Rickettsiae
Rickettsiae Introduction This family consist of 3 genera – Rickettsia Orientia Ehrlichia Morphology Gram negative Pleomorphic coccobacilli Obligate intracellular organisms Non motile Non capsulated Stain bluish purple with Giemsa and Castaneda stains Stain deep red with Machiavella and Gimenez stains Culture Rickettsiae are unable to grow in cell free media. Exception to this rule, R. Quintana Growth […]


