Isolation of the organism from visceral organs of birds undergoing decomposition must be interpreted cautiously as E.
coli from lesions typical of colibacillosis. Diagnosis is based on isolation and identification of E. The various forms of colibacillosis are considered to be the most common infectious bacterial disease of broiler chickens and turkeys. This chapter offers detailed coverage of the history, etiology, pathobiology, epidemiology, diagnosis, and intervention strategies of campylobacteriosis. Syndromes of disease include colisepticemia, hemorrhagic septicemia, coligranuloma, airsacculitis, swollen‐head syndrome, venereal colibacillosis, coliform cellulitis, peritonitis, salpingitis, orchitis, osteomyelitis/synovitis, panophthalmitis, omphalitis/yolk sac infection, and enteritis. Changes in small flocks are best prevented by monitoring body weights and feed intake, and by limiting access to high fat treats.Ĭolibacillosis refers to any localized or systemic infection caused entirely or partly by avian pathogenic Escherichia coli. Physical examination can reveal an enlarged liver. Liver disease may be detected using biochemical tests. The lesions are characterized by multifocal discoid ulcers in the small intestine and multifocal hepatic necrosis. The top five differential diagnoses for poultry include fowl pox, candidiasis, trichomoniasis, vitamin A deficiency, and aspergillosis.
This chapter is organized to assist the veterinary practitioner to first look for clinical signs, followed by descriptions of diseases that can be considered by biopsy or necropsy. While there are conditions, such as intestinal parasitism, that primarily affect the gastrointestinal tract, conditions of other systems, such as respiratory disease, might present with gastrointestinal signs (e.g., diarrhea).
One way to clinically assess the gastrointestinal health of poultry is to observe their feces. Gastrointestinal diseases are common in floor‐raised backyard chickens.
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