| BRIEF COMMUNICATION
|Year : 2019 | Volume
| Issue : 4 | Page : 584-586
Assessment of two immunoassays for detection of IgM antibodies to scrub typhus using a serum panel
Divyaa Elangovan1, Susmitha Perumalla1, Winsley Rose2, Valsan Philip Verghese2, Joy Mammen3, MS Gowri4, John Antony Jude Prakash1
1 Department of Clinical Microbiology, Christian Medical College, Vellore, Tamil Nadu, India
2 Department of Child Health-III, Christian Medical College, Vellore, Tamil Nadu, India
3 Department of Clinical Pathology, Christian Medical College, Vellore, Tamil Nadu, India
4 Department of Biostatistics, Christian Medical College, Vellore, Tamil Nadu, India
Laboratory tests are necessary for diagnosis of scrub typhus (ST) especially in the absence of the distinctive eschar. Performance of an ELISA and ICT (immunochromatography) to detect IgM antibodies to scrub typhus was assessed using a panel of 346 sera chosen from healthy individuals, those with scrub typhus and scrub-typhus like illness. A sensitivity of 98.7% for ST IgM ICT and 97.4% for ST IgM ELISA was observed while specificity was 96.3% for ICT and 95.9% for ELISA. As excellent concordance (98.8%) was noted between the two assays, IgM ICT can be used for rapid diagnosis of scrub typhus.
Abbreviations: ST IgM ELISA: Scrub typhus IgM ELISA; ST IgM ICT: Scrub Typhus IgM Immunochromatography, Rapid diagnostic test: RDT.
Dr. John Antony Jude Prakash
Department of Clinical Microbiology, Christian Medical College, 8th Floor, Asha Building, Vellore, Tamil Nadu
Source of Support: None, Conflict of Interest: None
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