Molecular epidemiology of Orientia tsutsugamushi from outbreak regions, Madhya Pradesh, central India
Loading...
Date
2022-04
Journal Title
Journal ISSN
Volume Title
Publisher
Wolters Kluwer – Medknow
Abstract
Scrub typhus is a seriously neglected life threatening disease in Asia and the islands of the Pacific and Indian oceans. The causative agent is Orientia tsutsugamushi, an obligate intra-cytosolic bacterium transmitted to vertebrate animals such as human or rodent by larval trombiculid mites (chiggers). Here, we conducted an outbreak investigation in Madhya Pradesh state in central India after sudden upsurge in scrub typhus cases and mortality in humans. Sixty-five live traps were placed for capturing the rodents. The captured rodent species were identified and the samples were subjected to nested PCR targeting 56kDa TSA gene. Analysis revealed for the first-time predominant circulation of Karp genotype in this region. The vector species involved in transmission is Leptotrobidium deliense. In conclusion, we reported the circulation of Karp strain in outbreak regions of Madhya Pradesh and suggest that public health monitoring and surveillance needs to be improved. Studies on antigenic diversity, association of strains with clinical spectrum and pathogenicity in the local setup will be essential for development of region-specific diagnostics and vaccines.
Description
Keywords
Central India, Leptotrobidium spp, Oreintia tsutsugamushi, Rodents, Polymerase chain reaction, Scrub typhus
Citation
Manjunathachar HV, Tiwari Prakash, Raut CG, Singh Shailendra K, Das Aparup. Gamma radiation induced changes in expression of heat shock proteins (Hsc70 and Hsp83) in the dengue vector Aedes aegypti (L.). Journal of Vector Borne Diseases . 2022 Apr; 59(2): 182-185