Vibrio Surveillance System, Summary Data, 1997-1998
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Vibrio Surveillance System, Summary Data, 1997-1998

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    Since 1988, CDC has maintained a voluntary Vibrio Surveillance System for culture-confirmed Vibrio infections in the Gulf Coast states. Using a standardized form, investigators obtain clinical data, information about underlying illness, and epidemiologic data on seafood consumption and exposure to seawater in the week before illness. When a food item is implicated in illness, a traceback investigation is performed by state field investigators or the U.S. Food and Drug Administration (FDA). Surveillance data have been used to identify environmental risk factors, retail food outlets where high-risk exposures occur, and target groups that may benefit from consumer education.

    This letter summarizes data on both sporadic and outbreak-associated Vibrio infections reported to CDC through the Vibrio Surveillance System in 1997 and 1998. A total of 937 cases of culture-confirmed Vibrio illnesses were reported to the Vibrio Surveillance System in 1997 and 1998, 389 from 5 Gulf Coast states (Alabama, Florida, Louisiana, Mississippi, and Texas) and 548 from 26 other states and one territory (Figure 1). Among those about whom this information was available, 300 (37%) of 809 were hospitalized and 46 (7%) of 707 died. Although V. parahaemolyticus was the most frequently reported Vibrio species, V. vulnificus accounted for 41 (89%) of the 46 reported deaths.


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    Table 1: Vibrio Infections reported to CDC, by Syndrome and Complications, 1997 -- Table 2: Vibrio infections reported to CDC, by Syndrome and Complications, 1998 -- Figure 1: States that reported Vibrio infections to the Vibrio Surveillance System, 1997-1998 (N=937)* (numbers by each state indicate number of illnesses) -- Figure 2: Seasonality of Vibrio infections, 1997-1998 (N=858).
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