Result: The results by Methylene blue stain showed that the plaque include many bacteria, such as coccus,bacilli,campilobacter and so on, in which some bacteria went to necrosis;

• 结果:染色显示菌斑中含有球状菌、杆状菌以及丝状菌等细菌,其中部分细菌会出现坏死现象;革兰氏染色显示阳性菌大多为球状或杆状菌,呈散在分布;