About 150 cases of typhoid have recently occurred throughout six midwestern states. Months of intensive investigation have failed to reveal the source of the infection. During 1955, more than 5,000 persons were reported ill due to salmonellosis. Incidents of food poisoning, especially attributed to Salmonella, appear to be on the increase; but it is obvious that such an increase represents only those outbreaks and cases that have been officially reported, implying the measured growth of cases is only a portion of what probably is occurring.
Sir William Savage, in discussing the marked increase of Salmonella food poisoning in Great Britain,1 points out that no outbreak of this type can be fully explained, thereby preventing future incidents, unless four factors are solved. These are (1) the bacterial or other cause of the symptoms, (2) the vectors responsible for conveying the causal agent to man, (3) the reservoir from which the infecting
SALMONELLA FOOD POISONING. JAMA. 1957;163(4):263. doi:10.1001/jama.1957.02970390039015
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