由各种侵袭性细菌所致，如志贺菌、沙门菌、EIEC、空肠弯曲菌、耶尔森菌和金黄色葡萄球菌等。
O O O B-mic I-mic I-mic I-mic I-mic O O O O B-mic I-mic I-mic O B-mic I-mic I-mic O B-mic I-mic I-mic I-mic O B-mic I-mic I-mic I-mic I-mic O B-mic I-mic I-mic I-mic O B-mic I-mic I-mic I-mic I-mic I-mic I-mic O O