2005 - Cryptosporidiosis


Table 1. Cryptosporidiosis Cases by Race and Sex, Indiana, 2005

  2005 2001-2005
Cases Rate* Cases
Total 94 1.50 461
   White 66 1.19 346
   Black 2 0.36 18
   Other 5 3.07 18
   Not Reported 21 - 79
   Male 39 1.26 208
   Female 55 1.73 251
   Not Reported 0 - 2

*Rate per 100,000 population based on the U.S. Census Bureau’s   population data as of July 1, 2005

Cryptosporidiosis is a parasitic infection usually transmitted by fecal-oral contact, most commonly through contaminated water. Other routes of transmission include foodborne, person to person, and animal to person. Outbreaks have been associated with contaminated drinking water, recreational water venues, consumption of unpasteurized apple cider, and daycare centers. Populations at most risk of developing severe infection include young children, the elderly, and those with weakened immune systems.

In 2005, 94 cases of cryptosporidiosis were reported in Indiana, for a rate of 1.50 cases per 100,000 population. This represents an 18 percent increase from 2004 (1.27). Figure 1 shows the number of reported cases each year for 2001-2005. Disease incidence was greatest during the summer and early fall months (Figure 2). As shown in Figure 3, age-specific rates were greatest for preschoolers aged 1-4 years (3.78), followed by children aged 5-9 (3.42), and infants less than 1 year of age (2.32). Females (1.73) were slightly more likely to be reported than males (1.26). The rate for other races (3.07) was higher than that for whites (1.19) and blacks (0.36); however, 21cases (22%) did not report race data.

The incidence rates were highest among the following counties reporting five or more cases:
Dearborn (30.6), Noble (10.5), Allen (3.2), and Porter (3.2). Figure 4 shows counties reporting five or more cases of cryptosporidiosis in 2005. There were no outbreaks of cryptosporidiosis reported in Indiana in 2005.

You can learn more about cryptosporidiosis by visiting the following Web site: