We characterized the intracellular symbiotic bacteria of the hematophagous glossiphoniid leeches Placobdelloides siamensis and a Parabdella sp. These leeches have a specialized structure called an "esophageal organ," the cells of which harbor bacterial symbionts. From the esophageal organ of each species, a 1.5-kb eubacterial 16S rRNA gene segment was amplified by PCR, cloned, and sequenced. Di...

Trees with larvicidal activity may be found in Thailand. We conducted this study to evaluate the efficacy and length of efficacy of Thai neem (Azadirachta siamensis) oil emulsion and an alginate bead of Thai neem oil formulation against early fourth stage Aedes aegypti larvae using a dipping test. The Thai neem oil emulsion had significantly greater larvicidal activity than the alginate bead fo...

The major viperid snakes present in Taiwan today are: Daboia russelli siamensis, Deinagkistrodon acutus, Protobothrops mucrosquamatus, Trimeresurus stejnegeri, Ovophis monticola and Ovophis gracilis. As suggested by the species trees deduced from mtDNA sequences of the family Viperidae, these species apparently belong to five different genera. Molecular cloning, N-terminal sequencing, and mass ...

This study identified three soil bacteria (NRRU-BW3, NRRU-BW3, and NRRU-TV11) that degrade chlorpyrifos, produce indole-3-acetic acid, exopolysaccharides under pesticide stress. The results revealed were as Priestia megaterium Bacillus siamensis NRRU-BW9, amyloliquefaciens NRRU-TV11. These strains showed the ability to acid (IAA) (EPS) in chlorpyrifos. Moreover, these can chlorpyrifos (CP) an a...