The survey for sentinel of vectors of scrub typhus in The Office of Prevention Disease and Control 6, Khon Kaen Province

Abstract

This survey study was looking for rodents (resevoir host) and vectors of scrub typhus in high endemic area in Khonkaen, Kalasin, Udonthani, Nongkai, Sakolnakorn, Loei and Nongbualampoo by sampling 52 villages. Rodents were catched by trap then identified species and tested for scrub typhus immune level (Indirect Immunofluorescence). Chiggers collected from reservoir hosts and identified the species. The results found that the number of trap had rodent were 169 from 1,791 (the percent trap success was 9.44). The 69 of them were Rattus rattus (40.83 %) and 54 of 106 (50.94%) resevior host were positive for scrub typhus immunology test. Species of chiggers were Leptotrombidium diliense, Ascoschoengastia indica, Ascoschoengastia sp., Gahrliepia (Walchia) ewingi lupella, G. (Walchia) kritochaeta, G. (Walchia) globosa, G. (Walchia) disparunguis pingve, Helenicula lanius and Helenicula kohli. This data shown that chiggers are spread in areas and high risk for occur scrub typhus because they found L. diliense the main vector of disease. The public health officers could be induce people to be aware and protect themselves from chigger bitten when they have to go in risk areas.