obligate pathogenic bacteria

例句：

1. 1.Obligate pathogenic bacteria are known to cause serious diseases in humans.
   已知强迫性致病菌会引发人类严重的疾病。
2. 2.The obligate pathogenic bacteria that cause the disease were discovered by scientists.
   科学家发现了导致这种疾病的强迫性致病菌。
3. 3.Researchers have been studying obligate pathogenic bacteria for years, hoping to find a cure for this deadly disease.
   研究人员多年来一直在研究强迫性致病菌，希望找到这种致命疾病的治愈方法。