The etiologic agent of the disease must be first identified. The most important thing to know is the source of the organism. Transmission of the disease must be identify to prevent further spread and limit the number of persons with the disease.The route,mode of transmission should be identified. Quarantine of those infected and symptomatic can be done if necessary. The initiation of treatment must be started once infection is identified. Prophylaxis can also given to those individual at risk of acquiring the disease.