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1 November 2012 Influence of Orientia tsutsugamushi Infection on the Developmental Biology of Leptotrombidium imphalum and Leptotrombidium chiangraiensis (Acari: Trombiculidae)
Siriporn Phasomkusolsil, Panita Tanskul, Supaporn Ratanatham, Pochaman Watcharapichat, Duangporn Phulsuksombati, Stephen P. Frances, Kriangkrai Lerdthusnee, Kenneth J. Linthicum
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Abstract

Leptotrombidium 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.

Siriporn Phasomkusolsil, Panita Tanskul, Supaporn Ratanatham, Pochaman Watcharapichat, Duangporn Phulsuksombati, Stephen P. Frances, Kriangkrai Lerdthusnee, and Kenneth J. Linthicum "Influence of Orientia tsutsugamushi Infection on the Developmental Biology of Leptotrombidium imphalum and Leptotrombidium chiangraiensis (Acari: Trombiculidae)," Journal of Medical Entomology 49(6), 1270-1275, (1 November 2012). https://doi.org/10.1603/ME12100
Received: 29 April 2012; Accepted: 17 July 2012; Published: 1 November 2012
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KEYWORDS
chigger
developmental biology
Leptotrombidium chiangraiensis
Leptotrombidium imphalum
Orientia tsutsugamushi
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