Although the Salmonella Surveillance Program of the United States Public Health Service suggests a greater incidence of salmonellosis than is apparent from standard morbidity reports,1 the upward trend over the past two decades is real. Whereas the number of cases of typhoid fever reported annually in the United States decreased from 3,268 in 1946 to 608 in 1962, the number of cases of other diseases due to salmonellae increased thirteenfold from 723 in 1946 to 9,680 in 1962.2 The striking improvement in typhoid cases has been attributed to better sanitation, improved water supplies, pasteurized milk, typhoid vaccine,3 and the more efficient management of carriers. On the other hand, these measures have had little beneficial effect on other salmonelloses. On the contrary, modern mass processing and bulk distribution of egg, meat, and poultry products have widely disseminated foodborne salmonella infections. Furthermore, the establishment of person-to-person cycles, as in
KOUGH RH, SCICCHITANO DC, SMULL CE. Salmonellosis in a Rural Pennsylvania Hospital: Observations in 100 Consecutive Cases. Arch Intern Med. 1965;116(4):548–553. doi:10.1001/archinte.1965.03870040062013
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