| a new species of leptotrombidium (acari:trombiculidae) collected in active rice fields in northern thailand. | leptotrombidium (leptotrombidium) chiangraiensis tanskul & linthicum is described and illustrated as new from specimens collected from the rodents rattus rattus (l., 1758), rattus argentiventer (robinson & kloss, 1916), rattus losea (swinhoe, 1870), and bandicota indica (bechstein, 1800) in chiangrai province northern thailand. the new species was collected in active rice fields and adjacent fruit plantation areas. the etiological agent of scrub typhus, orientia (formerly rickettsia) tsutsugamus ... | 1997 | 9151504 |
| a new ecology for scrub typhus associated with a focus of antibiotic resistance in rice farmers in thailand. | following the documentation of chloramphenicol-resistant and doxycycline-resistant strains of orientia tsutsugamushi (hyashi) in northern thailand, we conducted ecological and epidemiological studies near the houses of patients hospitalized with antibiotic-resistant infections. new associations between chiggers, rodents, and o. tsutsugamushi in active rice agriculture areas, an ecological habitat not described previously, are reported. rattus rattus (l.) was the most common species (representing ... | 1998 | 9701943 |
| redescription of leptotrombidium (leptotrombidium) imphalum (acari: trombiculidae), with observations on bionomics and medical importance in northern thailand. | leptotrombidium (leptotrombidium) imphalum vercammen-grandjean & langston is redescribed and illustrated. specimens were collected from the rodents rattus rattus, rattus losea, and bandicota indica in chiangrai province, northern thailand. the species was found on hosts collected on dikes at the margins of rice fields and in adjacent fruit plantations and along irrigation canals, especially in areas covered with the grasses imperata cylindrica (lalang grass) and saccharum arudinaceum. the etiolo ... | 1999 | 10071498 |
| development of a recombinant protein-based enzyme-linked immunosorbent assay and its applications in field surveillance of rodent mice for presence of immunoglobulin g against orientia tsutsugamushi. | a recombinant protein containing the immunodominant conserved epitope region of the 56-kda outer membrane protein of the karp strain of orientia tsutsugamushi was purified to near homogeneity using recombinant dna techniques. the purified protein was used to immunize rabbits and produced an antibody that could recognize different strains of o. tsutsugamushi, as demonstrated both by western blotting and immunofluorescence assay. an enzyme-linked immunosorbent assay (elisa) based on this recombina ... | 2003 | 12738648 |
| scrub typhus: vector competence of leptotrombidium chiangraiensis chiggers and transmission efficacy and isolation of orientia tsutsugamushi. | a total of 4,281 rodents, belonging to 20 species, was collected from three villages in chiangrai province, northern thailand, from january 1994 to december 2001. the predominant species were rattus rattus, r. losea and bandicota indica, accounting for 96% of the total. more than 135,000 chigger mites were removed from wild rodents of which 1% were identified as leptotrombidium chiangraiensis, a new species vector of scrub typhus. five orientia tsutsugamushi-infected l. chiangraiensis colonies e ... | 2003 | 12860596 |
| occurrence of orientia tsutsugamushi in small mammals from thailand. | extensive sampling of small mammals was conducted in eight provinces of thailand between september 9, 1992 and april 29, 2001. a total of 3,498 specimens representing 22 species were collected. eighty-eight percent (3,089 of 3,498) of the animals were collected from a region in chiangrai province, which is commonly recognized as endemic for human scrub typhus. blood and tissue samples from each animal were tested for the presence of orientia tsutsugamushi, the etiologic agent of scrub typhus. th ... | 2003 | 14695089 |