CHITWAN: The National Avian Disease Investigation Laboratory in Chitwan has confirmed the presence of Chicken anemia virus (CAV) in poultry in Chitwan and several other districts, following a three-month-long study.
Laboratory chief Dr. Bijay Kumar Shrestha said the infection was confirmed through ELISA testing. Of the 92 samples tested, 31, about 33%, were found positive for the virus.
“This disease reduces the birds’ immunity, making them more susceptible to other infections,” Dr. Shrestha explained. “While immediate symptoms may not be apparent, it has a long-term economic impact due to reduced production.”
Common symptoms include anemia, stunted growth, and decreased egg or meat production. Although infected chickens may continue eating and moving normally, Dr. Shrestha warned against ignoring the disease, as its effects are long-lasting.
He said the virus was first detected in Nepal two years ago in Kathmandu. To prevent infection, vaccination against Chicken Anemia Virus is necessary for both broiler and layer parent stocks, as well as chicks.
The laboratory tests samples collected from 16 districts, including Chitwan. In the last fiscal year, it tested 7,000 chickens from 2,500 farmers. The findings included Low Pathogenic Avian Influenza (H9) in 48 cases, Newcastle disease in 13 cases, Gumboro disease in 122 cases, and Infectious Bronchitis in 2 cases.
Similarly, liver tests of 1,120 chickens revealed E. coli in 785 cases and Salmonella in 112 cases.
Dr. Shrestha said such infections were largely due to poor biosecurity. He stressed that strict hygiene should be maintained when transporting feed, water, medicine, bedding materials, and eggs.
Disinfection facilities are available in the market, and all people and vehicles entering farms should be thoroughly disinfected, he added.
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