New study investigating causes of disease in small-scale chicken flocks in the Mekong Delta of Vietnam

16th January 2020 Past Events and Activities Scientific Publications 0

A recent study investigating pathogens affecting chicken flocks has recently been published in the Poultry Science journal. The study, led by Ms. Nguyen Thi Bich Van (ViParc research assistant of ViParc), investigated 61 diseased small-scale flocks and a total of 122 chickens. The team investigated a total of 5 bacteria, 4 viruses and the presence of gastrointestinal helminths using a broad range of laboratory techniques. In addition, serological profiles (ELISA) were also determined against 6 pathogens. To date, this study is the most comprehensive study investigated poultry diseases in the Mekong Delta. In 49 (80.3%) flocks, at least one bacterial or viral pathogen was detected, and in 29 (47.5%) flocks, more than one pathogen was detected. The study also documented A. paragallinarum was detected in 62.3% flocks, followed by M. gallisepticum (26.2%), Infectious bursal disease viruses [IBD] (24.6%) and Infectious bronchitis viruses [IB] (21.3%), septicemic E. coli (14.8%), O. rhinotracheale [ORT] (13.1%), and Highly pathogenic avian influenza [HPAI] viruses (4.9%). Of all flocks, 67.2% flocks were colonized by helminths. In terms of severity, HPAI accounted for the greatest mortality of affected flock. The study highlights frequency of diseases occurrence in small-scale chicken flocks, showing that control of A. paragallinarum, HPAI, IBD, IB, M. gallisepticum, and gastrointestinal helminths should be a priority in the region.
The full study can be accessed here:

Investigators performing a necropsy on a 12 week-old flock