Infectious bronchitis outbreaks in vaccinated poultry in Connecticut

• Published in: Avian diseases Vol. 17; no. 3; pp. 540 - 545
• Main Authors: Van der Heide, L, Johnson, R.B, Bryant, E.S
• Format: Journal Article
• Language: English
• Published: United States American Association of Avian Pathologists, Inc 01-07-1973
• Subjects: Animals; Bronchitis; Bronchitis - epidemiology; Bronchitis - microbiology; Bronchitis - pathology; Bronchitis - prevention & control; Bronchitis - veterinary; Chickens; Connecticut; Coronaviridae - immunology; Coronaviridae - isolation & purification; Disease outbreaks; Disease Outbreaks - veterinary; Flocks; Fluorescent Antibody Technique; Hyperplasia; Infections; Lesions; Lung - pathology; Massachusetts; Memory interference; Poultry Diseases - epidemiology; Poultry Diseases - microbiology; Poultry Diseases - pathology; Poultry Diseases - prevention & control; Trachea; Trachea - pathology; Vaccination - veterinary; Virus Diseases - epidemiology; Virus Diseases - microbiology; Virus Diseases - pathology; Virus Diseases - prevention & control; Virus Diseases - veterinary; Viruses; Connecticut; Massachusetts
• ISSN: 0005-2086; 1938-4351
• DOI: 10.2307/1589152

Infectious bronchitis (IB) virus was isolated from a large number of cases of respiratory disease in Connecticut chickens. Eight isolates were all characterized as the JMK strain of IB. Most cases occurred in flocks that were well vaccinated with Massachusetts strain IB vaccine and, where tested, exhibited good virus-neutralizing serum titers. Histopathologic lesions in the trachea in acute cases consisted mainly of epithelial hyperplasia with little or no edema or mononuclear infiltration, a lesion pattern that is described as typical of Newcastle disease (ND). However, no ND infections were found in these cases of IB.