So it's has great significance to construct the mutant storehouse and slecte the toxicity weak Hps mutant strain for developing the genetic engineering attenuated vaccine.
3
采用大体剖检、常规石蜡切片、H.E染色法研究猪副猪嗜血杆菌感染的病理变化。
The pathological changes of haemophilus parasuis infection in swine were studied with the methods of gross anatomy, routine paraffin section and H·E staining.
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