The number of cases of Salmonellosis (Figure 1.3) had been steadily rising since 1997 and peaked at 108 cases in 2007. The vast majority of reported Salmonella infections were individual cases. The number of cases (73) and the incidence rate for Jefferson County (11.0/100,000) in 2010 greatly exceeds the 2010 national target of 6.8 cases per 100,000 population. It is suspected that the actual Salmonella rates in Jefferson County have remained relatively stable over the past three years and that some portion of the increase observed in 2007 reflected an increased number of stool cultures performed in response to Shigella outbreaks. The decrease in the number of stool samples cultured since 2008 may also contribute to in the number of cases identified.
Shigellosis
The large increases in the number of cases and resulting rates of Shigellosis in 2001, 2004, 2007 and 2008 reflect outbreaks in childcare facilities (Figures 1.4, 1.5). In each of these years, several childcare facility-related outbreaks were documented throughout Jefferson County. Although the number of daycare associated outbreaks decreased from 11 in 2007 to 2 in 2010, the average number of children affected per outbreak rose from 5 to 12 within the same timeframe.
Campylobacteriosis
From 1998 through 2005, the number of cases of Campylobacteriosis remained fairly stable. There was a slight increase from 2005 through 2007, from which point the rates have again stabilized at a slightly higher rate (Figure 1.7).
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