First step in investigating an epidemic is: September 2005

Ans. D: Verification of the diagnosis In investigating an outbreak, speed is essential, but getting the right answer is essential, too. To satisfy both requirements, epidemiologists approach investigations systematically, using the following 10 steps: Verify the diagnosis-It is the first step Establish the existence of an outbreak Defining the population at risk Define and identify cases and their characteristics Describe and orient the data in terms of time, place, and person Develop hypotheses Evaluate hypotheses Evaluation of ecological factors Fuher investigation of populato at risk Writing repo/ Communicate findings The steps are presented here in conceptual order. In practice, however, several may be done at the same time, or they may actor be done in a different order. For example, control measures should be implemented as soon as the source and mode of transmission are known, which may be early or late in any paicular outbreak investigation.