*Rate per 100,000 population based on the U.S. Census Bureau’s population data as of July 1, 2004
Listeriosis is caused by eating food contaminated with the bacterium Listeria monocytogenes. The disease can be transmitted through soil and water and has been found in a variety of raw foods such as uncooked meats, vegetables, and dairy products. Animals can carry the bacterium without appearing ill. This rare infection affects mostly pregnant women, newborns, and children and adults with weakened immune systems. Symptoms of listeriosis include nausea, diarrhea, fever, and muscle aches. If the infection spreads to the nervous system, headache, stiff neck, confusion and/or convulsions may occur.
In 2004, 18 cases of listeriosis were reported in Indiana, indicating a rate of less than 1 case per 100,000 population (Table 1). Figure 1 shows reported listeriosis cases by year for 2000-2004. Incidence of disease was greatest during the spring and summer months (Figure 2). As shown in Figure 3, age-specific rates were greatest for infants less than
1 year of age (2.32), followed by older adults 80+ years of age (2.25). Sixteen counties reported having at least one listeriosis case in 2004; however, no county had five or more reported cases. There were no outbreaks of listeriosis reported in Indiana in 2004.
You can learn more about listeriosis by visiting the following Web site: