What Is a Tick Bite Rash?

The pathogen of this disease is rickettsial Plasmodium, which is parasitic in the cytoplasm of vascular endothelial cells of humans and animals and in the epithelial cells of the intestinal wall of human lice. It also attaches to red blood cells and platelets during rickettsemia. Its basic The shape is a micro-ball shape, arranged in a chain shape along the long axis, but it is multi-shaped in the developmental stage of the lice intestine, which can be spherical, short rod-shaped, rod-shaped or long-lined, about 0.3 to 1 m, 0.3 to 0.4 m, Gram staining is negative. The chemical composition and metabolites of the pathogen include proteins, sugars, fats, phospholipids, DNA, RNA, various enzymes, vitamins and endotoxin-like substances. The lipopolysaccharide layer on the cell wall has endotoxin-like effects. Platts rickettsia is sensitive to heat, ultraviolet rays, and general chemical disinfectants. It can be inactivated at 56 ° C for 30 minutes. It has a strong tolerance to low temperature and dryness. It can survive for several months in dry lice feces, and typhus Rickettsia and Proteus OX19 antigen components cross, so the patient's serum can react with Proteus OX19 agglutination reaction, that is, Wai Fei reaction, Platts rickettsiae contains the group specific soluble heat resistance Sex-specific antigen Particulate antigen, which can be borrowed by serological examination Mohs rickettsial infections differentiated.