| metagonimus miyatai sp. nov. (digenea: heterophyidae), a new intestinal trematode transmitted by freshwater fishes in japan and korea. | metagonimus miyatai n. sp. (digenea: heterophyidae) is described based on adult flukes collected from experimental dogs and hamsters fed with metacercariae encysted in the sweetfish, plecoglossus altivelis, dace, tribolodon hakonensis and t. taczanowskii, common fat-minnow, morocco steindachneri, pale chub, zacco platypus, and dark chub, zacco temmincki, and on those collected from naturally infected humans. the new species was morphologically compared with m. yokogawai and m. takahashii obtaine ... | 1997 | 9446902 |
| surface ultrastructure of metagonimus miyatai metacercariae and adults. | a scanning electron microscopic study was performed to observe surface ultrastructures of excysted metacercariae and adults of metagonimus miyatai. metacercariae were collected from the scale of the pale chub (zacco platypus), and adult flukes were harvested 1-4 weeks after infection to rats. in excysted metacercariae, the oral sucker was devoid of tegumental spines and had type i and type ii sensory papillae. anteriorly to the ventral sucker, spines were dense and digitated into 5-7 points, whe ... | 1998 | 9868886 |
| life cycle and morphology of metagonimus miyatai (digenea: heterophyidae) from nagano, japan. | the life cycle of metagonimus miyatai saito, chai, kim, lee and rim, 1997 (digenea: heterophyidae) was studied in the hiroi river at kotobuki, iiyama city, nagano prefecture, central japan. daughter rediae and cercariae were found in semisulcospira libertina (gould) and s. dolorosa (gould) (gastropoda: pleuroceridae). metacercariae were found encysted in phoxinus lagowskii steindachneri sauvage (osteichthyes: cyprinidae). cercariae were experimentally exposed to p. lagowskii steindachneri, and m ... | 2002 | 12243781 |
| geographical distribution of metagonimus yokogawai and m. miyatai in shizuoka prefecture, japan, and their site preferences in the sweetfish, plecoglossus altivelis, and hamsters. | sweetfish, plecoglossus altivelis, obtained from 18 rivers in shizuoka prefecture were examined for metacercarial infection of 2 flukes, metagonimus yokogawai and metagonimus miyatai. the infection rate and density of metacercariae in the fish were higher in eastern and western regions than in central region of the prefecture. after infection of hamsters with metacercariae derived from the scale, 98.7% of the adult worms obtained from the intestine was found to be m. miyatai. conversely, from in ... | 2006 | 16807078 |
| 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 |
| 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 ... | 2015 | 25944352 |
| metagonimus yokogawai (trematoda: heterophyidae): from discovery to designation of a neotype. | metagonimus yokogawai (katsurada, 1912) katsurada, 1912 (trematoda: heterophyidae) is parasitic in the small intestine of mammals including man and birds in far eastern russia, korea, japan, china, and taiwan. in the present study, the metacercariae and adults of m. yokogawai were redescribed to designate a neotype of this fluke together with reviews of previous studies including study histories from the first discovery to now. we particularly, attempted to review the study histories and morphol ... | 2015 | 26537043 |
| fecundity reduction of balb/c mice after survival from lethal neodiplostomum seoulense infection. | neodiplostomum seoulense (digenea: neodiplostomidae), an intestinal trematode infecting humans and rodents, is known to be highly pathogenic and lethal to experimentally infected mice. only a small proportion of mice can survive from its infection. this study aimed to assess the reproductive capacity of surviving balb/c mice. the fertility of male and female mice, birth time (period from mating to birth of litters), number of litters, size and weight of testes or ovary-oviduct-uterus, apoptosis ... | 2016 | 26857130 |
| susceptibility of inbred mouse strains to infection with three species of metagonimus prevalent in the republic of korea. | susceptibility of inbred mouse strains to metagonimus yokogawai, metagonimus miyatai, and metagonimus takahashii infections was studied using balb/c, ddy, c57bl/6j, c3h/hen, and a/j mice, with h-2 haplotypes d, s, b, k, and a, respectively. two hundred metacercariae were orally fed to each mouse, and the worm recovery rates (wrr), worm dimensions, and intrauterine egg numbers were measured at days 3, 7, 14, 21, and 28 postinfection (pi). on day 14 pi, the wrr of m. yokogawai was highest in ddy m ... | 2005 | 15856865 |