Longitudinal monitoring for respiratory pathogens in broiler chickens reveals co-infection of Chlamydia psittaci and Ornithobacterium rhinotracheale.

Longitudinal monitoring for respiratory pathogens in broiler chickens reveals co-infection of Chlamydia psittaci and Ornithobacterium rhinotracheale. J Med Microbiol. 2015 Feb 27; Authors: De Boeck C, Kalmar I, Dumont A, Vanrompay D Abstract Chlamydia psittaci (C. psittaci) is prevalent in chicken broiler production. However, the role of C. psittaci in the respiratory disease complex needs to be clarified. It was our purpose to identify the time point when a C. psittaci infection appeared on a broiler farm and to examine the presence of other respiratory pathogens at that time. We focused on the 'major' respiratory pathogens occurring in Belgian broilers namely Infectious bronchitis virus (IBV), Avian metapneumovirus (aMPV), Ornithobacterium rhinotracheale (O. rhinotracheale), Mycoplasma gallisepticum (M. gallisepticum) and Mycoplasma synoviae (M. synoviae) and examine their co-occurrence with C. psittaci on 3 commercial broiler farms. For all farms, one-day old broilers showed high maternal antibody titers against C. psittaci in the presence of viable C. psittaci. Maternal antibodies seemed to protect against respiratory signs. Maternal antibodies declined and clinical outbreaks could be serologically noticed even before maternal antibodies completely disappeared. Mixed infections with genotypes B/C and B/C/D were observed. Broilers with C. psittaci antibody increases showed conjunctivitis, signs of upper respiratory disease and dyspnoea. C. psittaci al...
Source: Journal of Medical Microbiology - Category: Microbiology Authors: Tags: J Med Microbiol Source Type: research

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