| experimental population dynamics of rhabdias bufonis (nematoda) in toads (bufo bufo): density-dependence in the primary infection. | density-dependence in worm establishment, numbers, biomass and larval production were examined in primary infections of 0, 10, 40, 80 and 160 larvae of the lung nematode, rhabdias bufonis in the common toad, bufo bufo. the infection procedure established 4 non-overlapping levels of infection which persisted until 6 weeks post-infection (p.i.), after which there was an overall decline up to 12 weeks p.i. worm numbers had no direct effect on adult worm survival but temporal changes in worm weight ... | 1992 | 1614734 |
| parasitic disease in amphibians: control by the regulation of worm burdens. | this review considers three case studies based on macroparasites of anurans: (a) natural infections in the permanently-aquatic xenopus laevis which represent the worm burdens acquired, and the implications for pathology, when hosts are exposed to continuous, year-round, transmission; (b) the desert toad, scaphiopus couchii, which experiences invasion very briefly each year and provides a simplified system involving only a single significant infection (pseudodiplorchis americanus); (c) the mesic ... | 1995 | 8632921 |
| longevity and ageing in parasitic and free-living nematodes. | in the developing field of biological gerontology, rapid advances have recently been made in the genetics of ageing in the nematode caenorhabditis elegans. the aim of this work is to develop an understanding of the general mechanisms determining the ageing process. within the last decade the prospect of actually achieving this somewhat hubristic aim has begun to look startlingly real. in this context, knowledge of every aspect of the biology of ageing in nematodes is of added interest. here the ... | 2000 | 11708211 |
| endohelminth fauna of the marsh frog rana ridibunda from lake hazar, turkey. | in this study, 236 marsh frogs rana ridibunda collected from lake hazar (elazig, turkey) at 15 d intervals between march 2001 and february 2002 were examined for endohelminths; of these, 148 (62.71%) frogs were found to be infected with helminths. in total, 9 helminth species (3 trematodes, 5 nematodes and 1 acanthocephalan) were identified. we observed gorgoderina vitelliloba (prevalence 2.97%) in the urinary bladder, haematoloechus variegatus (4.66%) and rhabdias bufonis (8.90%) in the lung, p ... | 2006 | 17190203 |
| a metazoan parasitological research of some iraqi amphibians. | the incidence and intensity of metazoan parasites in 3 species of iraqi amphibians were studied. the amphibians were rana ridibunda, bufo viridis and hyla arborea. twenty-four species of helminths were encountered, including 16 trematodes, 1 cestode and 7 nematodes. their respective names are: polystoma integerrimum, prosotocus confusus, p. fuelleborni, pleurogenoides gastroporus, p. medians, sonsinotrema tacapense, opisthioglyphe ranae, haplometra cylindracea, haematoloechus volgensis, h. vitel ... | 2007 | 18224630 |
| [helminth fauna of bufo raddei in transbaikalia]. | helminth fauna of bufo raddei from transbaikalia has been studied in 2003-2007. eleven species of parasites nematoda were found in this host, namely rhabdias bufonis (schrank, 1788), oswaldocruzia filiformis (goeze, 1782), oswaldocruzia yezoensis morishita, 1926, contracaecum osculatum (rudolphi, 1802), raphidascaris acus, larvae, aplectana acuminata (schrank, 1788), aplectana multipapillosa ivanitzky, 1940, cosmocerca commutata (diesing, 1851), cosmocerca ornata (dujardin, 1845), cosmocercoids ... | 2010 | 20536007 |
| the helminth fauna study of european common brown frog (rana temporaria linnaeus, 1758) in the volga basin. | in this paper we considered information on the helminth fauna of the european common brown frog (rana temporaria linnaeus, 1758) from 10 regions of the volga basin. this study includes consolidated data of different authors over the last 30 years, supplemented by the results of our own research. there are reliably known finds of 29 species of helminths: monogenea - 1, trematoda - 21, nematoda - 7. trematodes gorgodera asiatica pigulevsky, 1945, paralepoderma cloacicola (luhe, 1909), mtc. and nem ... | 2014 | 25119361 |
| negative effects of rhabdias bufonis (nematoda) on the growth and survival of toads (bufo bufo). | the growth and survival of juvenile toads, bufo bufo, infected with a common lung nematode, rhabdias bufonis, were studied. toads were raised from tadpoles in the laboratory and infected 2 months after metamorphosis. individual toads were exposed to doses of 10, 40, 80 or 160 larvae, which enabled examination of the hypothesis that parasite-induced mortality is affected by worm numbers. growth of infected toads began to diverge from that of uninfected controls at 6 weeks post infection (wpi) and ... | 1992 | 28312868 |
| respiration and carbohydrate energy metabolism of the lung-dwelling parasite rhabdias bufonis (nematoda: rhabdiasoidea). | an investigation of the carbohydrate energy metabolism of rhabdias bufonis, the lung-dwelling nematode parasite of the african toad, bufo regularis, indicates that the nematode stores very little glycogen (0.137 +/- 0.003% on a fresh weight basis) but does utilize oxygen in vitro. the intracellular distribution and high levels of activity observed for the enzymes phosphoenolpyruvate carboxykinase, pyruvate kinase, lactate dehydrogenase, malate dehydrogenase, malic enzyme and fumarate reductase s ... | 1978 | 564016 |
| description and phylogenetic position of a new species of rhabdias stiles et hassall, 1905 (nematoda: rhabdiasidae) from the banded rubber frog, phrynomantis bifasciatus (smith) (amphibia: microhylidae), in south africa. | the lung-dwelling nematode rhabdias engelbrechti sp. n. was found in five of eight examined banded rubber frogs in limpopo province, south africa. the species is differentiated from species of rhabdias stiles et hassall, 1905 occurring in the afrotropical realm based on the presence of a globular cuticular inflation at the anterior end, the buccal capsule walls being distinctly divided into anterior and posterior parts, the buccal capsule size (6-9 μm × 16-18 μm), and the body length (3.8-6.1 mm ... | 2017 | 29266002 |
| [the data on helminth infestation of the siberian tree frog (rana amurensis boulenger, 1886) in the western boundary of the range]. | helminth species composition and infection rates of the siberian tree frog rana amurensis in western siberia were studied. four species of helminthes--nematodes rhabdias bufonis, oswaldocruzia filiformis, cosmocerca ornata and the trematode haplometra cylindracea were found. prevalence of helminths in the siberian tree frog is 100%, and mean abundance is 27.5 +/- 4.8. helminth species richness in the siberian tree frog in the western periphery of their distribution area is lower than in the cent ... | 2014 | 25272465 |
| infective larvae of rhabdiasidae (nematoda): comparative morphology of seven european species. | the morphology of infective third-stage larvae of rhabdias bufonis, r. rubrovenosa, r. sphaerocephala, r. fuscovenosa, r. elaphe, entomelas entomelas and e. dujardini is described. the sheath structure in the studied larvae appeared to be similar to that described in other species of the family rhabdiasidae, its chequered aspect being caused by a combination of outer longitudinal striations and inner longitudinal as well as transverse ridges. the larvae were similar in general morphology but dif ... | 2014 | 24570048 |
| studies on gut ultrastructure and digestive physiology in rhabdias bufonis and r. sphaerocephala (nematoda:rhabditida). | | 1971 | 4929390 |
| histochemical and ultrastructural observations on rhabdias bufonis. | | 1967 | 5625918 |