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What is Incubation period for diptheria and salmonella is and explain in detail?
Diphtheria Causative agent : Corynebacterium diphtheriae, a gran positive non-motile organism Diphtheria is an endemic disease in India Source of Infection Carriers are more impoant as source of infection: 95% of total disease transmission Nasal carriers are more dangerous than throat carriers Incidence of carriers in a community : 0.5-1% Immunization does not prevent carrier state Incubation period : 2-6 days Mode of transmission Droplet infection (main mode), directly from cutaneous lesions anf fomites. Ref : Park 25th edition Pgno : 235 Typhoid Causative agent : Salmonella typhi Reservoir of infection : Man (cases and carriers) Source of infection : Faeces, urine of cases/carriers (primary source) and water, food fingers, flies (secondary sources) Incubation period: 10-14 days Mode of transmission : Faeco-oral route, urine-oral route Ref: Park 25th edition Pgno : 174,258