoto R. Infectious coryza. In: Calnek B W, Barnes H J, Beard C W, McDougald L R, Saif Y M, editors. Diseases of poultry. 10th ed. Ames: Iowa State University Press; 1997. pp. 179–190
  2. ^ a b c d e Merck Veterinary Manual, 2016
  3. ^ a b c "Poultry, Poultry Health, Welfare, Diseases, Poultry News, Articles, Photos of Chickens, Poultry Photo". The Poultry Site.
  4. ^ Bragg R R, Greyling J M, Verschoor J A. Isolation and identification of NAD-independent bacteria from chickens with symptoms of infectious coryza. Avian Pathol. 1997;26:595–606
  5. ^ Blackall P J, Yamamoto R. Infectious coryza. In: Swayne D E, editor. A laboratory manual for the isolation and identification of avian pathogens. 4th ed. Philadelphia, Pa: American Association of Avian Pathologists; 1998. pp. 29–34
  6. ^ Chen X, Chen Q, Zhang P, Feng W, Blackall P J. Evaluation of a PCR test for the detection of Haemophilus paragallinarum in China. Avian Pathol. 1998;27:296–300.
  7. ^ Chen X, Miflin J K, Zhang P, Blackall P J. Development and application of DNA probes and PCR tests for Haemophilus paragallinarum. Avian Dis. 1996;40:398–407
  8. ^ Chen X, Song C, Gong Y, Blackall P J. Further studies on the use of a polymerase chain reaction test for the diagnosis of infectious coryza. Avian Pathol. 1998;27:618–624.
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