<prompt> The drug of choice for chemoprophylaxis in contacts of a patient of penumonic plague is -PenicillinRifampicinErythromycinTetracycline  <response>: Ans. is d i.e., Tetracycline Chemoprophylaxis o Chemoprophylaxis refers to the administration of a drug for the purpose of preventing disease or infection. Indications for chemoprophylaxis Disease Chemoprophylaxis Cholera Tetracycline or furazolidone for house-hold contacts Conjuncitivitis Erythromycin ophthalmic ointment Diphtheria Erythromycin and first dose of vaccine Influenza Amantadine effective only for type A for contacts suffering from chronic diaeases Malaria Chloroquine Meningitis Sulphadiazine for 4 days only meningococcal if the strain is shwon to be non-resistant, for household and close community contacts; immunization should be initiate in all cases against serogrops A, and C. However, now rifampicin is the DOC for chemoprophylaxis. Plague Tetracycline for contacts of pneumonic plague 