This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Healthy carriers are present in all except ? 
Select and explain. 
A. Typhoid, B. Cholera, C. Diphtheria, D. All
A: Typhoid
Answer: A: Typhoid 
Explanation: Ans. is 'a' i.e., Typhoid Healthy carriers Healthy carriers emerge from subclinical cases. o They are victims of subclinical infection who have developed carrier state without suffering from ove disease, but are nevehess shedding the disease agent. o Examples ---> Polio, cholera, meningococcal meningitis, salmonellosis, diphtheria. Note : Dont get confuse typhoid fever with salmonellosis. Though typhoid fever is caused by salmonella typhi, Here salmonellosis means disease caused by other salmonella species. q In Typhoid fever following types of carrier state is seen : - i) Temporary carriers" v:shapes="_x0000_s1026">Incubatory carrier ii) Convalescent carrier ii) Chronic carriers