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Figure 1 | BMC Infectious Diseases

Figure 1

From: Legionnaires’ disease case-finding algorithm, attack rates, and risk factors during a residential outbreak among older adults: an environmental and cohort study

Figure 1

Decision algorithm for Legionnaire’s disease case-finding and classification. * The decision courses based on interview data (left) and medical records (right) are not necessarily mutually exclusive. Information for some subjects was gathered in both tracts.  Data from patient interview.  Data from medical records review § Suspect cases: a resident identified by case-finding who has entered the decision algorithm because his/her illness is to be evaluated as a case of Legionnaire’s disease; resident’s illness remains a suspect case until further categorized.  Physicians reviewed available medical records for signs, symptoms, and diagnostic testing (e.g., chest x-ray) to determine if subject possibly had pneumonia consistent with Legionnaire’s disease. # Possible case: a subject whose illness has met all the criteria of a suspect case is labeled a possible case while outstanding information or testing is collected.

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