2005 - Hepatitis A

Hepatitis A

Table 1. Hepatitis A Cases by Race and Sex, Indiana, 2005

  2005 2001-2005
Cases Rate* Cases
Total 23 0.37 283
Race
   White 19 0.34 208
   Black 1 0.18 11
   Other 0 0 16
   Not Reported 3 - 48
Sex
   Male 11 0.36 156
   Female 11 0.35 124
   Not Reported 1 - 3
*Rate per 100,000 population based on the U.S. Census Bureau’s population data as of July 1, 2005

Hepatitis A is a viral infection of the liver transmitted most commonly by fecal-oral contact from contaminated food or water, or from person to person via contaminated hands or oral-anal contact. Hepatitis A virus infects primarily humans.

In 2005, 23 cases of hepatitis A were reported in Indiana for a rate of less than 1 case per 100,000 population (Table 1). This represents a decrease from 2004 (0.58). Figure 1 shows the number of reported cases per year for 2001-2005. The number of reported cases was highest during the spring and fall months (Figure 2). Figure 3 shows age-specific rates were greatest for infants under the age of 1 (1.16) and preschoolers aged 1-4 years (1.16), followed by adults aged 80 years and older (0.88). Females (0.35) were just as likely to be reported as males (0.36). The rate for whites (0.34) was higher than that for blacks (0.18); however, three cases (13%) did not report race data.

In 2005, 11 Indiana counties reported cases of hepatitis A, but only Marion County reported 5 or more cases for an incidence rate of less than 1 case per 100,000 population.

There was one outbreak of hepatitis A infection reported in Indiana in 2005. In September, a hepatitis A outbreak occurred among individuals attending a family reunion in LaGrange County. Of the 32 known persons that attended the family reunion, 17 agreed to be interviewed. Three cases were laboratory confirmed, and six cases were epidemiologically linked. The cause of the outbreak was not determined.

You can learn more about hepatitis A by visiting the following Web site:
http://www.cdc.gov/ncidod/diseases/hepatitis/a/index.htm