This lecture covers the identification, chemical tests, differentiation, symptoms, diagnosis, and treatment of Rickettsiae, Chlamydiae, and Mycoplasma. It explores the similarities and differences between Rickettsiae and Chlamydiae, as well as their characteristics, growth requirements, and examples

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Rickettsiae are pleomorphic intracellular coccobacilli with unique parasitic behavior, leading to vascular lesions and systemic manifestations in humans. The infections are spread by insect vectors and are characterized by fever, headache, malaise, skin rash, and organ enlargement. Different types o

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