Supatra Thongrungkiat

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AalDNV-infected C6/36 cells serially passaged for over 10 weeks showed a decline in percentage of anti-AalDNV-positive cells (APC) from an initial 92% to approximately 20%. Cultures of persistent APC were indistinguishable from uninfected cultures by direct microscopy but most stained cells from early APC passages had enlarged nuclei with eosinophilic(More)
A prospective field study was conducted to determine transovarial dengue-virus transmission in two forms of Aedes aegypti mosquitoes in an urban district of Bangkok, Thailand. Immature Aedes mosquitoes were collected monthly for one year and reared continuously until adulthood in the laboratory. Mosquitoes assayed for dengue virus were processed in pools(More)
Aedes aegypti, at the larval stage, has been subjected to the temephos selection in laboratory. The level of temephos resistance was detected in a microplate by biochemical assay using WHO bioassay technique. The major enzyme-based resistance mechanisms involved in temephos resistance include elevated nonspecific esterase, oxidase and insensitive(More)
BACKGROUND AND METHOD Variation in wing length among natural populations of Aedes (Stegomyia) aegypti (L.) (Diptera: Culicidae) is associated with different vectorial capacities. Geometric morphometrics allowed us to use a more powerful estimator of wing size ('centroid size'), as well as to visualize the variation of wing shape, to describe the effects of(More)
The bioefficacy of mosquito coils containing several pyrethroids were tested in a 25 m3 room against Culex pipiens quinquefasciatus, Aedes aegypti and Anopheles dirus. The test results were compared with tests against Culex pipiens pallens in Japan. Based on the KT50 values (the 50% knockdown time) of mosquito coils containing dl, d-T80-allethrin, d,(More)
It has frequently been reported that Plasmodium vivax suppressed Plasmodium falciparum and ameliorated disease severity in patients infected with these two species simultaneously. The authors investigate the hypothesis that immunological responses stimulated by P. vivax may play a role in suppressing co-infecting P. falciparum. Sera, taken sequentially from(More)
The population genetic studies on the Anopheles minimus complex revealed that An. minimus is a species complex evident by IK value were less than 0.0534 and 0.4163 for the morphotaxonomy and isozyme studies. There are two sibling species in the An. minimus species complex. The first is the typical minimus and its variations described by Harrison. Esterase-2(More)
The aim of this study is to determine the specific IgG antibody for Toxoplasma gondii in pregnant Thai women by IFAT, using formalin-fixed whole tachyzoites and comparing the sensitivity and specificity with those of the Sabin-Feldman dye test (SFDT). Blood samples were collected from 189 pregnant Thai women, who came for their first visit at the antenatal(More)
Two types of morphological variants, the dark form and the pale form of Aedes aegypti were selected from wild-caught mosquitos. Ascertaining any differences between the two forms for susceptibility to dengue type 2 virus was performed by oral feeding. Transovarial transmission was further determined from the progenies of infected mosquitos by tracing them(More)
Mosquitoes-borne viruses are a major threat for human populations. Among them, chikungunya virus (CHIKV) and dengue virus (DENV) cause thousands of cases worldwide. The recent propagation of mosquito vectors competent to transmit these viruses to temperate areas increases their potential impact on susceptible human populations. The development of sensitive(More)