related to the study of bacteria, especially those that cause disease

A bacteriological pesticide was sprayed over the area to combat West Nile virus. 一种基于细菌的杀虫剂被喷洒在这一区域，用于对抗西尼罗河病毒。

There was no active threat of bacteriological and chemical warfare. 不存在细菌战和化学战的实际威胁。