Annual Summary of Disease Activity:
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Haemophilus influenzae Invasive Disease, 2000
Fifty-two cases of invasive Haemophilus influenzae disease were reported in 2000 (1.1 per 100,000 population). Cases ranged in age from less than 1 day to 98 years, with a median age of 68 years. Seventeen (33%) cases had pneumonia, 26 (50%) had bacteremia without another focus of infection, four (8%) had meningitis, and five (9%) had other conditions. Thirteen (25%) deaths were reported among these cases.
Three (6%) cases were known to be type b (Hib), compared to five cases in 1999 and two cases in 1998. All of the Hib cases reported in 2000 occurred in adults with underlying medical conditions. Two cases had bacteremia without another focus of infection, and one had pneumonia; one patient with bacteremia survived.
Twenty-eight (54%) cases had untypeable isolates; three (6%) were type e; two (4%) were type f; one (2%) was type c, and 15 (29%) isolates were not available for testing at MDH.
The 13 deaths occurred in patients ranging in age from 41 to 98 years. Nine cases presented with pneumonia and four with bacteremia without another focus of infection. All 13 cases had H. influenzae isolated from blood. Ten were known to have underlying medical conditions. Isolates from six of the deaths were untypeable; two were type b; one was type f; one was type c, and three isolates were not available at MDH for serotyping.
- For up to date information see>> Haemophilus influenzae (invasive disease)
- Full issue>> Annual Summary of Communicable Diseases Reported to the Minnesota Department of Health, 2000