The results of sero-surveillance show that there is still high infection rate on hypodermosis in China and the average infection rate is even up to 28.45%.
对我国北方地区牛的血清检测结果表明该地区牛的牛皮蝇蛆病仍然处于较高的感染状态，平均感染率为28.45％；
The results of sero-surveillance show that there is still high infection rate on hypodermosis in China and the average infection rate is even up to 28.45%.
对我国北方地区牛的血清检测结果表明该地区牛的牛皮蝇蛆病仍然处于较高的感染状态，平均感染率为28.45％；
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