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Volume 11, Number 4—April 2005

Dispatch

Human Spotted Fever Rickettsial Infections

George B. Schoeler*1, Cecilia Morón†, Allen L. Richards‡, Patrick J. Blair§, and James G. Olson§Comments to Author 
Author affiliations: *U.S. Navy Disease Vector Ecology and Control Center, Silverdale, Washington, USA; †Ministry of Health, Lima, Peru; ‡U.S. Naval Medical Research Center, Silver Spring, Maryland, USA; and; §U.S. Naval Medical Research Center Detachment, Lima, Peru

Main Article

Table 1

EIA and IFA test results for antibodies to Rickettsia rickettsii among patients from 4 areas of Peru*

Department EIA
IFA
EIA and/or IFA
No. tested† No. positive (%)‡ No. tested† No. positive (%)§ No. tested† No. positive (%)
Cusco 36 6 (17) 56 11 (20) 67 16 (24)
Junin 42 8 (19) 19 2 (11) 53 10 (19)
Piura 50 4 (8) 0 50 4 (8)
Total 128 18 (14) 75 13 (17) 170 30 (18)

*By enzyme immunoassay (EIA) or indirect immunofluorescence antibody assay (IFA).
†Febrile patients from whom acute- and convalescent-phase serum specimens were available for testing.
‡Criterion for confirmation was a ≥4-fold increase in R. rickettsii immunoglobulin (Ig) G antibody titer from acute to convalescent phase of illness by EIA.
§Criterion for confirmation was a ≥4-fold increase in R. rickettsii IgG antibody titer from acute to convalescent phase of illness by IFA.

Main Article

1Former affiliation: U.S. Naval Medical Research Center Detachment, Lima, Peru

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