| 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 ... | 1991 | 1822879 |
| [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 ... | 1991 | 1911627 |
| 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 ... | 1990 | 2133416 |
| 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 ... | 1994 | 7953240 |
| 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 ... | 1997 | 9446903 |
| 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%, ... | 1998 | 9755586 |
| 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 ... | 2002 | 12113752 |
| surface ultrastructure of pygidiopsis summa (digenea: heterophyidae) adult flukes. | a scanning electron microscopic study was performed on the surface ultrastructure of pygidiopsis summa (digenea: heterophyidae) adults. metacercariae were collected from gills and muscles of mullets (mugil cephalus) caught in a known endemic area, and adult flukes were harvested from dogs after 8 weeks of experimental infection. the worm was calabash form with its posterior part broader than the anterior part. tegumental spines were densely distributed over the body surface, except on the sucker ... | 2002 | 12325439 |
| growth and development of pygidiopsis summa in rats and mice with a supplementary note on its morphological characters. | the growth and development of pygidiopsis summa were studied in experimental rats and mice, and a special reference was given to its morphological characters differed from the type species, p. genata. the metacercariae were obtained from young mullets (mugil sp.), and total 21 rats and mice infected each with 1,000 metacercariae. worms of various ages of infection, from 3 to 28 days, were subjected to a microscopic observation. the worms grew rapidly and remarkably in size up to 10 days of infec ... | 1986 | 12886108 |
| 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 ... | 1985 | 12888661 |
| 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 ... | 1984 | 12891010 |
| 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, ... | 2004 | 15569794 |
| 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 ... | 2005 | 16192750 |
| 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 ... | 2006 | 16514276 |
| 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 ... | 2006 | 16514291 |
| redescription and surface ultrastructure of pygidiopsis macrostomum (digenea: heterophyidae). | pygidiopsis macrostomum travassos, 1928, a poorly known species originally described from a single specimen from rattus norvegicus (erxleben, 1777) in brazil, is redescribed on the basis of metacercariae from the mesenteries of naturally infected guppies poecilia vivipara bloch and schneider, 1801 (poeciliidae), and adults obtained from an experimental infection of hamsters. pygidiopsis macrostomum is characterized by the absence of oral spines, vitellaria extending forward to ventral sucker, ut ... | 2005 | 17089767 |
| 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 ... | 2007 | 17374976 |
| 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 ... | 2007 | 17374977 |
| 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 ... | 2007 | 17876166 |
| prevalence of zoonotic metacercariae in two species of grouper, epinephelus coioides and epinephelus bleekeri, and flathead mullet, mugil cephalus, in vietnam. | fishborne zoonotic metacercariae have not been reported from brackish water and marine fish from vietnam waters although these parasites are common in the country's freshwater fish. both wild-caught and cultured grouper (epinephelus coioides and epinephelus bleekeri), and mullet (mugil cephalus) from brackish and marine waters located in khanh hoa province in central coastal vietnam were examined, and found positive for zoonotic trematode metacercariae. from grouper, heterophyopsis continua and ... | 2008 | 18552542 |
| 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 ... | 2009 | 19488429 |
| 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 ... | 2009 | 19885326 |
| 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 ... | 2010 | 20585529 |
| endoparasites of the raccoon dog (nyctereutes procyonoides) and the red fox (vulpes vulpes) in denmark 2009-2012 - a comparative study. | invasive species negatively influence the biodiversity of the ecosystems they invade and may introduce pathogens to native species. raccoon dogs have very successfully invaded europe, including, recently, denmark. this study included analyses of gastrointestinal helminths and trichinella spp. from 99 raccoon dogs and 384 native red foxes collected from october 2009 to march 2012. the sedimentation and counting method used revealed that raccoon dogs and foxes harboured 9 and 13 different helminth ... | 2013 | 24533328 |
| 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 ... | 2015 | 25925180 |
| 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 ... | 2012 | 22949747 |
| 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 ... | 2016 | 27658602 |
| 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 ... | 2012 | 22949748 |
| pygidiopsis cambodiensis n. sp. (digenea: heterophyidae) from experimental hamsters infected with metacercariae in mullets from cambodia. | pygidiopsis cambodiensis n. sp. is described based on adult flukes recovered from syrian golden hamsters experimentally infected with metacercariae from mullets (liza macrolepis) purchased at a local fish market in phnom penh, cambodia. the specimens were examined by light and scanning electron microscopy. among the 13 species so far assigned to pygidiopsis, the new species belongs to the summa-type (including pygidiopsis pelecani, pygidiopsis phalacrocoracis, pygidiopsis piclaumoreli, pygidiops ... | 2016 | 26362645 |
| mucosal immune responses of mice experimentally infected with pygidiopsis summa (trematoda: heterophyidae). | mucosal immune responses against pygidiopsis summa (trematoda: heterophyidae) infection were studied in icr mice. experimental groups consisted of group 1 (uninfected controls), group 2 (infection with 200 metacercariae), and group 3 (immunosuppression with depo-medrol and infection with 200 metacercariae). worms were recovered in the small intestine at days 1, 3, 5, and 7 post-infection (pi). intestinal intraepithelial lymphocytes (iel), mast cells, and goblet cells were counted in intestinal t ... | 2014 | 24623878 |