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Volume 2, Number 3—July 1996

Dispatch

An Outbreak of Spotted Fever Rickettsiosis in U.S. Army Troops Deployed to Botswana

Bonnie L. Smoak*, J. Bruce McClain‡, John F. Brundage*, Laurel Broadhurst*, Daryl J. Kelly†§, Gregory A. Dasch§, and Richard N. Miller*
Author affiliations: *Divisions of Preventive Medicine and †Communicable Diseases and Immunology, Walter Reed Army Institute of Research, Washington, D.C., USA; ‡U.S. Army MEDDAC, Vicenza, Italy; §Viral and Rickettsial Diseases Program, U.S. Naval Medical Research Institute, Bethesda, Maryland, USA

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Table

Symptoms of case-patients and non–case-patients during a spotted fever outbreak.

Symptoms Case–patients;
n=32(%) Non–case-patients;
n=107(%) Risk
ratio 95% Confidence
interval
Fever 19 (59) 8 (7) 6.06 3.44,10.68
Chills 25 (78) 6 (6) 12.44 5.96,26.00
Headache 23 (72) 8 (7) 8.90 4.61,17.21
Muscle ache 26 (81) 10 (9) 12.40 5.56,27.66
Joint pain 21 (66) 9 (8) 6.94 3.78,12.73
Fatigue 27 (84) 6 (6) 17.35 7.26,41.43
Lymphadenitis 27 (84) 3 (3) 19.62 8.27,46.57
Abdominal pain 9 (28) 4 (4) 3.79 2.26,6.36
Anorexia 11 (34) 3 (3) 4.68 2.90,7.53
Nausea/vomiting 13 (41) 3 (3) 5.26 3.27,8.46
Diarrhea 7 (22) 21 (20) 1.11 0.54,2.30
Cough 4 (12) 9 (8) 1.38 0.58,3.33
Nasal congestion 7 (22) 17 (16) 1.34 0.66,2.74
Sore throat 6 (19) 16 (15) 1.23 0.57,2.63

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