| the epidemiology of fasciola hepatica infections in sheep on a lymnaea columella habitat in the manawatu. | | 1976 | 1063942 |
| [miracidial attraction by biomphalaria straminea, lymnaea columella and physa sp on miracidia of schistosoma mansoni bh strain]. | the attraction exercised over schistosoma mansoni miracidia by biomphalaria straminea, lymnaea columella and physa sp using a specially designed apparatus consisting of two circular glass chambers joined by an open channel were studied. the molluscs or their snail-conditioned water (scw) was placed in one of the chambers (randomly chosen). in the channel ten miracidia was deposited and the count of miracidia in each of the three compartments (the two chambers and the channel) was recorded during ... | 1991 | 1784956 |
| [lymnic molluscs from an alto araguaia area (brazil)]. | an analysis was carried out to determine the natural population of freshwater molluscs from 5 municipalities within the area of influence of the couto magalhães hydroelectric project. these municipalities cover a large area of the state of goiás and mato grosso do sul (brazil). in this study 624 molluscs of the following species were examined: drepanotrema anatinum, d. lucidum, d. depressissimum, biomphalaria straminea, d. schrammi, physa marmorata, lymnaea columella, pomacea and eupera. one to ... | 1991 | 1820602 |
| epidemiology of fasciola hepatica infection in the paraíba river valley, são paulo, brasil. | the study revealed that although lymnaea columella and stenophysa marmorata were found in the same habitat, only l. columella harbored intramolluscan stages of f. hepatica. the population density of l. columella cyclically decreased between september and february, and increased from march to september. the drought that occurred between june and november 1981 dramatically reduced the number of snails collected. larger snails were collected in march-july and november-december, while the smaller sn ... | 1986 | 3564331 |
| the uptake and distribution of radioselenium in the larvae of fasciola hepatica and its snail host lymnaea columella. | radiolabeled metacercariae of fasciola hepatica were obtained in vivo by incubating infected lymnaea columella snails with 20 muci radioselenomethione (75se-m) per snail in 5 ml of water for 5 h, or in vitro by incubating a batch of unlabeled f. hepatica metacercariae with 75se-m for 24 h. radioassay showed that only 5% of the 75se-m was incorporated into maritas (juvenile flukes) from the in vivo labeled metacercariae. the inner cyst wall of in vivo labeled metacercariae contained 46% of the to ... | 1986 | 3776076 |
| early migration of radiolabeled larvae of fasciola hepatica in the mouse. | metacercariae of fasciola hepatica were labeled with 75se by exposure of infected lymnaea columella to 75se-m, 20 muci/snail, in 5 ml of water. seventy-two mice were inoculated with 50 75se-labeled metacercariae. at intervals after infection, the distribution of metacercariae in gut, body cavities and liver was studied by compressed organ autoradiography, and a variant of this technique adapted to gut content and body cavity washes. ag degree focus counts from autoradiograms expressed as percent ... | 1986 | 3776077 |
| the occurrence of the snail lymnaea columella on grazing areas in new south wales and studies on its susceptibility to fasciola hepatica. | field surveys were carried out in the lismore and casino area for the presence of fresh water snails potentially responsible for the transmission of trematodes in ruminants. although the north american snail, lymnaea columella has previously only been reported from metropolitan areas, large populations of the snail were found east of lismore. natural infection with f. hepatica was detected in some of the snails and laboratory studies showed that this snail species was highly susceptible to infec ... | 1985 | 4004661 |
| a survey of fascioliasis in beef cattle killed at abattoirs in southern queensland. | the overall prevalence of fascioliasis in beef cattle found in an abattoir survey completed in may 1983 in southern queensland, was 1.1%. prevalence was 36% in the stanthorpe shire, varied from greater than 1 to 10% in 12 shires and was 1% or less in 24 shires. fascioliasis was not recorded from the other 46 shires in the area of the survey. prevalence was less than 1% in female cattle of all ages. in males, prevalence increased with age from 0.6% in 17-month-old cattle to 4.7% in 4-year-old cat ... | 1985 | 4084144 |
| [occurrence of natural infection of fasciola hepatica linnaeus, 1758 in lymnaea columella say, 1817 in the paraiba river valley, brazil]. | | 1980 | 7221470 |
| [experimental infection of lymnaea columella by fasciola hepatica]. | | 1980 | 7433872 |
| [occurrence of lymnaea columella (gastropoda: lymnaeidae), intermediate host of fasciola hepatica, for the state of paraíba, brazil]. | | 1998 | 9713125 |
| [lymnic snails from the microregion of belo horizonte, minas gerais, brazil with an emphasis on parasite disease vectors]. | a malacological survey to detect foci of transmission of schistosomiasis and other parasitic diseases was undertaken into water-courses from 13 municipalities of microregion of belo horizonte, mg, brazil. from 1990 to 1996, 22,066 snails were collected. from those, 378 (1.7%) were found infected by trematodes: biomphalaria glabrata (7,920), infected by schistosoma mansoni (1.9%), echinostomatidae (1.2%), strigeidae (0.6%), cercaria minense (0.1%) and derogenidae (-0.1%); b. straminea (4,093) inf ... | 1998 | 9789443 |
| rearing of lymnaea columella (say, 1817), intermediate host of fasciola hepatica (linnaeus, 1758). | the intermediate host of fasciola hepatica, lymnaea columella, collected in belo horizonte, minas gerais, brazil, was reared in our laboratory. the aim of the current study was to standardize a rearing and maintenance technique. two kinds of diet were tested: fresh lettuce (a) and rodent ration + 10% caco3 plus fresh lettuce (b). the age for the beginning of oviposition ranged from 27 to 57 days. ten days after oviposition at 24.7 degrees c, 100% eclosion occurred. the complete life cycle varied ... | 2000 | 10998227 |
| [freshwater snails of the campus of manguinhos, oswaldo cruz foundation, rio de janeiro, rj]. | a survey of freshwater gastropods of the campus of manguinhos, fundação oswaldo cruz, rio de janeiro, was carried out during the last two years aiming to compare the current species with those found at the beginning of this century. among 18 breeding sites in 880,000m2 of the surveyed area, 13 showed the following species: antillorbis nordestensis; biomphalaria glabrata; biomphalaria straminea; lymnaea columella; melanoides tuberculatus; physa cubensis; pomacea glauca and pomacea lineata. notabl ... | 2001 | 11460215 |
| freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: i-- metropolitan mesoregion. | in order to elaborate a planorbid chart of the state of rio de janeiro a survey of freshwater gastropods in the metropolitan mesoregion of this state was performed and revealed the occurrence of 20 species: antillorbis nordestensis (lucena, 1954); biomphalaria glabrata (say, 1818); biomphalaria schrammi (crosse, 1864); biomphalaria straminea (dunker, 1848); biomphalaria tenagophila (orbigny, 1835); burnupia sp.; drepanotrema anatinum (orbigny, 1835); drepanotrema cimex (moricand, 1839); drepanot ... | 2001 | 11586447 |
| biological aspects of a new isolate of echinostoma paraensei (trematoda: echinostomatidae): susceptibility of sympatric snails and the natural vertebrate host. | a new isolate of echinostoma paraensei (lie & basch, 1967) was obtained from a natural vertebrate host, the water rat nectomys squamipes. relationships with sympatric snails, biomphalaria glabrata; physa marmorata and lymnaea columella, as well as allopatric snails and the definitive hosts n. squamipes, mus musculus, rattus norvegicus, mesocricetus auratus and birds were investigated. e. paraensei developed in all sympatric snail species following exposure to one or five miracidia. p. marmorata ... | 2001 | 11688893 |
| aspects of the maintenance of the life cycle of fasciola hepatica in lymnaea columella in minas gerais, brazil. | fascioliasis is a parasitic disease of domestic ruminants that occurs worldwide. the lymnaeid intermediate hosts of fasciola hepatica include lymnaea columella, which is widely distributed in brazil. a colony of l. columella from belo horizonte, mg, was reared in our laboratory to be used in studies of the f. hepatica life cycle, the intermediate host-parasite relationship and development of an anti-helminthic vaccine. in the first experiment 1,180 snails were exposed to miracidia of f. hepatica ... | 2002 | 12048573 |
| [search of natural occurrence of xiphidiocercariae (trematoda) in fresh water snails of nine countries from são paulo state, brazil]. | xiphidiocercariae, aquatic larval stages of some trematodes are considered a potential instrument for biological control of mosquitoes. in this study we evaluated its natural occurrence in campinas region and two places in vale do ribeira (registro and miracatu), são paulo state. snails were obtained from fresh water collections from september 1996 to february 1999. the species collected were lymnaea columella, physa marmorata, biomphalaria tenagophila, biomphalaria sp., drepanotrema cimex, d. l ... | 2001 | 12058671 |
| [schistosomiasis mansoni and distribution of freshwater mollusks in natural bodies of water in niterói, rio de janeiro state, brazil]. | the authors report on the distribution of freshwater mollusks in niterói, rio de janeiro state, brazil, and notification of schistosomiasis cases in this municipality from 1995 to 2000. all breeding sites favorable to freshwater mollusks were surveyed, showing the following species: antillorbis nordestensis (lucena, 1954), biomphalaria straminea (dunker, 1848), biomphalaria tenagophila (orbigny, 1835), drepanotrema anatinum (orbigny, 1835), lymnaea columella say, 1817, melanoides tuberculatus (m ... | 2002 | 12244379 |
| population dynamics of lymnaea columella and its natural infection by fasciola hepatica in the state of minas gerais, brazil. | studies on the population dynamics and natural infection of lymnaea columella by fasciola hepatica were carried out from september 1999 to december 2000 in a low-lying area near itajubá in the brazilian state of minas gerais. a total of 626 snails were collected monthly at nine different sites, counted, and dissected to search for larvae of f. hepatica. the highest populations of l. columella were reached in october of 1999 and august of 2000, and the highest natural infection rates of snails by ... | 2003 | 12590657 |
| molluscicidal action of the latex of euphorbia splendens var. hislopii n.e.b. ("christ's crown") (euphorbiaceae) against lymnaea columella (say, 1817) (pulmonata: lymnaeidae), intermediate host of fasciola hepatica linnaeus, 1758 (trematode: fasciolidae): 1- test in laboratory. | the latex action of euphorbia splendens var. hislopii (christ's crown) against snails lymnaea columella, intermediate host of fasciola hepatica, derived from irrigation ditches of the station of pisciculture at universidade federal rural do rio de janeiro, was studied in the laboratory. lab bioassays, using aqueous solutions of the latex, varying between 0.1 and 10 mg/l, have proven molluscicidal activity of the product collected on the same day the tests were performed, during the four seasons ... | 2003 | 12937774 |
| first report of lymnaea columella say, 1817 (pulmonata: lymnaeidae) naturally infected with fasciola hepatica (linnaeus,1758) (trematoda: digenea) in argentina. | we report the first evidence of natural infection of lymnaea columella with fasciola hepatica in argentina. a sample of 601 snails was collected in may 2003 in northeastern corrientes, a province bounded on the north by paraguay, on the east by brazil and on the southeast by uruguay. among 500 examined snails, 44 (8.8%) were exclusively infected with f. hepatica. parasite identification was based on morphological features of cercariae from snails, and of eggs and adult flukes from wistar rats. w ... | 2004 | 14762513 |
| activity of euphorbia splendens var. hislopii n.e.b. (euphorbiaceae) latex against lymnaea columella (say, 1817) (pulmonata: lymnaeidae), intermediate host of fasciola hepatica, linnaeus, 1758 (trematoda: fasciolidae). 2: limited field-testing. | the molluscicidal evaluation of euphorbia splendens var. hislopii (crown of thorns) against lymnaea columella snails, intermediate host of fasciola hepatica, in irrigation ditches of the pisciculture station at universidade federal rural do rio de janeiro, was studied under limited field conditions. an aqueous solution of the latex at 5 mg/l was tested in two irrigation ditches (experimental and control ditches), after initial sampling of the snail population present. twenty-four hours after app ... | 2004 | 14762529 |
| morphology of the rediae of echinostoma paraensei (trematoda: echinostomatidae) from its intermediate host lymnaea columella (mollusca, gastropoda). | the morphology of the rediae of echinostoma paraensei obtained from lymnaea columella was studied using light, scanning and transmission electron microscopy. the measurements of the mature rediae differ from those described originally, and the taxonomic importance of the ambulatory buds and papilliform process is discussed. uniciliated papillae were observed in the mouth region. the birth papilla is a bulb-like structure, well defined at the anterior end of the body of the rediae, which opens th ... | 2004 | 15127294 |
| freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: iv - sul fluminense mesoregion. | in this paper, the forth of a series dealing with the survey of freshwater gastropods of the state of rio de janeiro, the results of collections carried out in the sul fluminense mesoregion from 2000 to 2002 are presented and revealed the occurrence of 18 species: antillorbis nordestensis; biomphalaria glabrata; biomphalaria peregrina; biomphalaria straminea; biomphalaria tenagophila; drepanotrema anatinum; drepanotrema cimex; drepanotrema lucidum; ferrissia sp.; gundlachia ticaga; gundlachia sp ... | 2004 | 15273799 |
| detection of lymnaea columella infection by fasciola hepatica through multiplex-pcr. | from complete mitochondrial dna sequence of fasciola hepatica available in genbank, specific primers were designed for a conserved and repetitive region of this trematode. a pair of primers was used for diagnosis of infected lymnaea columella by f. hepatica during the pre-patent period simultaneously with another pair of primers which amplified the internal transcribed spacer (its) region of rdna from l. columella in a single multiplex-pcr. the amplification generated a ladder band profile speci ... | 2004 | 15322633 |
| freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: v -- norte fluminense mesoregion. | in this paper, the fifth of a series dealing with the survey of freshwater gastropods of the state of rio de janeiro, the results of collections carried out in the norte fluminense mesoregion from 2002 to 2003 are presented and revealed the occurrence of 19 species: antillorbis nordestensis; burnupia sp.; biomphalaria tenagophila; drepanotrema anatinum; drepanotrema cimex; drepanotrema depressissimum; drepanotrema lucidum; ferrissia sp.; gundlachia ticaga; gundlachia sp.; heleobia sp.; hebetancy ... | 2004 | 15486644 |
| the use of the polymerase chain reaction and restriction fragment length polymorphism technique associated with the classical morphology for characterization of lymnaea columella, l. viatrix, and l. diaphana (mollusca: lymnaeidae). | the specific identification of lymnaeid snails is based on a comparison of morphological characters of the shell, radula, renal and reproductive organs. however, the identification is complicated by dissection process, intra and interspecific similarity and variability of morphological characters. in the present study, polymerase chain reaction and restriction fragment length polymorphism (pcr-rflp) techniques targeted to the first and second internal transcribed spacers (its1 and its2) rdna and ... | 2004 | 15543414 |
| the first report in new zealand of lymnaea columella say (mollusca: gastropoda) an intermediate host of the liver fluke fasciola hepatica l. | | 1969 | 16030663 |
| bovine fascioliasis in the manawatu: epidemiology and farmer awareness. | the prevalence of fasciola hepatica was found to be 5.1% in slaughtered cattle originating from the palmerston north veterinary district. approximately 4% of beef breeding, 7% of dairy and 21% of drystock herds showed evidence of infection. of 34 dairy herd and 14 beef breeding herd owners, 0 and 21% respectively were aware of the presence of fluke on their properties. distribution of affected dairy farms conformed with the ecological requirements of the intermediate host lymnaea columella. the ... | 1987 | 16031380 |
| pcr diagnosis of fasciola hepatica in field-collected lymnaea columella and lymnaea viatrix snails. | fasciolosis, caused by the trematode fasciola hepatica, is a zoonosis of economic importance in livestock that is emerging as a chronic disease in humans. the intermediate hosts are lymnaeid snails, in which diagnosis of infection is traditionally based on cercarial shedding, tissue sectioning and crushing. we developed a pcr assay for the sensitive and specific detection of f. hepatica in field-collected lymnaea sp. snails. a primer pair was designed to amplify a 405 bp fragment of the cytochro ... | 2006 | 16427203 |
| genetic variability of brazilian populations of lymnaea columella (gastropoda: lymnaeidae), an intermediate host of fasciola hepatica (trematoda: digenea). | in brazil, lymnaea columella is the most important intermediate host of fasciola hepatica, the etiological agent of fasciolosis, which is a parasitic disease of veterinarian and human importance. random amplified polymorphic dna (rapd) was used to investigate the genetic variability within and among nine brazilian populations of l. columella comprising 205 individuals. a number of four primers were used for analysis of molecular variance (amova). out of 83 rapd markers, 63 (76%) were polymorphic ... | 2006 | 16469288 |
| effect of the exposure to fasciola hepatica (trematoda: digenea) on life history traits of lymnaea cousini and lymnaea columella (gastropoda: lymnaeidae). | the snails lymnaea columella and lymnaea cousini have both been reported as intermediate hosts of fasciola hepatica in colombia. the effect of the exposure to the parasite on survival, fecundity and size of these snails was evaluated by means of experimental infections and the life history traits of control and exposed groups were compared. infection rates were 82.2 and 34% for l. columella and l. cousini, respectively. a reduction in fitness was observed in both species when exposed to the para ... | 2006 | 16564046 |
| freshwater snails and schistosomiasis mansoni in the state of rio de janeiro, brazil: vi--noroeste fluminense mesoregion. | in this paper, the last of a series dealing with the survey of freshwater gastropods of the state of rio de janeiro, the results of collections carried out in the noroeste fluminense mesoregion from 2002 to 2005 are presented and revealed the occurrence of 20 species: antillorbis nordestensis; biomphalaria glabrata; b. straminea; b. tenagophila; drepanotrema anatinum; d. cimex; d. depressissimum; d. lucidum; ferrissia sp.; gundlachia ticaga; gundlachia sp.; heleobia sp.; idiopyrgus sp.; lymnaea ... | 2006 | 17308776 |
| development of fasciola hepatica in lymnaea columella infected with miracidia derived from cattle and marmoset infections. | the development of fasciola hepatica from two species of definitive hosts, i.e. cattle (bos taurus) and a marmoset (callithrix penicillata) in the snail lymnaea columella was determined based on the production of rediae and cercariae and snail survival rate. more rediae and cercariae at 60-74 days post-infection were produced by snails infected by cattle-derived miracidia (cattle group) than by those infected by marmoset-derived miracidia (marmoset group). among the l. columella parasitized by t ... | 2008 | 18053300 |
| influence of shell size of lymnaea columella on infectivity and development of fasciola hepatica. | experimental infections of lymnaea columella with fasciola hepatica were carried out to determine the influence of shell size on the infection rate and on the outcome of rediae and cercariae. snails were divided into seven groups according to shell size: 2-4 mm, 5-6 mm, 7-8 mm, 9-10 mm, 11-12 mm, 13-14 mm and 15 mm or more. one hundred snails in each group were infected by using four miracidia for each snail. snails with larger shell size showed a lower infection rate, the groups presenting the ... | 2008 | 18275634 |
| sympatric and allopatric combinations of lymnaea columella and fasciola hepatica from southern and south-eastern brazil. | experimental infections of lymnaea columella with fasciola hepatica were carried out to test the effect of sympatric and allopatric combinations between parasite and host, by using snails and flukes from southern and south-eastern brazil. four groups of 50 snails were infected with four miracidia per snail: two groups in sympatric and two groups in allopatric combinations. sympatric combinations between parasite and host were more efficient than allopatric ones when snails from itajubá were used ... | 2009 | 19243641 |
| occurrence of fasciola hepatica (linnaeus, 1758) infection in brazilian cattle of minas gerais, brazil. | fasciolosis is a parasitic disease which is caused by digenetic trematodes, such as fasciola hepatica, and which occurs worldwide. the disease causes significant economic losses in cattle because of the reduction in milk and meat production and because the parasitized livers have no economic value. also, abortion and mortality rates increase. to determine the occurrence and dispersal of f. hepatica in the state of minas gerais, fecal samples were collected from bovines aged 12 months and older b ... | 2009 | 19602313 |
| physiological changes in lymnaea columella (say, 1817) (mollusca, gastropoda) in response to echinostoma paraensei lie and basch, 1967 (trematoda: echinostomatidae) infection. | the physiological interaction between the digenean echinostoma paraensei larvae and the intermediate snail host lymnaea columella was studied. the carbohydrate content was significantly altered in the digestive gland tissue of snails, decreasing after 20 days postinfection. at the end of the prepatent period, the carbohydrate content was reduced by 60% when compared to uninfected snails. the total protein was reduced by 80.01% and 76.42% in the hemolymph and digestive gland, respectively. the en ... | 2009 | 19777261 |
| distribution of lymnaeidae (mollusca: pulmonata), intermediate snail hosts of fasciola hepatica in venezuela. | an extensive malacological survey was carried out between 2005-2009 in order to clarify the exact number of lymnaeid species which may be intermediate hosts of fasciola hepatica in venezuela. four species were discovered during this survey, including two local species: lymnaea cubensis and lymnaea cousini and two exotic species: lymnaea truncatula and lymnaea columella. the most common local species was l. cubensis which was found at 16 out of the 298 sampling sites. this species has a large dis ... | 2009 | 19820844 |
| occurrence of fasciola hepatica (linnaeus, 1758) in capybara (hydrochoerus hydrochaeris) (linnaeus, 1766) in minas gerais, brazil. | fasciola hepatica is a parasite that affects the hepatic ducts of several species of domestic and wild vertebrates, causing huge economic losses to livestock rearing worldwide. reports on occurrences of f. hepatica in capybaras are an important epidemiological aspect of this disease, since these rodents can be a source of contamination for other animals and humans. in the present study, conducted in a rural area of the municipality of confins, minas gerais, fresh feces from capybaras were collec ... | 2016 | 27096531 |
| the population density of lymnaea columella (say, 1817) (mollusca, lymnaeidae) an intermediate host of fasciola hepatica (linnaeus, 1758), in the caparaó microregion, es, brazil. | the aim of this study was to monitor the population density of lymnaea columella, an intermediate host of fasciola hepatica, in various aquatic habitats and in drinking water in the area of the instituto federal de educação, ciência e tecnologia do espírito santo, on caparaó microregion, municipality of alegre, state of espírito santo, brazil. monthly samplings were performed at certain points between drainage areas and drinking water in cattle and goat production systems during the years 2010 t ... | 2016 | 26934156 |
| occurrence of chaetogaster limnaei k. von baer, 1927 (oligochaeta, naididae) associated with gastropoda mollusks in horticultural channels in southeastern brazil. | the aim of this study was to evaluate the presence of chaetogaster limnaei k. von baer, 1927 in four species of mollusks collected in irrigation channels of a horticultural garden in the city of juiz de fora, minas gerais state, southeastern brazil. the collections were made from june 2005 to january 2006. of the four species of mollusks analysed, we could not detect the presence of c. limnaei in pomacea lineata (spix, 1827). there were recorded 320 specimens of c. limnaei in association with ap ... | 2010 | 21180913 |