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Salmonella surveillance report ; no. 34, FEBRUARY 26, 1965
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Salmonella surveillance report ; no. 34, FEBRUARY 26, 1965
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    For the Month of January 1965

    During January, 1,538 human isolations of salmonellae were reported. The average number of isolations per week, 385, was an increase of 41 over the figure for December 1964 (Figure 1).

    A total of 538 nonhuman isolations were reported during January for an increase of 194 over December.

    In the past, several factors have made it impossible to obtain accurate information on the annual incidence, seasonal variation, and geographical pattern of infection with Salmonella typhi in the United States. Previously, there was no uniform method of reporting routine S. typhi isolations from known carriers as distinct from isolations from presumptive clinical cases on the weekly salmonella surveillance forms. It has been estimated that between one quarter and one-third of the total reported isolations of S. typhi represent routine culturing of known typhoid carriers. Recently the State and Territorial Epidemiologists and Laboratory Directors approved a plan whereby isolations of j>. typhi will be reported as (1) case, (2) carrier or (3) status unknown. These data should result in more accurate epidemiological information on the status of S>. typhi in the United States today. With this issue, Table VII, summarizing the reported isolations of S. typhi by patient's status is initiated; it will be continued in subsequent issues of the Salmonella Surveillance Report.

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