Publications

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radix quadrasi and physastra hungerfordiana: additional natural second intermediate hosts of echinostoma malayanum in the philippines. 19921523471
echinostoma malayanum infection, the philippines. 200718214206
non-specific alkaline phosphomonoesterases of eight species of digenetic trematodes.alkaline phosphatases from different trematodes occupying the same habitat have identical ph otima but different levels of enzyme activities. isoparorchis hypselobagri, from the fish wallago attu, shows four to six times more enzyme activity than fasciolopsis buski, gastrodiscoides hominis and echinostoma malayanum, from the pig sus scrofa, and fasciola gigantica, gigantocotyle explanatum, cotylophoron cotylophorum and gastrothylax crumenifer, from the buffalo bubalus bubalis. at least two peaks ...19751442
concomitant and protective immunity in mice exposed to repeated infections with echinostoma malayanum.concomitant immunity and its consequence against infection play roles in regulating worm burdens in helminthiasis. under natural conditions, this immunity is generated by exposure to repeated low dose or trickle infection. in this study, concomitant immunity was induced in mice exposed repeatedly to infection with echinostoma malayanum and its protective effect on a challenge infection evaluated. a profile of worm burden from exposure to 10 metacercariae/mouse/week rose rapidly during the first ...201121272582
freshwater mollusks at designated areas in eleven provinces of thailand according to the water resource development projects.the study was conducted at 75 collecting loci in 15 districts of 11 provinces in thailand during 1999-2004. a total of 12,079 live mollusks were collected, 11,874 were snails and 205 were clams. the snails were comprised of 39 species and classified into 9 families: ampullariidae, bithyniidae, buccinidae, potamiopsidae, stenothyridae, thiaridae, viviparidae, planorbidae and lymnaeidae. the clams were comprised of 14 species classified into 2 families: amblemidae and corbiculidae. fifteen species ...200717539279
studies on echinostomatidae in malaya. iv. the animal hosts of echinostoma malayanum leiper, 1911 (trematoda). 196314047085
ecological observations on lymnaea (bullastra) cumingiana.field surveys conducted at echague, isabela and san pablo, laguna revealed that lymnaea (bullastra) cumingiana, the natural second snail intermediate host of echinostoma malayanum in the philippines, exhibits a moderate degree of diversity in its choice of habitats. rice fields of all stages of development, stagnant shallow streams and springs are the main areas where the snail can be collected from at echague, isabela. however, they were absent in rice fields that had been extensively sprayed w ...19938160069
scanning electron microscopy of adult echinostoma malayanum.scanning electron microscopy observations of e. malayanum adult obtained from small intestines of infected rats was made. the number of collar spines were 41. the features observed were a pair of corner spines (3 oral and 2 aboral) total 10; a pair of lateral collar spines (10 spines each side); total 20; dorsal collar spines (5 oral and 6 aboral) total 11. sensory papillae were found more densely situated on the circumoral disc around the oral sucker and on the ventral sucker. other sensory org ...19873672186
lymnaea (bullastra) cumingiana pfeiffer (pulmonata: lymnaeidae): second intermediate host of echinostoma malayanum in the philippines.adult flukes were obtained from laboratory rats and hamsters fed with metacercariae isolated from lymnaea (bullastra) cumingiana pfeiffer and were identified as echinostoma malayanum leiper based on the presence of a circumoral collar of 43-45 spines and the highly lobed testes. this discovery is of public health significance because l. (bullastra) cumingiana in eaten raw by certain local populations in northern luzon. the proposed new species, cathaemasia cabrerai (jueco and monzon, 1984), is p ...19892633353
factors affecting laboratory acclimatization of field collected lymnaea (bullastra) cumingiana pfeiffer (pulmonata: lymnaeidae).lymnaea (bullastra) cumingiana, the newly discovered natural second intermediate host of echinostoma malayanum in the philippines, is a sensitive and delicate lymnaeid species which requires certain conditions for successful transport from the field and cultivation in the laboratory. field collected specimens were found to be best transported in styrofoam containers lined with wet filter paper or containing natural substrate and vegetation instead of sphagnum moss. the method is convenient and p ...19911820655
socio-economic, health and nutritional status of the villagers in the nong wai irrigation area, khon kaen, northeast thailand.studies were carried out from june 1974 to may 1975 on the socio-economic status, health and nutritional status of the people in 4 villages, in the irrigation area of the nong wai pioneer agricultural project of khon kaen province, northeast thailand. the result obtained were compared with those in 2 non-irrigated villages in the same province, in order to identify the health and nutritional problems which might arise during the water resource development in the irrigation area. it was found tha ...19761030856
infection of indoplanorbis exustus deshayes 1834 with echinostoma malayanum leiper 1911 as a function of shell diameter. 1978722465
quantitative studies on acetylcholinesterase in seven species of digenetic trematodes.quantitative estimation of absolute levels and in vitro release of acetylcholinesterase (ache) in seven species of digenetic trematodes: isoparorchis hypselobagri from the swim bladder of catfish, wallago attu; srivastavaia indica and gastrothylax crumenifer from the rumen, and gigantocotyle explanatum from the liver of the water buffalo, bubalus bubalis; fasciolopsis buski, echinostoma malayanum from the small intestine and gastrodiscoides hominis from the caecum of the pig, sus scrofa reveale ...1977562036
genetic variation and relationships of four species of medically important echinostomes (trematoda: echinostomatidae) in south-east asia.multilocus enzyme electrophoresis (mee) and dna sequencing of the mitochondrial cytochrome c oxidase subunit 1 (co1) gene were used to genetically compare four species of echinostomes of human health importance. fixed genetic differences among adults of echinostoma revolutum, echinostoma malayanum, echinoparyphium recurvatum and hypoderaeum conoideum were detected at 51-75% of the enzyme loci examined, while interspecific differences in co1 sequence were detected at 16-32 (8-16%) of the 205 alig ...201021129506
studies on echinostomatidae in malaya. iii. the adult echinostoma malayanum leiper, 1911 (trematoda) and the probable synonymy of artyfechinostomum sufrartyfex lane, 1915. 196314047084
detection of opisthorchis viverrini in experimentally infected bithynid snails and cyprinoid fishes by a pcr-based method.a pcr procedure for the detection of opisthorchis viverrini in experimentally infected bithynid snails and cyprinoid fishes was developed. this procedure was based on primers designed from a pov-a6 specific probe sequence giving a 330 base-pair product. the detection was accomplished in host tissue homogenates to which a single cercaria or metacercaria was introduced. pcr can detect as little as a single cercaria artificially inoculated in a snail or a single metacercaria artificially inoculated ...200312613764
nucleotide sequence of mitochondrial co i and ribosomal its ii genes of opisthorchis viverrini in northeast thailand.the mitochondrial cytochrome c oxidase subunit i (co i) gene and the second internal transcribed spacer region (its ii) gene of opisthorchis viverrini were compared among o. viverrini from various areas in northeast thailand. the nucleotide sequences of partial co i gene (417 bp) of o. viverrini differed among o. viverrini originated from ubon ratana, leongpleuy, ban phai, maha sarakham, and chatturat. these intraspecific variations were classified into 5 patterns but no area-specific pattem was ...200112041584
human infection with echinostoma malayanum leiper, 1911 (trematoda: echinostomatidae). 196313930506
eating habits associated with echinostoma malayanum infections in the philippines.a survey of 61 residents belonging to 12 pre-selected families (having at least one member positive for echinostomiasis malayanum) from barangay malibago, echague, isabela (northern luzon) suggested that infections with echinostoma malayanum follow a "familial trend". the parasite is endemic because the raw ingestion of lymnaea (bullastra) cumingiana, the second intermediate host in the philippines, is a learned habit passed down from one generation to the next. a questionnaire on eating habits ...19911822888
in vitro cultivation of echinostoma malayanum leiper, 1911. 19744480432
first record of human infection with echinostoma malayanum in india. 19938296371
the life history of echinostoma malayanum leiper, 1911 (trematoda, echinostomatidae). 196313930505
detection of paragonimus heterotremus eggs in experimentally infected cats by a polymerase chain reaction-based method.a polymerase chain reaction (pcr) procedure for the detection of paragonimus heterotremus eggs in stool samples was developed and compared with stoll's egg count method. the primers were designed on the basis of a previously constructed pph-13-specific dna probe, which produced an approximate 0.5-kb amplified product. this pcr method could detect as few as 5 eggs in 0.6 g of artificially inoculated feces of a healthy control cat or as little as 1 x 10(-4) ng of p. heterotremus genomic dna. the a ...200515856902
opisthorchiasis and intestinal fluke infections in northern thailand.four hundred and thirty-one residents from 16 provinces in northern thailand who had previously been found positive for opisthorchis viverrini or opisthorchis viverrini-like eggs were given praziquantel 40 mg/kg. the stool was collected for 4 to 6 times and examined for adult worms. the prevalence of opisthorchis viverrini in this group was 11.6%. intestinal flukes, haplorchis taichui and haplorchis yokogawai, were predominantly found in 63.11% and 10.44% respectively. other intestinal flukes (c ...19989740284
a singleplex real-time fluorescence resonance energy transfer pcr with melting curve analysis for the differential detection of paragonimus heterotremus, echinostoma malayanum and fasciola gigantica eggs in faeces.because the eggs of paragonimus, echinostoma and fasciola are very similar in size and shape, it is difficult to distinguish and accurately identify species by the morphology of their eggs, which is a standard diagnostic method.201626740365
helminth communities in murid rodents from southern and northern localities in lao pdr: the role of habitat and season.the helminth communities of wild murid rodents were investigated in luang prabang and champasak province, lao pdr. thirteen species of rodents (404 individuals) were infected by 19 species of parasites (2 trematode, 3 cestode, 14 nematode species). four of the recorded helminth species (echinostoma malayanum, raillietina sp., hymenolepis diminuta and h. nana) are known to cause potential zoonotic helminthiases of medical importance in the south-east asian region. individual helminth infection wa ...201423552185
multi-infection with helminths in adults from northeast thailand as determined by post-treatment fecal examination of adult worms.six hundred and eighty-one residents from 16 provinces in northeast thailand who had previously been found positive for opisthorchis viverrini and taenia spp. eggs were given 40 mg praziquantel (bayer, germany), per kg body weight. the total stool output for one to three days was collected and examined for adult worms. the prevalence of o. viverrini in this group was 92.4%. the intestinal flukes echinostoma malayanum, e. ilocanum and e. revolutum were found to be high in males, with 8.3%, 8.1% a ...19947939164
a survey of helminth infection in rats (rattus spp) from chiang mai moat.an investigation of helminths in the norway (brown) rat, rattus norvegicus, and roof rat, rattus rattus, from chiang mai moat during may to august 1995, was done. thirty-three out of thirty-eight trapped rats were infected (86.84%); 16 r. norvegicus (100%) and 17/22 r. rattus (77.27%). the rat was infected with 10 helminth species: 4 trematodes, centrocestus sp (2.63%), echinostoma ilocanum (10.52%), echinostoma malayanum (10.52%) and quinqueseralis quinqueseralis (39.47%); 2 cestodes, raillieti ...19979656373
the life history of echinostoma malayanum: leiper, 1911. 196313930507
in vivo development of echinostoma malayanum leiper, 1911 with notes on effects of population density, chemical composition and pathogenicity and in vitro excystment of the metacercaria (trematoda: echinostomatidae).in vivo development of echinostoma malayanum leiper, 1911 was studied in white rats and the developmental process was arbitrarily divided into four stages: organogeny, vitellogenesis, formation of mehlis' gland complex and cirrus sac, and oviposition. the percentage of development was 86-94. population density affected the prepatent period of flukes and the normal prepatent period of 13-16 days was altered to 18-23 days in infection with 500-800 flukes. the majority of flukes in heavy infection ...1978645180
potentially zoonotic helminthiases of murid rodents from the indo-chinese peninsula: impact of habitat and the risk of human infection.in this study, we report the potential rodent-borne zoonotic helminths in wild-caught murid rodents from four categorized habitats-forest, nonflooded land, irrigated land, and human settlement in seven localities of thailand, cambodia, and lao pdr. out of 2478 rodent samples, 735 (29.7%) were infected by at least one of the following zoonotic helminth species: echinostoma malayanum, echinostoma ilocanum, plagiorchis muris, raillietina spp., hymenolepis diminuta, hymenolepis nana, cyclodontostomu ...201525629783
animal models for echinostoma malayanum infection: worm recovery and some pathology.echinostomes are intestinal trematodes that infect a wide range of vertebrate hosts, including humans, in their adult stage and also parasitize numerous invertebrate and cold-blooded vertebrate hosts in their larval stages. the purpose of this study was to compare echinostoma malayanum parasite growth, including worm recovery, body size of adult worms, eggs per worm, eggs per gram of feces, and pathological changes in the small intestine of experimental animals. in this study, 6-8-week-old male ...201626951978
histochemical and electrophoretic studies on phosphatases of some indian trematodes.the isoenzymes of acid and alkaline phosphatases and their histochemical localization were studied by polyacrylamide disc gel electrophoresis in four species of trematodes: gigantocotyle explanatum from the liver and gastrothylax crumenifer from the rumen of water buffalo (bubalus bubalis) and echinostoma malayanum and fasciolopsis buski from the small intestine of the pig (sus scrofa). both acid and alkaline phosphatases were present in the tegument, gastrodermis, suckers, testes, ovary, eggs, ...19827096966
experimental second intermediate hosts of echinostoma malayanum leiper, 1911. 19734722600
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