| anurans as paratenic hosts in the transmission of hepatozoon caimani to caimans caiman yacare and caiman latirostris. | prevalence of hepatozoon caimani has been reported in 76% of caimans caiman yacare from the pantanal region. culex (melanoconion) spp. mosquitoes were recently identified as natural vectors of this parasite. however, culicids are not typically eaten by crocodilians, suggesting that the main transmission route is through ingestion of insectivorous vertebrates, such as anurans. the susceptibility of wild frogs leptodactylus chaquensis, leptodactylus podicipinus and scinax nasicus to infection by h ... | 2011 | 21808978 |
| characterization of hepatozoon spp. in leptodactylus chaquensis and leptodactylus podicipinus from two regions of the pantanal, state of mato grosso do sul, brazil. | hepatozoon sp. are parasites that commonly infect frogs and arthropod vectors. this species has variability in the morphological and morphometric characteristics. due to these variations, the naming of the species is thus impaired and only by visualizing the sporogonic cycle in vector and by molecular studies this problem can be solved. recently, the use of molecular genetics has helped the species denomination. in this work, we collected 145 frogs (68 leptodactylus chaquensis and 77 leptodactyl ... | 2015 | 25645008 |
| helminth parasites of leptodactylus podicipinus (anura: leptodactylidae) from south-eastern pantanal, state of mato grosso do sul, brazil. | forty-three specimens of leptodactylus podicipinus (anura: leptodactylidae) were collected in the south-eastern pantanal, municipality of corumbá, state of mato grosso do sul, brazil in february and july 2007, and examined for endoparasites. forty (93%) specimens were infected with at least one helminth species. the predominant parasites were nematodes (aplectana sp., cosmocerca podicipinus, oswaldocruzia lopesi, physalopteroides venancioi, rhabdias sp.), but the trematode catadiscus propinquus ... | 2009 | 19422730 |
| cytogenetic and random ampliied polymorphic dna analysis of leptodactylus species from rural and urban environments (anura, amphibia). | cytogenetic and random amplified polymorphic dna analyses carried out in the species leptodactylus podicipinus, l. ocellatus, l. labyrinthicus, and l. fuscus from rural and urban habitats of the northwest region of são paulo state, brazil, showed that the karyotypes (2n = 22), constitutive heterochromatin distribution and nucleolus organizer region (nor) location did not differ between the populations from the two environments. the in situ hybridization with an rdna probe confirmed the location ... | 2008 | 18393220 |
| the effect of local environmental variables on the helminth parasite communities of the pointedbelly frog leptodactylus podicipinus from ponds in the pantanal wetlands. | understanding the patterns of species distribution and abundance has been at the core of ecology. in general, these patterns are determined by species dispersion as well as by abiotic and biotic environmental conditions. similarly, host-parasite relations and the structure of parasite assemblages are also shaped by environmental conditions and landscape composition. herein, we assessed the influence of environmental variables and parasite species dispersion on the structure of helminth parasites ... | 2012 | 22088134 |
| metacercariae of heterodiplostomum lanceolatum (trematoda: proterodiplostomidae) found in leptodactylus podicipinus (anura: leptodactylidae) from brazil: a morphological, molecular and ecological study. | the trematodes from south american reptiles are poorly known, with only one life cycle completely characterized. we used molecular and morphological methods to characterize diplostomoid metacercariae found in 29 of 86 pointedbelly frogs, leptodactylus podicipinus (cope, 1862) collected in a marsh pond in selvíria, in the central-west region of brazil. the metacercariae were identified as heterodiplostomum lanceolatum dubois, 1936 (proterodiplostomidae), a rarely reported species that matures in ... | 2019 | 31331402 |
| biological drivers of individual-based anuran-parasite networks under contrasting environmental conditions. | understanding the mechanisms driving host-parasite interactions has important ecological and epidemiological implications. traditionally, most studies dealing with host-parasite interaction networks have focused on species relationship patterns, and intra-population variation in such networks has been widely overlooked. in this study, we tested whether the composition of parasite communities of five anuran species (leptodactylus chaquensis, leptodactylus fuscus, leptodactylus podicipinus, pseudi ... | 2020 | 32578526 |
| comparative liver morphology associated with the hepatosomatic index in five neotropical anuran species. | the liver is an important metabolic organ in vertebrates. in anurans, the hepatosomatic index (hsi) reflects differences in energy storage and reproductive activities between males and females. the objective of this study was to describe the histological and histometric parameters of the livers of five species of neotropical anurans, taking sex-related differences into account. we also tested how the relationship between quantitative histometric variables and hsi varied between males and females ... | 2020 | 33073492 |
| larval nematodes found in amphibians from northeastern argentina. | five species of amphibians, leptodactylus podicipinus, scinax acuminatus, s. nasicus, rhinella fernandezae and pseudis paradoxa, were collected in corrientes province, argentina and searched for larval nematodes. all larval nematodes were found as cysts in the serous of the stomach of hosts. were identified one superfamily, seuratoidea; one genus, spiroxys (superfamily gnathostomatoidea) and one family, rhabdochonidae (superfamily thelazioidea). we present a description and illustrations of thes ... | 2010 | 21180919 |
| anuran helminth communities from contrasting nature reserve and pasture sites in the pantanal wetland, brazil. | studies of amphibian macroparasites are relevant for the investigation of parasite community ecology and disease dynamics. here, the parasite communities of five anuran species (hypsiboas raniceps, phyllomeduza azurea, pseudis paradoxa, leptodactylus fuscus and leptodactylus podicipinus) are described from two habitats with different levels of preservation (pasture versus nature reserve). specifically, we used mixed-effect models to test whether helminth species richness, prevalence and abundanc ... | 2017 | 26907856 |
| helminth parasite communities of allopatric populations of the frog leptodactylus podicipinus from pantanal, brazil. | several factors may influence the structure of parasite communities in amphibian hosts. in this study, we describe the helminth parasites of three allopatric populations of the frog leptodactylus podicipinus and test whether host size and sex were determinants of the structure and composition of the helminth communities. one hundred and twenty-three anurans were collected from three different study sites within the pantanal wetlands and surveyed for helminth parasites. we found 14 helminth taxa: ... | 2014 | 23095662 |