Infectious coryza in meat chickens in the San Joaquin Valley of California.

R. Droual, A. A. Bickford, B. R. Charlton, G. L. Cooper, S. E. Channing

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Abstract

Two cases of infectious coryza in meat chickens are reported. The first case involved 6-week-old broiler chickens in which only Haemophilus paragallinarum was isolated. The second case involved 11-week-old roaster chickens in which H. paragallinarum and Mycoplasma synoviae were isolated. Both farms were in close proximity to layer-chicken farms where infectious coryza had been previously diagnosed. In both cases, only certain houses on the farm were affected, and mortality in these houses increased slightly. At processing, the condemnation rates for affected houses were considerably higher than rates for unaffected houses. Condemnations for affected houses were mostly due to airsacculitis. A dissecting fibronopurulent cellulitis was a prominent lesion in the second case. This lesion could lead to confusion with chronic fowl cholera and swollen-head syndrome.

Original languageEnglish (US)
Pages (from-to)1009-1016
Number of pages8
JournalAvian Diseases
Volume34
Issue number4
StatePublished - Oct 1990

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ASJC Scopus subject areas

  • Cancer Research
  • Immunology
  • veterinary(all)

Cite this

Droual, R., Bickford, A. A., Charlton, B. R., Cooper, G. L., & Channing, S. E. (1990). Infectious coryza in meat chickens in the San Joaquin Valley of California. Avian Diseases, 34(4), 1009-1016.