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病原菌的一般生物性质 1.形态与染色:白喉的病原菌是一种白喉杆菌,为革兰氏染色阳性,不能运动,不产生芽胞,也没有荚膜。在吕弗琉氏血清斜面培养基上生长24小时后,用涂片检查其形态最为典型,呈细而直或略弯曲,长短不等,长约1—6微米,宽0.3—0.8微米。具有多形态性, 常在一端或两端呈棍棒状肥大,偶而可见中央最宽,两端最尖细的。在菌体的两端或中央有异染颗粒,便是所谓白欧二氏小体,又因颗粒多在两端,所以叫做极体,用奈瑟氏染色法染色菌体呈黄色,极体呈深蓝色。有些细菌特别
General biological properties of pathogens 1. Morphology and staining: The diphtheria pathogen is a diphtheria bacterium that is Gram-positive and does not move, produces no spores, and does not have aponeurosis. After growing for 24 hours on Luffalo’s serum slant culture medium, the smears were examined for their most typical morphology. They were fine and straight or slightly curved, ranging in length from about 1 to 6 microns in length and 0.3 to 0.8 microns in width. It is polymorphic and often has a stick-like hypertrophy at one or both ends. Occasionally, the center is the widest and the two ends are the most tapered. At the ends or in the center of the bacteria, there are heterogeneous particles, which are so-called “white European dinos”, and because the particles are mostly at both ends, they are called polar bodies. The cells are stained with Neisser’s staining and the bodies are yellow. Dark blue. Some bacteria are special