Comparison of Indirect Immunofluorescence Assays for Diagnosis of Scrub Typhus and Murine Typhus Using Venous Blood and Finger Prick Filter Paper Blood Spots

Title
Comparison of Indirect Immunofluorescence Assays for Diagnosis of Scrub Typhus and Murine Typhus Using Venous Blood and Finger Prick Filter Paper Blood Spots
Authors
Phetsouvanh, R; Blacksell, SD; Jenjaroen, K; Days, NPJ; Newton, PN
Keywords
FLUORESCENT ANTIBODY TEST; DRIED BLOOD; LABORATORY DIAGNOSIS; RICKETTSIAL DISEASES; FEBRILE ILLNESS; SCHISTOSOMIASIS; THAILAND; IGG
Issue Date
2009
Publisher
AM J TROP MED HYG
Citation
Am. J. Trop. Med. Hyg.;MAY;2009;80;5
Abstract
We performed indirect immunofluorescence assays (IFAs) to compare levels of IgM and IgG antibodies to Orientia tsutsugamushi and Rickettsia typhi in admission-phase serum samples and filter paper blood spots (assayed immediately and stored at 5.4 degrees C and 29 degrees C for 30 days) collected oil the same day from 53 adults with suspected scrub typhus and murine typhus admitted to Mahosot Hospital Vientiane, Lao People's Democratic Republic. The sensitivities and specificities of admission-phase filter paper blood spots in comparison to paired sera were between 91% and 95% and 87% and 100%, respectively, for the diagnosis of scrub typhus and murine typhus. The classification of patients as having or not having typhus did not significantly differ after storage of the blood spots for 30 days (P > 0.4) at 5.4 degrees C and 29 degrees C. Because filter paper blood samples do not require sophisticated and expensive storage an transport, they may be an appropriate specimen collection technique for the diagnosis of rickettsial disease in the rural tropics.
URI
http://hdl.handle.net/11267/2420
ISSN
0002-9637
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5.Mahosot Hospital > Journal articles
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