Population-Based Incidence of Human Granulocytic Ehrlichiosis in Northwestern Wisconsin, 1997–1999

The incidence of human granulocytic ehrlichiosis (HGE) in the upper Midwest is uncertain. Active surveillance for suspected HGE was conducted from 1997 through 1999 in a 13-county region of northwestern Wisconsin. Suspected HGE cases were classified, according to the national case definition, as con...

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Published inThe Journal of infectious diseases Vol. 184; no. 11; pp. 1470 - 1474
Main Authors Belongia, Edward A., Gale, Craig M., Reed, Kurt D., Mitchell, Paul D., Vandermause, Mary, Finkel, Michael F., Kazmierczak, James J., Davis, Jeffrey P.
Format Journal Article
LanguageEnglish
Published Chicago, IL The University of Chicago Press 01.12.2001
University of Chicago Press
Oxford University Press
Subjects
Adolescent
Adult
Age Factors
Aged
Anaplasma phagocytophilum
Antibodies
Bacterial diseases
Biological and medical sciences
Child
Child, Preschool
Concise Communications
Ehrlichia
Ehrlichiosis
Ehrlichiosis - diagnosis
Ehrlichiosis - epidemiology
Female
Human bacterial diseases
Human viral diseases
Humans
Incidence
Infant
Infant, Newborn
Infections
Infectious diseases
Lyme disease
Lyme Disease - diagnosis
Lyme Disease - epidemiology
Male
Medical sciences
Middle Aged
Patient surveillance
Physicians
Polymerase chain reaction
Public health
Rickettsial diseases
Sampling Studies
Surveillance
Tropical bacterial diseases
Viral diseases
Viral diseases of the lymphoid tissue and the blood. Aids
Wisconsin - epidemiology
United States
North America
Wisconsin
America
Connecticut
USA, Wisconsin
Human
Age
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Summary:The incidence of human granulocytic ehrlichiosis (HGE) in the upper Midwest is uncertain. Active surveillance for suspected HGE was conducted from 1997 through 1999 in a 13-county region of northwestern Wisconsin. Suspected HGE cases were classified, according to the national case definition, as confirmed, probable, or not HGE. In total, 112 confirmed cases and 30 probable cases of HGE were identified. The median age of the 142 case patients was 56 years, and 92 (65%) were male; 111 (78%) were residents of the surveillance region. The mean annual incidence of confirmed and probable HGE was 9.3 cases per 100,000 residents; there was no increase from 1997 to 1999. The incidence was highest among persons ⩾50 years old and residents of Washburn County. The incidence of HGE in this region exceeded prior estimates, but it was lower than the reported incidence in areas of endemicity in Connecticut
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ISSN:0022-1899
1537-6613
DOI:10.1086/324517