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Seroprevalence of Scrub typhus at a tertiary care hospital in Andhra Pradesh.
Indian J Med Microbiol. 2015 Jan-Mar; 33(1):68-72.IJ

Abstract

INTRODUCTION

Scrub typhus is a rickettsial infection which is caused by Orientia tsutsugamushi and transmitted by the bite of the chigger of a mite. Delay in diagnosis can be fatal otherwise the treatment is simple, doxycycline being the drug of choice. Indirect immunoflurescence is considered gold standard but it is not used in India as it is costly and also not available. There is need for rapid, economic and simple test for the diagnosis of scrub typhus. This study was taken up to study the seroprevalence of scrub typhus in Andhra Pradesh and to compare two commonly used serological methods; rapid test and IgM ELISA.

MATERIALS AND METHODS

This is a prospective study in which 100 serum samples from clinically suspected cases collected over a period of 3 months were processed for the detection of IgM antibodies for scrub typhus by ELISA and Rapid test. Samples were also tested for leptospirosis and dengue fever which the other common causes of fever prevalent in this region.

RESULTS

Total number of samples processed was 100 of which 52 were males and 48 females. Among the hundred samples 39 were seropositive. Positivity was higher in the age group of patients between 16 and 30 yrs of age. There was 97% correlation between ELISA and rapid method. Of the 100 samples only three samples positive by ELISA were negative by rapid method. Fever was the most common manifestation and there was no eschar and no mortality reported.

CONCLUSION

Scrub typhus should be included in the differential diagnosis of fever of unknown origin along with dengue, malaria and leptospirosis which are the other common endemic infections in this part of the country.

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  • Publisher Full Text

    • Authors+Show Affiliations

    Ramyasree A
    No affiliation info available
    Kalawat U
    Department of Microbiology , Sri Venkateswara Institute of Medical Sciences, Tirupati, Andhra Pradesh, India.
    Rani ND
    No affiliation info available
    Chaudhury A
    No affiliation info available

    MeSH

    AnimalsAntibodies, BacterialHumansImmunoglobulin MIndiaOrientia tsutsugamushiScrub TyphusSeroepidemiologic StudiesSerologic TestsTertiary Care Centers

    Pub Type(s)

    Comparative Study
    Journal Article

    Language

    eng

    PubMed ID

    25560004

    Citation

    Ramyasree, A, et al. "Seroprevalence of Scrub Typhus at a Tertiary Care Hospital in Andhra Pradesh." Indian Journal of Medical Microbiology, vol. 33, no. 1, 2015, pp. 68-72.
    Ramyasree A, Kalawat U, Rani ND, et al. Seroprevalence of Scrub typhus at a tertiary care hospital in Andhra Pradesh. Indian J Med Microbiol. 2015;33(1):68-72.
    Ramyasree, A., Kalawat, U., Rani, N. D., & Chaudhury, A. (2015). Seroprevalence of Scrub typhus at a tertiary care hospital in Andhra Pradesh. Indian Journal of Medical Microbiology, 33(1), 68-72. https://doi.org/10.4103/0255-0857.148381
    Ramyasree A, et al. Seroprevalence of Scrub Typhus at a Tertiary Care Hospital in Andhra Pradesh. Indian J Med Microbiol. 2015;33(1):68-72. PubMed PMID: 25560004.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Seroprevalence of Scrub typhus at a tertiary care hospital in Andhra Pradesh. AU - Ramyasree,A, AU - Kalawat,U, AU - Rani,N D, AU - Chaudhury,A, PY - 2015/1/7/entrez PY - 2015/1/7/pubmed PY - 2016/3/25/medline SP - 68 EP - 72 JF - Indian journal of medical microbiology JO - Indian J Med Microbiol VL - 33 IS - 1 N2 - INTRODUCTION: Scrub typhus is a rickettsial infection which is caused by Orientia tsutsugamushi and transmitted by the bite of the chigger of a mite. Delay in diagnosis can be fatal otherwise the treatment is simple, doxycycline being the drug of choice. Indirect immunoflurescence is considered gold standard but it is not used in India as it is costly and also not available. There is need for rapid, economic and simple test for the diagnosis of scrub typhus. This study was taken up to study the seroprevalence of scrub typhus in Andhra Pradesh and to compare two commonly used serological methods; rapid test and IgM ELISA. MATERIALS AND METHODS: This is a prospective study in which 100 serum samples from clinically suspected cases collected over a period of 3 months were processed for the detection of IgM antibodies for scrub typhus by ELISA and Rapid test. Samples were also tested for leptospirosis and dengue fever which the other common causes of fever prevalent in this region. RESULTS: Total number of samples processed was 100 of which 52 were males and 48 females. Among the hundred samples 39 were seropositive. Positivity was higher in the age group of patients between 16 and 30 yrs of age. There was 97% correlation between ELISA and rapid method. Of the 100 samples only three samples positive by ELISA were negative by rapid method. Fever was the most common manifestation and there was no eschar and no mortality reported. CONCLUSION: Scrub typhus should be included in the differential diagnosis of fever of unknown origin along with dengue, malaria and leptospirosis which are the other common endemic infections in this part of the country. SN - 1998-3646 UR - https://www.unboundmedicine.com/medline/citation/25560004/Seroprevalence_of_Scrub_typhus_at_a_tertiary_care_hospital_in_Andhra_Pradesh_ L2 - http://www.ijmm.org/article.asp?issn=0255-0857;year=2015;volume=33;issue=1;spage=68;epage=72;aulast=Ramyasree DB - PRIME DP - Unbound Medicine ER -