Cryptosporidiosis Surveillance --- United States, 2003--2005
Problem/Condition: Cryptosporidiosis, a gastrointestinal illness, is caused by protozoa of the genus Cryptosporidium.
Reporting Period: 2003--2005.
System Description: State and two metropolitan health departments voluntarily reported cases of cryptosporidiosis through CDC's National Notifiable Diseases Surveillance System.
Results: During 2003--2005, the total number of reported cases of cryptosporidiosis increased from 3,505 for 2003 to 3,911 for 2004 and to 8,269 for 2005. All reporting areas submitted reports, with more reports from northern states. Compared with other age groups, a greater number of case reports were received for children aged 1--9 years and adults aged 30--39 years. Peak onset of illness occurred annually during early summer through early fall.
