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[a numerical taxonomic study on heterophyid trematodes].a numerical taxonomy was studied on a group of heterophyid trematodes and analysis was made on the following species: metagonimus yokogawai (3 otu, operational taxonomic unit), metagonimus miyata type (3 otu), metagonimus takahashii (2 otu), heterophyes dispar (2 otu), heterophyes heterophyes (1 otu), heterophyes nocens (2 otu), heterophyopsis continua (1 otu), pygidiopsis summa (3 otu), stellantchasmus falcatus (2 otu) and stictodora lari (2 otu). twenty-six morphological characters were measur ...19911911627
intestinal trematodes of humans in korea: metagonimus, heterophyids and echinostomes.ten species of the trematode family heterophyidae (metagonimus yokogawai, m. takahashii, heterophyes nocens, h. heterophyes, h. dispar, heterophyopsis continua, pygidiopsis summa, stellantchasmus falcatus, centrocestus armatus and stictodora fuscatum), and 3 species of the family echinostomatidae (echinostoma hortense, e. cinetorchis and echinochasmus japonicus) have been found to infect humans in korea. biological and epidemiological studies on the above species have shown that metagonimus, het ...19902133416
review of zoonotic parasites in medical and veterinary fields in the republic of korea.zoonotic parasites are animal parasites that can infect humans. the major zoonotic protozoa in the republic of korea are babesia bovis, chilomastix mesnili, cryptosporidium parvum, endolimax nana, entamoeba coli, entamoeba hitolytica, giardia lamblia, iodamoeba bütschlii, pneumocystis carinii, sarcocystis cruzi, and toxoplasma gondii. the major zoonotic helminths in korea include trematodes, cestodes, and nematodes. trematodes are clonorchis sinensis, echinostoma hortense, echinostoma spp., fasc ...200919885329
fish-borne zoonotic trematode metacercariae in the republic of korea.the prevalence of fish-borne trematodes (fbt), including clonorchis sinensis, is still high in riverside areas of the republic of korea. the author reviewed the detection and identification methods, differential keys, fish intermediate hosts, and morphological characteristics of fbt metacercariae. fbt metacercariae found in freshwater fish are classified mainly into 4 families, i.e., opisthorchiidae, heterophyidae, echinostomatidae, and clinostomidae. the metacercariae of c. sinensis, found in 4 ...200919885326
prevalence of gymnophalloides seoi infection in coastal villages of haenam-gun and yeongam-gun, republic of korea.one coastal village in haenam-gun and two in yeongam-gun, jeollanam-do were surveyed for intestinal parasite infections by fecal examination. the egg positive rates of gymnophalloides seoi were high, 24.1% (14/58) in haenam-gun and 9.3% (11/118) in yeongam-gun. the egg positive rates of heterophyids, including heterophyes nocens, and of clonorchis sinensis were 10.3% and 6.9% in haenam-gun, and 14.4% and 8.5% in yeongam-gun, respectively. after praziquantel treatment and purgation, a total of 37 ...200616514291
heterophyid metacercarial infections in brackish water fishes from jinju-man (bay), kyongsangnam-do, korea.heterophyid metacercarial infections in brackish water fishes, i.e., perch, shad, mullet, redlip mullet, and goby, of jinju-man (bay), kyongsangnam-do, korea, were investigated using a digestion technique. among 45 perch (lateolabrax japonicus), the metacercariae of heterophyopsis continua were found in 55.6% (18.5 metacercariae per fish), stictodora spp. in 28.9% (3.6), and metagonimus takahashii in 6.7% (17.0). the metacercariae of h. continua were detected in 23 (65.7%) of 35 shad (konosirus ...200616514276
prevalence of heterophyes nocens and pygydiopsis summa infections among residents of the western and southern coastal islands of the republic of korea.to determine the distribution and prevalence of heterophyid fluke infections on coastal islands of the republic of korea, fecal specimens were collected from 4,179 people residing on 45 islands in the west (yellow) and south seas and examined using the formalin-ether and kato-katz techniques. eggs of heterophyes nocens were found in 459 (11.0%) residents of 42 islands, with an average number of eggs per gram (epg) of feces of 79.6. eggs of pygidiopsis summa were found in 49 (1.2%) on 12 islands, ...200415569794
two species of goby, boleophthalmus pectinirostris and scartelaos sp., as the new second intermediate hosts of heterophyid fluke in korea.a survey was performed in order to determine the infection status of the metacercariae of heterophyid fluke in two goby species, boleophthalmus pectinirostris and scartelaos sp., collected from gangjin-gun, and shinangun, sooncheon-shi, jeollanam-do, republic of korea. a total of three metacercariae of heterophyopsis continua was found in only one b. pectinirostris (10.0%) from gangjin-gun. heterophyes nocens metacercariae were detected in 24 b. pectinirostris (96.0%) and 14 scartelaos sp. (63.6 ...200516340306
an incidental case of human heterophyes nocens infection diagnosed by sectional morphology in a biopsy specimen of the small intestine.a case of human infection with heterophyes nocens (heterophyidae) was incidentally found in a biopsy specimen of the meckel's diverticulum at the upper part of the small intestine. the patient was a 58-year-old man living in a rural area of talsonggun, kyongsangbuk-do. he had gastrointestinal symptoms such as epigastric pain, indigestion, and abdominal discomfort for 3 months, and severe diarrhea, abdominal pain, and vomiting for about 1 month before hospitalization. endoscopy of the upper part ...199910507227
comparative morphology of eggs of heterophyids and clonorchis sinensis causing human infections in korea.in order to provide some clues for differential diagnosis of trematode infections in fecal examination, the comparative morphology of eggs of 5 kinds of heterophyid flukes (metagonimus yokogawai, heterophyes heterophyes nocens, heterophyopsis continua, stellantchasmus falcatus and pygidiopsis summa) and clonorchis sinensis was studied. the eggs were obtained from distal portion of uteri of worms which were recovered from men after treatment. the characteristic shape and apperance of each kind of ...198412891010
intestinal trematodes infecting humans in korea.sixteen species of intestinal trematodes have been recovered from humans in korea. they include 10 species of the family heterophyidae (metagonimus yokogawai, m. takahashii, heterophyes nocens, h. heterophyes, h. dispar, heterophyopsis continua, pygidiopsis summa, stellantchasmus falcatus, centrocestus armatus, and stictodora fuscatum); one species of diplostomidae (fibricola seoulensis); three species of echinostomatidae (echinostoma hortense, e. cinetorchis, and echinochasmus japonicus); one s ...19911822879
studies on intestinal trematodes in korea xi. two cases of human infection by heterophyes heterophyes nocens.two human cases of heterophyes heterophyes nocens infection were proved by identifying adult worms after treatment with bithionol or praziquantel in 1983 in korea. they are 37 (case 1) and 24-year old (case 2) males whose residence or native village is a southern coastal area in kohung-gun, chollanam-do. the case 1 had the gastrointestinal symptoms such as epigastric pain and indigestion, and the case 2 heart problems such as arrhythmia and ventricular premature beat in ekg and digestive symptom ...198412891029
two endemic foci of heterophyids and other intestinal fluke infections in southern and western coastal areas in korea.two endemic foci of heterophyid infections were discovered in coastal villages of puan-gun, chollabuk-do, and sachon-gun. kyongsangnam-do, korea. fecal examinations were performed on 153 inhabitants of puan-gun and 138 of sachon-gun, using cellophane thick smear and formalin-ether sedimentation technique. the helminth egg and/or protozoan cyst positive rate was 21.5% (33/153) in puan-gun and 39.1% (54/138) in sachon-gun. in puan-gun, the egg positive rate of heterophyids was the highest, 17.6%, ...19989755586
echinostoma hortense and heterophyid metacercariae encysted in yellowfin goby, acanthogobius flavimanus, from shinan-gun and muan-gun (jeollanam-do), korea.fishborne trematode (fbt) metacercariae were investigated in yellowfin goby, acanthogobius flavimanus, collected from shinan-gun and muan-gun, jeollanam-do (province), korea. all collected fishes were examined using the artificial digestion method. in all of 15 gobies from aphae-myeon in shinan-gun, metacercariae of stictodora spp. (334 metacercariae/fish), heterophyes nocens (153/fish), and heterophyopsis continua (20/fish) were detected. in 2 of 14 gobies from jido-myeon in shinan-gun, 8 echin ...200919724708
surface ultrastructure of heterophyes nocens (trematoda: heterophyidae).the surface ultrastructure of heterophyes nocens (trematoda: heterophyidae) was studied by scanning electron microscopy(sem). the adult worms were recovered from experimentally infected cats and from a naturally infected patient. they were leaf-like, ventrally concave, and ovoid or pyriform in shape. ciliated knob-like sensory papillae (type i) were observed in single or grouped forms on and around the oral sucker, whereas non-ciliated round swellings (type ii papillae) were seen on the lip of t ...19921627506
zoonotic intestinal trematodes in stray cats (felis catus) from riverside areas of the republic of korea.the present study was performed to survey the infection status of zoonotic intestinal trematode (zit) in stray cats from 5 major riverside areas in the republic of korea. total 400 stray cats were captured with live-traps in riverside areas of seomjingang ('gang' means river) (203 cats) from june to october 2010, and of yeongsangang (41), nakdonggang (57), geumgang (38), and hangang (61 cats) from june to october 2011, respectively. small intestines resected from cats were opened with a pair of ...201525925180
heterophyid trematodes (heterophyopsis continua, pygidiopsis summa and heterophyes heterophyes nocens) from domestic cats in korea.during 8 april 1983 to 9 april 1985, a total of 181 domestic cats (felis catus domestica linnaeus) of unknown localities in korea were purchased at seoul chung-ang market, and the internal organs were dissected for helminth infections. in the results, three kinds of trematodes of family heterophyidae (ohdner, 1914) were obtained from small intesine of domestic cats and identified as follows: five adult worms of heterophyopsis continua (onji et nishio, 1916) from three hosts, two hundreds and twe ...198512888661
a new endemic focus of gymnophalloides seoi infection on aphae island, shinan-gun, jeollanam-do.a new endemic focus of gymnophalloides seoi infection has been discovered on aphae island (shinangun, jeollanam-do), republic of korea. this area, which is referred to as bokyong-ri, is a small seashore village located in the northern portion of the island. fecal samples were collected from a total of 57 residents and examined by the kato-katz and formalin-ether sedimentation techniques. helminth eggs were detected in 37 samples (64.9%); 33 samples were positive for g. seoi eggs (57.9%), 4 for p ...200717374977
a new endemic focus of heterophyes nocens and other heterophyid infections in a coastal area of gangjin-gun, jeollanam-do.to know the prevalence of heterophyid trematodes among inhabitants of a southern coastal village, i.e., sacho-ri, gangjin-gun, jeollanam-do (province), 82 stool samples were examined on helminth eggs and protozoan cysts using kato-katz and formalin-ether sedimentation techniques. total 33 people (40.2%) were positive for trematodes (heterophyes nocens 15 people, pygidiopsis summa 3, metagonimus sp.; 4, clonorchis sinensis 7, gymnophalloides seoi 6) and/or protozoa (entamoeba coli 3). among intes ...200717374976
the first discovery of an endemic focus of heterophyes nocens (heterophyidae) infection in korea.a highly endemic focus of human infection with heterophyes nocens (heterophyidae) was discovered from a small coastal village of shinan-gun, chollanam-do, for the first time in korea. fecal examinations by cellophane thick smear and formalin-ether sedimentation techniques revealed 42.9% heterophyid egg positive rate out of 98 inhabitants examined. it was difficult to confirm the species of heterophyids only by eggs. in order to collect the adult flukes, the egg positive cases were treated with 1 ...19947953240
comparative morphology of minute intestinal fluke eggs that can occur in human stools in the republic of korea.the egg morphology of minute intestinal flukes (mif) that can occur as human infections in the republic of korea, i.e., metagonimus yokogawai, m. miyatai, m. takahashii, heterophyes nocens, heterophyopsis continua, stellantchasmus falcatus, stictodora fuscata, pygidiopsis summa, and gymnophalloides seoi, was studied in comparison with clonorchis sinensis. the adult worms were obtained from residents of endemic areas, and their intrauterine eggs were studied and measured using light microscopy; t ...201222949747
a new endemic focus of heterophyes nocens, pygidiopsis summa, and other intestinal flukes in a coastal area of muan-gun, chollanam-do.a small coastal village of muan-gun, chollanam-do, was surveyed for intestinal fluke infections, especially heterophyids such as heterophyes nocens and pygidiopsis summa by fecal examination on 108 inhabitants. the egg positive rate of heterophyids was very high, 75.0%, and that of other parasites was comparatively low, 0.9-3.7% by parasite species. after treatment of 20 patients showing high e.p.g. with praziquantel and purging with mgso4, total 3,864 specimens of h. nocens were collected from ...19979446903
food-borne intestinal trematode infections in the republic of korea.a total of 19 species of food-borne intestinal trematodes have been reported in humans in the republic of korea. they include 12 species of the heterophyidae, metagonimus yokogawai, m. takahashii, m. miyatai, heterophyes nocens, h. heterophyes (imported), h. dispar (imported), heterophyopsis continua, pygidiopsis summa, stellantchasmus falcatus, centrocestus armatus, stictodora fuscata, and s. lari; four species of the echinostomatidae, echinostoma hortense, e. cinetorchis, echinochasmus japonic ...200212113752
a survey of heterophyes nocens and pygidiopsis summa metacercariae in mullets and gobies along the coastal areas of the republic of korea.the infection status of mullets mugil cephalus (n = 139) and gobies (n = 35) acanthogobius flavimanus with metacercariae of heterophyes nocens and pygidiopsis summa was examined in 11 western, southern, and eastern coastal areas of the republic of korea, using a digestion technique. heterophyid metacercariae were highly prevalent in mullets from western and southern coastal areas; shinan-gun (100% for h. nocens and 100% for p. summa), muan-gun (93% and 100%), buan-gun (42% and 75%), seocheon-gun ...200717876166
epidemiological and molecular data on heterophyid trematode metacercariae found in the muscle of grey mullets (osteichthyes: mugilidae) from sardinia (western mediterranean sea).this study is a contribution to the molecular taxonomy and epidemiology of heterophyid (trematoda: heterophyidae) metacercariae found in the muscle of mugilidae (osteichthyes) from sardinia (western mediterranean sea). sixty specimens of mugilids (13 chelon labrosus, 18 liza aurata, 6 liza ramada, 8 liza saliens, 15 mugil cephalus) were examined and 17,899 metacercariae isolated in 95 % of the hosts. four types of metacercariae were identified: heterophyes sp. (nā€‰=ā€‰14,113), heterophyes sp. -smal ...201627154766
pygidiopsis summa (digenea: heterophyidae): status of metacercarial infection in mullets from coastal areas in the republic of korea.to know the infection status of zoonotic trematode metacercariae in brackish water fish, we surveyed mullets collected from 18 coastal areas in the republic of korea. the metacercariae of pygidiopsis summa were detected in 236 (68.2%) out of 346 mullets examined. they were found in mullets from 15 areas except for those from boseong-gun (jeollanam-do), pohang-si, and uljin-gun (gyeongsangbuk-do). especially in mullets from taean-gun (chungcheongnam-do) and geoje-si (gyeongsangnam-do), their prev ...201627658602
heterophyid trematodes recovered from people residing along the boseong river, south korea.we conducted an epidemiological survey to determine the status of heterophyid fluke infections among people residing along the boseong river, gokseong-gun, south korea (= korea) from october 2011 to february 2012. fecal specimens were collected from 115 (male 51, female 64) people and examined for intestinal helminth eggs using the kato-katz thick smear technique. the eggs of metagonimus yokogawai together with other metagonimus spp. were detected in 28 (24.3%) cases. eleven egg positive people ...201525944352
infection status of estuarine fish and oysters with intestinal fluke metacercariae in muan-gun, jeollanam-do, korea.the source of human infection with intestinal flukes was surveyed in estuarine fishes, including the dotted gizzard shad, common sea bass, common blackish goby, redlip mullet, black sea bream, and oyster collected from muan-gun, jeollanam-do, korea during august and september 2007. collected fishes and oysters were artificially digested in pepsin-hcl solution and examined under a stereomicroscope. in 36 shads (konosirus punctatus) and 20 basses (lateolabrax japonicus) examined, heterophyopsis co ...201222949748
epidemiological survey on the infection of intestinal flukes in residents of muan-gun, jeollanam-do, the republic of korea.infection status of intestinal flukes was investigated in residents of muan-gun, jeollanam-do, the republic of korea. total 1,257 fecal samples of residents were examined by formalin-ether sedimentation technique and kato-katz thick smear method. helminth eggs were detected from 95 (7.6%) residents, and eggs of heterophyid flukes and clonorchis sinensis were found from 62 (4.9%) and 40 (3.2%) cases, respectively. the larger heterophyid eggs, somewhat dark-brown in color and 37.7 x 21.5 microm in ...201020585529
intestinal helminth infections in feral cats and a raccoon dog on aphaedo island, shinan-gun, with a special note on gymnophalloides seoi infection in cats.four feral cats and a raccoon dog purchased from a local collector on aphaedo island, shinan-gun, where human gymnophalloides seoi infections are known to be prevalent, were examined for their intestinal helminth parasites. from 2 of 4 cats, a total of 310 adult g. seoi specimens were recovered. other helminths detected in cats included heterophyes nocens (1,527 specimens), pygidiopsis summa (131), stictodora fuscata (4), acanthotrema felis (2), spirometra erinacei (15), toxocarids (4), and a ho ...200919488429
potential zoonotic trematodes recovered in stray cats from kuwait municipality, kuwait.stray cats are a common feature roaming the streets and alleys of kuwait; they could be a source of parasites, including trematodes, that affect humans. a survey was conducted to identify feline trematodes and throw the light on their public health significance in kuwait. out of 240 stray cats trapped from different localities of kuwait from june 2011 to may 2012, 59 (24.6%) were found to be infected with 14 species of trematodes. the most common were trematodes of the genus heterophyes, particu ...201526174821
infection status with helminthes in feral cats purchased from a market in busan, republic of korea.the present study was performed to investigate the infection status with helminth in a group of feral cats in korea. more than 29 helminth species including adults or eggs were detected in visceral and fecal samples of the examined cats. among these were a host of nematodes, including toxocarids, ancylostoma sp. and the larva of anisakis simplex; trematodes, including clonorchis sinensis, paragonimus westermani, eurytrema pancreaticum, pharyngostomum cordatum, metagonimus spp., heterophyes nocen ...200516192750
one human case of natural infection by heterophyopsis continua and three other species of intestinal trematodes.the third human case of natural infection by heterophyopsis continua in korea was found in chinju, kyongsangnam-do. the case was a 53-year-old man. he used to eat raw brackish and fresh water fish. after praziquantel treatment and purgation, h. continua were collected from the diarrheal stool together with metagonimus yokogawai, heterophyes nocens and echinostoma hortense. his clinical complaints were indigestion, epigastric discomfort, poor appetite and fatigue. the complaints were considered r ...19968820745
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