diversity of the infracommunities of strongylid nematodes in the ventral colon of equus caballus from rio de janeiro state, brazil.nematodes from the ventral colon of 31 adult horses, 24 males and 9 females, in the metropolitan region of the state of rio de janeiro were analysed. there were 53,444 (86.4%) adults of the total recovered strongylid nematodes. they belonged to 21 species of cyathostominae and seven of strongylinae. larval forms made up 13.6% (8407) of the total recovered, and 49% of the strongylid nematodes were observed in ventral colon. the most prevalent and abundant species were cyathostomum tetracanthum, c ...200616406328
evidence of p-glycoprotein sequence diversity in cyathostomins.p-glycoproteins (pgps) are adenosine triphosphate-binding transporter proteins thought to be associated with multi-drug resistance in mammals and protozoans and have been suggested to be involved in the mechanism of ivermectin (ivm) resistance in haemonchus contortus. until now, resistance to ivm has not been reported in cyathostomins in horses in spite of its widespread and frequent use. reasons for this might be differences in the molecular mechanism of the development of resistance. based on ...200415562598
structure of the community of the strongylidae nematodes in the dorsal colon of equus caballus from rio de janeiro state--brazil.the structure of the community of strongylidae nematodes in the dorsal colon of naturally infected horses from the metropolitan region of rio de janeiro state was evaluated in 33 samples. twenty-three species were found: cylicostephanus longibursatus, cylicostephanus goldi, cylicocyclus nassatus and cyathostomum tetracanthum were the central ones; cylicostephanus minutus, cylicostephanus calicatus, cylicocyclus leptostomus, cylicodontophorus bicoronatus and parapoteriostomum euproctus were secon ...200312581589
prevalence, abundance and site distribution of equine small strongyles in normandy, france.forty-two horses from normandy (france) were examined post-mortem for small strongyle infections from october to march. in the positive horses, total worm numbers ranged from 234 to 90,247 (mean 11,297). encysted larvae represented the major part of the total cyathostome burdens with a high percentage (83%) being early third stage larvae. they were mostly recovered from the caecum (48%) and ventral colon (40%) and were less present in the dorsal colon (12%). adult cyathostomes were mainly locate ...200212446091
investigation of diversity and isotypes of the beta-tubulin cdna in several small strongyle (cyathostominae) species.the diversity of the beta-tubulin cdnas of the cyathostominae and the occurrence of further isotypes were examined in adult worms isolated from an anthelmintic-naïve horse. cdnas encoding beta-tubulin from cyathostomum catinatum, cylicocyclus nassatus, cylicocyclus insigne, cylicocyclus radiatus, cylicocyclus elongatus, cyathostomum coronatum, and cyathostomum pateratum were characterized using specific primers developed from the cdna sequence of cc. nassatus. the cdna sequences span 1,429 bp an ...200212197112
cyathostominae (nematoda) parasites of equus caballus in some brazilian states.thirty six horses from nine brazilian states (goiás, minas gerais, pará, maranhão, piauí, paraíba, pernambuco, rio grande do norte, and ceará) were examined for infections by small strongyles. the following species were identified: cylicocyclus nassatus, c. insigne, c. brevicapsulatus, c. leptostomum, c. radiatus, c. ultrajectinus, c. ashworthi, cylicostephanus goldi, c. calicatus, c. minutus, c. longibursatus, petrovinema poculatum, coronocyclus coronatus, c. labiatus, c. labratus, cyathostomum ...199910489198
a comparison of the bioequivalence of 0.5% fenbendazole top dress pellets or 10% fenbendazole oral suspension against a spectrum of equine parasites.a controlled test was conducted to assess the efficacy bioequivalence of a single dose of 0.5% fenbendazole (fbz) top dress pellets to a 10% fbz suspension formulation (panacur suspension 10%, hoechst roussel vet). thirty horses with naturally-acquired parasite infections, in replicates of three, were used. strongyle egg per gram counts were not significantly different (p>0.1) between groups pretreatment, but fbz treated groups were significantly different from the control group post-treatment. ...199910392771
occurrence of gastrointestinal parasites in horses in metropolitan perth, western assess the occurrence of gastrointestinal parasites in horses in perth. to apply polymerase chain reaction (pcr) for the identification of some species of encysted larval cyathostomes.200415088968
possible resistance of small strongyles from female ponies in the netherlands against determine resistance of small strongyles to albendazole, 3 female ponies (group 1) were grazed on a pasture from may to november 1985 and were treated with 7.5 mg of albendazole/kg of body weight, po, 2 days before turnout in may and again in june and in july. three other female ponies (group 2) grazed on a similar pasture from may to july, were treated with 7.5 mg of albendazole/kg, and were removed to another pasture until november. in december, ponies from both groups were treated with 7.5 ...19883421546
the gastro-intestinal parasites community of the przewalski's horse, equus przewalskii poljakov, 1881, and the domestic horse in the chernobyl exclusion zone.a diagnostic deworming of 21 przewalski horses, free-living in the chernobyl exclusion zone ukraine, and of six stabled domestic horses, has been conducted eighteen years after the chernobyl nuclear disaster. this survey yielded 31 species (of 5 families and 3 classes, 28 species of nematodes, 1 species of cestodes, and 2 larvae of botflies). a total 29 and 19 helmith species has been recorded in the przewalski horse and domestic horse respectively. only six helmith species were common for the t ...200617007337
isolation and characterisation of a beta tubulin isotype 2 gene from two species of cyathostomin.this study describes the isolation and characterisation of beta tubulin isotype 2 cdna sequences from two common species of cyathostomin, cylicocyclus nassatus and cyathostomum catinatum. the full-length cdnas for these species were 1709 and 1753 bp in length, respectively, including 1350 bp of sequence inferred to encode 450 amino acids of peptide sequence. they had greatest identity with previously characterised isotype 2 sequences from trichostrongylus colubriformis, cooperia oncophora and ha ...200515777911
in vitro development of cyathostomin larvae from the third stage larvae to the fourth stage: morphologic characterization, effects of refrigeration, and species-specific patterns.a mixed population of equine cyathostomin (nematoda, strongyloidea) infective third stage larvae (l3) was cultured in vitro using a cell-free medium. some l3 were cultured immediately after baermann collection from fecal cultures, while others were kept in water at 4 degrees c for 7 days before initiating the in vitro cultures. cultures were examined daily for viability. at days 2, 7, 14 and 21 larvae were collected for identification of developmental stage and morphological changes, using both ...200919493623
fecundity of various species of strongylids (nematoda: strongylidae)--parasites of domestic horses.the aims of the study were to determine fecundity of several strongylid species parasitizing domestic horses and analyze possible relations between numbers of eggs in female uteri and size of both the eggs and the nematodes as well as the influence of fecundity on proportion of species in the strongylid community. twenty-five specimens from each of 15 strongylid species (strongylus vulgaris, strongylus edentatus, triodontophorus serratus, triodontophorus brevicauda, triodontophorus tenuicollis, ...201222903448
critical tests in equids with fenbendazole alone or combined with piperazine: particular reference to activity on benzimidazole-resistant small critical tests in equids were conducted with single doses of fenbendazole (5 mg kg-1) alone (panacur--american hoechst, somerville, nj); (2 tests with paste and 1 with suspension formulation) or in combination with piperazine (american hoechst); (40 mg base kg-1); (4 tests with paste formulation). the main purpose of the tests was evaluation of activity against benzimidazole-resistant small strongyles (cyathostomum catinatum, cyathostomum coronatum, cylicocyclus nassatus, cylicostephanus g ...19836683041
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