False layer syndrome in Canada due to DMV/1639

Published 2021년 8월 24일

Tridge summary

A recent study by Mohamed Hassan and his team at the University of Calgary, as reported by Poultry Health Today, has revealed a significant increase in the prevalence of the DMV/1639 strain of Infectious Bronchitis Virus (IBV) in Canada, with numbers rising from 1% in 2015 to 45% in 2018. This strain is known to cause false layer syndrome in hens, leading to a substantial drop in egg production and quality. The research confirmed the virus's impact on the oviducts, with affected hens showing signs of reproductive tract damage. Despite a robust local and systemic immune response, the virus managed to cause notable damage, prompting the researchers to explore further. This finding underscores the urgent need to develop strategies to combat this strain of IBV to ensure efficient egg production in poultry.

Disclaimer:The above summary was generated by Tridge's proprietary AI model for informational purposes.

Original content

Hens with false layer syndrome can look healthy, but if they’re infected with DMV/1639, egg production can be adversely affected since the virus affects the oviducts, Mohamed Hassan, a PhD student at the University of Calgary, told Poultry Health Today. Egg production can be reduced significantly, while producers may also see poor quality eggs, he said. Hassan and colleagues infected specific-pathogen-free chickens in peak lay with a Canadian strain of DMV/1639 to understand the lesions caused by the pathogen, particularly in the reproductive tract. Compared to uninfected controls, egg production in the infected hens dropped from 90% to 40% starting 5 days post-infection. Upon necropsy at 10 days post-infection, the investigators found regressed ovaries and atrophied oviducts, as well as missing epithelium, edema and protein deposition in the uterus, Hassan reported. ELISA testing of reproductive tract washes to measure the local and systemic immune response demonstrated a ...

Source: Thepoultrysite