Cryptosporidiosis 2002

Table 1. Cryptosporidiosis Cases by Race and Sex, Indiana, 2002

  2002 1998-2002
Cases Rate* Cases
Total 71 1.15 345
   White 55 1.00 224
   Black 3 .57 18
   Other 2 1.31 10
   Not Reported 11   93
   Male 32 1.06 153
   Female 39 1.24 185
   Not Reported 0   7

*Rate per 100,000 population based on the U.S. Census Bureau’s population data as of July 1, 2002

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 2002, 71 cases of cryptosporidiosis were reported in Indiana, for a rate of 1.2 cases per 100,000 population (Table 1). This represents a significant decrease from 2001 and approximates the number of cases reported in 2000. Figure 1 shows the number of reported cases each year for 1998-2002. Disease incidence was greatest during the late summer months (Figure 2). As shown in Figure 3, age-specific rates were greatest for preschoolers aged 1-4 years (4.4), followed by children aged 5-9 years (1.8) and young adults aged 20-29 years (1.8). Females (1.2) were slightly more likely to be reported than males (1.1). The rate for other races (1.3) was higher than that for whites (1.0) and blacks (0.6); however, 11 cases (15%) did not report race data.

The incidence rates were highest among the following counties reporting five or more cases: Porter (10.0), Tippecanoe (4.6), and Allen (1.5). Figure 4 shows counties reporting five or more cases of cryptosporidiosis in 2002. There were no outbreaks of cryptosporidiosis reported in Indiana in 2002.

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