Shigellosis, 2006

Introduction, 2006

Table 1: List of Reportable Diseases, 2006

Table 2: Cases of Selected Communicable Diseases Reported, 2006

During 2006, 259 culture-confirmed cases of Shigella infection (5.0 per 100,000) were reported (Figure 2). This represents a 270% increase from the 96 cases reported in 2005, and a 17% increase from the median number of cases reported annually from 1999 to 2005 (median, 222 cases, range, 68 to 904).

Image of figure 2.

In 2006, S. sonnei accounted for 227 (88%) cases, S. fl exneri for 24 (9%), and S. boydii for four (2%). Case-patients ranged in age from 8 months to 96 years (median, 10 years). Fifty-one percent of case-patients were less than 10 years of age; children less than 5 years of age accounted for 23% of cases. Thirty-six (14%) case-patients were hospitalized. Eighty-three percent of case-patients resided in the metropolitan area, including 32% in Anoka County and 31% in Hennepin County.

Five outbreaks of shigellosis were identified in 2006; four were caused by S. sonnei and one was caused by S. boydii. These outbreaks resulted in 72 culture-confirmed cases (representing 28% of reported Shigella cases). Four person–to-person outbreaks occurred in a variety of settings, including one in a daycare facility, one in a women’s shelter, one in an elementary school, and one at a private party. One foodborne outbreak also occurred and was associated with a restaurant in which several workers had recently been ill.

Every tenth Shigella isolate received at MDH was tested for antimicrobial resistance. Thirty-four isolates were tested in 2006; 74% were resistant to ampicillin, 29% were resistant to trimethoprim-sulfamethoxazole, and 6% were resistant to both ampicillin and trimethoprim-sulfamethoxazole. All isolates tested were susceptible to ceftriaxone.

Updated Monday, 12-Aug-2013 11:57:23 CDT