True about carriers ?: (A) Infection with clinical symptoms, (B) Serves as source of infection, (C) More infectious than cases, (D) Less dangerous than cases
Answer is B. Ans. is 'b' i.e., Serves as source of infection A carrier is defined as "an infected person or animal that harbours a specific infectious agent in the absence of clinical disease and serves as a potential source of infection". As a rule carriers are less infectious than cases, but epidemiologically they are more dangerous than cases because they escape recognition, and continuing as they do to live a normal life among the population or comunity, they readily infect the susceptible individuals over a wider area and longer period of time.