Severe mortality in broiler chickens associated with Mycoplasma synoviae and Pasteurella gallinarum.

R. Droual, H L Shivaprasad, C. U. Meteyer, D. P. Shapiro, R. L. Walker

Research output: Contribution to journalArticle

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Severe economic loss due to high mortality and condemnation rates occurred on two commercial broiler facilities. Chickens had moderate-to-severe airsacculitis, pericarditis, perihepatitis, tracheitis, and synovitis. Pasteurella gallinarum was isolated from 16 of 18 pericardia, four of 14 livers, 11 of 16 air sacs, six of seven joints and one of 28 tracheas in pure culture. In addition, Mycoplasma synoviae was isolated from trachea and air sac. Lesions were suggestive of an Escherichia coli septicemia, but E. coli was isolated from only four of 28 tracheas and one of 14 livers in pure culture. A coronavirus was isolated from trachea and lung. Whether this coronavirus represented a vaccine or field strain of infectious bronchitis was not determined. These findings suggested that the severe lesions were due to a concomitant infection with an atypical strain of P. gallinarum.

Original languageEnglish (US)
Pages (from-to)803-807
Number of pages5
JournalAvian Diseases
Issue number3
StatePublished - Jul 1992


ASJC Scopus subject areas

  • Cancer Research
  • Immunology
  • veterinary(all)

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