在一些国家，无沙门氏杆菌鸡群的喂养越来越普遍。
Salmonella-free chicken herds are becoming more common in some countries.
布氏杆菌病对公共卫生和经济的重要性是世界性的广泛问题。
Brucellosis is a worldwide problem of both public health and economic importance.
本试验还对鸭疫里氏杆菌的培养条件、灭活条件进行了优化。
In the experiment, the conditions for RA culture and inactivation were optimized.
本试验还对鸭疫里氏杆菌的培养条件、灭活条件进行了优化。
In the experiment, the conditions for RA culture and inactivation were optimized.
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