第二节恙虫病【病原及流行病学】恙虫病立克次体是恙虫病（scrubtyphus）的病原体，又称东方立克次体。
O O O B-dis I-dis I-dis O O O O O O O O O B-mic I-mic I-mic I-mic I-mic I-mic I-mic O B-dis I-dis I-dis O B-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis O O O O O O O O B-mic I-mic I-mic I-mic I-mic I-mic O