Comparison of a rapid diagnostic test and microimmunofluorescence assay for detecting antibody to Orientia tsutsugamushi in scrub typhus patients in China
Asian Pacific Journal of Tropical Medicine
;
(12): 666-668, 2011.
Article
in English
| WPRIM
| ID: wpr-820076
ABSTRACT
OBJECTIVE@#To evaluate the detection of IgM and IgG antibodies to Orientia tsutsugamushi (O. tsutsugamushi) by rapid diagnostic test (RDT) and microimmunofluorescence assay (mIFA).@*METHODS@#RDT using a mixture of recombinant 56-kDa proteins of O. tsutsugamushi and mIFA assay were performed on 20 patients from Fujian and 13 patients from Yunnan Province, and 82 sera samples from healthy farmers in Anhui Province and Beijing City in 2009. Comparison of the RDT and mIFA assay was performed by using X(2) test and the P level of <0.05 was considered to be significance.@*RESULTS@#Among these 82 normal sera samples, the specificity of RDT was 100% for both IgM and IgG tests. In 33 samples from patients with scrub typhus, 5 cases were positively detected earlier by RDT than by mIFA in IgM test, and 2 cases were positive in IgG test. Sensitivities of RDT were 93.9% and 90.9% for IgM and IgG, respectively. The sensitivity of combination test of IgM and IgG was 100%. Geometric mean titer diluted sera from confirmed cases by IFA and RDT assay were 137 vs. 1113 (P<0.001) in IgM test and 199 vs. 1279 (P<0.05) in IgG test.@*CONCLUSIONS@#RDT is more sensitivite than mIFA in the early diagnosis of scrub typhus and it is particularly applicable in rural areas.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pathology
/
Orientia tsutsugamushi
/
Bacterial Proteins
/
Blood
/
Recombinant Proteins
/
Immunoglobulin G
/
Immunoglobulin M
/
Scrub Typhus
/
China
/
Sensitivity and Specificity
Type of study:
Diagnostic study
/
Screening study
Limits:
Adolescent
/
Adult
/
Aged
/
Child
/
Female
/
Humans
/
Male
Country/Region as subject:
Asia
Language:
English
Journal:
Asian Pacific Journal of Tropical Medicine
Year:
2011
Type:
Article
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