NOTE: The term infection refers to a primary infection that leads to disease.
aProbability calculated as percentage of acute cases. Frequent, >50% of cases; common, >5-50% of cases; rare, 1-5% of cases; very rare, <1% of cases.
bDelay defined as adverse health outcome not evident at time of acute illness.
cReported in military personnel in Gulf War, Operation Enduring Freedom, or Operation Iraqi Freedom as of December 2005.
dPostinfection enteropathy: syndrome of chronic or intermittent diarrhea and/ or constipation that follows elimination of previous infectious enteropathy; poorly defined etiology and pathogenic mechanism; often self- limited over months to years.
SOURCE: GIDEON 2006; Heymann 2004; Mandell et al. 2005; Nester et al. 2004; Wilson 1991.