Outbreak of Avian Tuberculosis in 48-Week-Old Commercial Layer Hen Flock
- 1 October 2002
- journal article
- Published by American Association of Avian Pathologists (AAAP) in Avian Diseases
- Vol. 46 (4), 1055-1061
- https://doi.org/10.1637/0005-2086(2002)046[1055:ooatiw]2.0.co;2
Abstract
This report describes an outbreak of tuberculosis in a flock of 38,500 48-wk-old layer hens. Clinical characteristics of the process included a gradual drop in egg production and feed intake, as well as an increased mortality rate. Two well-defined clinical features were observed. On the one hand, a number of birds displayed good body condition and continued to lay but presented granulomatous nodular lesions, particularly in the infraorbital sinus, liver, and intestine. In contrast, other hens were emaciated and presented granulomatous lesions of various sizes throughout the internal organs. The lesions observed in the various organs of all the affected birds consisted of granulomas containing acid/alcohol-fast bacilli. The presence of Mycobacterium avium was confirmed through polymerase chain reaction techniques. This report describes the epidemiologic and histopathologic characteristics of the outbreak.Keywords
This publication has 8 references indexed in Scilit:
- Mycobacterium infection in a captive-reared capercaillie (Tetrao urogallus).Avian Diseases, 2000
- Direct costs of endemic dXiseases of farm animals in Great BritainVeterinary Record, 1999
- Bacterial enteritides of poultryPoultry Science, 1998
- Avian tuberculosis caused by Mycobacterium avium serotype 3 in captive wildfowlVeterinary Record, 1997
- Clinical manifestations of mycobacteriosis in pet birdsSeminars in Avian and Exotic Pet Medicine, 1997
- Haematological changes in domestic fowl(Gallus gallus)and cranes (Gruiformes) withMycobacterium aviuminfectionAvian Pathology, 1990
- Avian cerebral tuberculosisVeterinary Record, 1988
- Strahlenschutzwirkung von Pyrexal®Naunyn-Schmiedebergs Archiv für experimentelle Pathologie und Pharmakologie, 1965