2005 - Ehrlichiosis

Table 1. Ehrlichiosis Cases by Race and Sex, Indiana, 2005

  2005 2001-2005
Cases Rate* Cases
Total 2 0.03 18
Race
   White 2 0 16
   Black 0 0 0
   Other 0 0 0
   Not Reported 0 - 2
Sex
   Male 2 0.06 11
   Female 0 0 7

*Rate per 100,000 population based on the U.S. Census Bureau’s   population data as of July 1, 2005

Human Monocytic Ehrlichiosis (HME) is caused by the bacteria Ehrlichia chaffeensis and is transmitted to humans by the lone star tick, Amblyomma americanum. Human Granulocytic Ehrlichiosis (HGE) is caused by the bacteria Anaplasma phagocytophilum and is transmitted to humans by the deer tick, Ixodes scapularis.

From 2001-2005, 18 cases of ehrlichiosis were reported in Indiana: 16 cases of HME and 2 cases of HGE. There were two reported cases of ehrlichiosis in 2005 in Indiana. Figure 1 shows the number of reported cases by year for 2001-2005.

All cases of HME occurred in residents of Southwestern Indiana counties, where the lone star tick is most prevalent. All cases for which race was reported were white.

You can learn more about ehrlichiosis by visiting the following Web site:
http://www.cdc.gov/ncidod/dvrd/ehrlichia/Index.htm.