Cholera prophylaxis is by -: (A) Doxycycline 300mg OD, (B) Cephalosporin, (C) Streptomycin, (D) Cotrimoxazole
Answer is A. A single oral dose of doxycycline (300mg for adults and 6mg/kg for children under 15 years) has proved to be effective for chemoprophylaxis of cholera. Ref: PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition , Page 233