Serological Investigation on Bovine and Ovine Brucellosis in Henan Province in 2023
In order to investigate the prevalence and immunization level of bovine and ovine brucellosis in Henan Province,10 807 samples from 404 farms/households were collected for laboratory test in 2023,and the results were statistically analyzed according to the species of animals,types of vaccines and immunization methods.The results showed that,for 229 farms/populations without vaccination,the positive rates of farm/population and individual on cattle farms/households were 0,but 2.00%and 0.24%on sheep intensive farms,respectively,and 3.13%and 3.44%on sheep smallholder farms,respectively.For 175 farms/populations with vaccination,the antibody positive rates were 55.75%and 48.43%on cattle intensive farms and smallholder farms,respectively,but 81.11%and 58.14%on sheep intensive farms and smallholder farms,respectively.Cattle were mainly vaccinated with A19,M5-90Δ26 and S2 vaccines,with antibody positive rates of 63.43%,40.00%and 21.11%,respectively,and the positive rate obtained through intramuscular injection was the highest;while sheep were mainly vaccinated with M5-90Δ26 and S2 vaccines,with antibody positive rates of 78.28%and 54.49%,respectively,and the positive rates obtained through subcutaneous and intramuscular injection were higher.In conclusion,brucellosis was effectively prevented,controlled and purified in cattle in Henan Province,but there was still a risk of occasional outbreak in sheep,indicating that the disease should be further prevented and controlled on sheep farms/households,especially those with small scale,the level of immunization on cattle farms/households should be improved,where A19 or M5-90Δ26 vaccines might be used through intramuscular injection,while M5-90Δ26 or S2 vaccines might be injected intramuscularly or subcutaneously on sheep farms/households.
万方数据
维普
