Cryptosporidiosis 2004

Table 1. Cryptosporidiosis Cases by Race and Sex, Indiana, 2004

  2004 2000-2004
Cases Rate* Cases
Total 79 1.27 441
   White 60 1.09 329
   Black 2 0.36 17
   Other 2 1.25 15
   Not Reported 15 - 80
   Male 38 1.24 205
   Female 41 1.29 234
   Not Reported 0 - 2

*Rate per 100,000 population based on the U.S. Census Bureau’s population data as of July 1, 2004

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 2004, 79 cases of cryptosporidiosis were reported in Indiana, for a rate of 1.27 cases per 100,000 population. This represents a marked decrease from 2003. Figure 1 shows the number of reported cases each year for 2000-2004. Disease incidence was greatest during the summer and winter months (Figure 2). As shown in Figure 3, age-specific rates were greatest for children aged 5-9 years (2.74), followed by adults aged 30-39 (1.66), and adults aged 50-59 (1.57). Females (1.29) were slightly more likely to be reported than males (1.24). The rate for other races (1.25) was higher than that for whites (1.09) and blacks (0.36); however, 15 cases (19%) did not report race data.

The incidence rates were highest among the following counties reporting five or more cases:
Porter (8.4), Tippecanoe (4.6), and Allen (2.9). Figure 4 shows counties reporting five or more cases of cryptosporidiosis in 2004. There were no outbreaks of cryptosporidiosis reported in Indiana in 2004.

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