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What is Epidemic typhus cause and vector is and explain in detail?
Epidemic Typhus Is a type of rickettsial disease of typhus group : Recrudence form of Epidemic typhus : Brill Zinsser Disease Was the 'most formidable rickettsial disease in past' Causative agent: R.prowazekii Vector : Louse (p.capitis,p.corporis) Mode of Transmission: (Not by Louse bite) Scratching and inoculation with infected louse faeces Crushing infected louse on body Inhalation of infected louse faeces or dust Clinical picture : Prolonged febrile illness, Vasculitis Drug of choice : Tetracycline Under International Health Regulations (IHRs), "Louse borne typhus is a disease under surveillance" Ref: Park 25th edition Pgno : 316