Siriporn PhasomkusolsilPanita TanskulSupaporn RatanathamPochaman WatcharapichatDuangporn PhulsuksombatiStephen P. FrancesKriangkrai LerdthusneeKenneth J. LinthicumArmed Forces Research Institute of Medical Sciences, ThailandMahidol UniversityAustralian Army Malaria InstituteChulalongkorn UniversityUSDA Agricultural Research Service, Gainesville2018-06-112018-06-112012-11-01Journal of Medical Entomology. Vol.49, No.6 (2012), 1270-1275002225852-s2.0-84869752558https://repository.li.mahidol.ac.th/handle/20.500.14594/13381Leptotrombidium chiangraiensis Tanskul & Linthicum, and Leptotrombidium imphalum Vercammen--Grandjean are important vectors of scrub typhus in rice field habitats in northern Thailand. The developmental biology of all stages of the life cycle of two generations of these species of mites infected with Orientia tsutsugamushi (Hayashi) and uninfected mites is reported. The development of the infected lines of both F1 and F2 L. chiangraiensis were significantly longer than their respective uninfected lines (P < 0.05). The developmental times of uninfected and infected F1 lines of L. imphalum were not significantly different; however, F2 infected lines took significantly longer to develop (P < 0.05). Both F1 and F2 generations of infected L. imphalum and L. chiangraiensis oviposited on average > 150 fewer eggs than uninfected mites.Mahidol UniversityAgricultural and Biological SciencesImmunology and MicrobiologyMedicineVeterinaryArticleSCOPUS10.1603/ME12100