Abstract
Synergistic pathological effect of Mycoplasma gallisepticum (MG) with Ornithobacterium rhinotracheale (ORT) infection in layer chicken was evaluated in 70 commercial layer chicken farms. Ornithobacterium rhinotracheale organism was confirmed by its growth characteristics on agar media and typical morphology on Gram's staining. Polymerase chain reaction technique was used for the confirmation of Mycoplasma gallisepticum. Other concurrent respiratory viral infections like Newcastle disease and infectious bronchitis were ruled out by hemaggutination andinhibition tests and bacterial diseases like colibacillosis, pasteurellosis and infectious coryza were ruled out by culture and staining techniques. The severity of clinical signs, gross pathology and histopathology increased in combined cases of MG and ORT than individual occurrence of these diseases. Zero and 7.8% mean mortality rate were observed in ORT and MG infections respectively, whereas 15% mean mortality rate was recorded in the combined cases. The synergistic increase in mortality rate of MG with ORT was clearly supported by the gross and histopathological alterations.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
