2004 Indiana Report of Infectious Diseases |
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*Rate per 100,000 population based on the U.S. Census Bureau’s population data as of July 1, 2004 |
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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:
http://www.cdc.gov/ncidod/dpd/parasites/cryptosporidiosis/factsht_cryptosporidiosis.htm.
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