A person with one of these agents can spread the agent from a few days prior to symptom onset and throughout the course of active disease. A person with laboratory confirmed influenza is also considered a case even if the person doesn't have all of the above symptoms and fever. The incubation period for influenza is short, usually 1 to 3 days. Communicability includes the period immediately prior to clinical onset and throughout the course of active disease. A case of pneumonia is defined as a person with clinical symptomatology PLUS X-ray findings of pneumonia.
Pneumococcal pneumonia is characterized by a fever, chills, cough, and pleuritic pain.
The organism is spread by droplet, direct, or indirect inoculation. The incubation period may be as short as 1 to 3 days. Appropriate antibiotic therapy will render patients noninfectious within 1 to 2 days. An outbreak of acute febrile respiratory disease, influenza, or ILI is defined as 3 or more clinically defined cases or one laboratory proven case of influenza in a facility within a 7 day period. Unless indicated by laboratory results, influenza and ILI are applicable only between Oct. 1 and May 31.