Angiostrongylus cantonensis, the rat lungworm, is one etiological agent of eosinophilic meningoencephalitis in humans. This zoonosis frequently found Asia and, more recently, North America, Caribbean Island and northeastern South America. Until now, research A. cantonensis southern, southeastern regions Brazil has been natural infections only terrestrial freshwater intermediate snail hosts (Achatina fulica, Sarasinula marginata, Subulina octona, Bradybaena similaris Pomacea lineate). In this...

The rat lungworm Angiostrongylus cantonensis is a worldwide-distributed zoonotic nematode that can cause human eosinophilic meningoencephalitis. Here, for the first time, we report isolation of A. from Achatina fulica two Brazilian states: Rio de Janeiro (specifically municipalities Barra do Piraí, situated at Paraiba River Valley region and São Gonçalo, edge Guanabara Bay) Santa Catarina (in municipality Joinville). lungworms were identified by comparing morphological morphometrical data...

Abstract Background The rat lungworm Angiostrongylus cantonensis can cause eosinophilic meningoencephalitis in humans. This nematode’s main definitive hosts are rodents and its intermediate snails. parasite was first described China currently is dispersed across several Pacific islands, Asia, Australia, Africa, some Caribbean islands most recently the Americas. Here, we report genetic variability among A. isolates from different geographical locations Brazil using mitochondrial cytochrome c...

Abstract One hundred and eighty specimens of sigmodontine rodents living in sympatric conditions were collected the Atlantic Forest state Rio de Janeiro, Brazil (25 Akodon cursor , 98 montensis 57 Oligoryzomys nigripes ) to examine whether helminth structure component communities can be characterized among these three closely related rodents. The parasite species richness was 9 A. 12 O. . Five common rodent species, eight trichostrongylids – Stilestrongylus eta S. aculeata lanfrediae with...

The nematode Angiostrongylus cantonensis is a zoonotic parasite and the most important cause of eosinophilic meningitis worldwide in humans. In Brazil, this disease has been reported states Espírito Santo Pernambuco. detected naturally infected intermediate host, Rio de Janeiro, Pernambuco Santa Catarina. murid Rattus norvegicus R. rattus were recently to be Brazil. study, we conducted two-year investigation dissemination pattern A. an urban area Janeiro state, examined influence...

The influence of habitat structure on helminth communities three sigomdontinae rodent species (Akodon cursor, A. montensis and Oligoryzomys nigripes) was investigated in forest fragments within an agricultural landscape south-eastern Brazil. This is a pionner study correlating the occurrence hosts with microhabitat characteristics. Rodents were collected from 12 continuous conserved area. Up to 13 nematode, cestode two trematode identified, fragmentation found have more composition O....

Abstract The Pantanal is a large ecosystem located in South America. This preserved area seasonally flooded due to abundant rainfall during the summer and subsequent overflow of Paraguai River. In this paper, we examine helminth community structure wild rodent Thrichomys pachyurus wet dry seasons two locations cattle ranching areas Southern Pantanal. We identified 12 species helminth, and, although did not find any differences richness between within Pantanal, found that was higher season....

Abstract Rattus norvegicus has attracted much attention because of its role as a reservoir zoonotic pathogens. This work aimed to identify the intestinal helminth species in R. and analyse effects temperature, rainfall, host age sex on community structure. Moreover, this study investigated possible associations among an urban population São Gonçalo, Rio de Janeiro, sampled during rainy dry seasons over span 2 years. A total 112 rats were infected by six helminths. The nematode...

We report the occurrence of nematodes collected from gut roadkilled crab-eating foxes (two adult males and one juvenile female), Cerdocyon thous (Linnaeus, 1766), found on BR 262 highway in Mato Grosso do Sul state, Brazil 2011. Three helminth species were identified: Ancylostoma buckleyi, Pterygodermatites (Multipectines) pluripectinata, Ascaridia galli. These are reported for first time to infect C. Brazilian Pantanal wetlands, thereby expanding their geographical distribution.

Abstract Rhipicephalus sanguineus Latreille (1806) (Ixodida: Ixodidae) is considered to be the most widely distributed tick and have a vast range of habitats hosts, including livestock, pets wildlife. In addition morphological differences, recent investigations using approaches based on molecular genetic markers revealed existence different R. lineages in geographic regions. this study, 475 ticks collected from dogs western Iberian peninsula were studied both morphologically genetically, 12S...

Nematodes of the genus Physaloptera are globally distributed and more than 100 species known. Their life cycle involves insects, including beetles, cockroaches crickets, as intermediate hosts. This study describes a new reports molecular phylogenetic analyses to determine its relationships within family Physalopteridae. amazonica n. sp. is described from stomach caviomorph rodent Proechimys gardneri collected in Amazon rainforest state Acre, Brazil. The characterized by male having first...

Abstract The helminth fauna and metacommunity structure of eight sympatric sigmodontine rodents were investigated at the Serra dos Órgãos National Park, an Atlantic Forest reserve located in State Rio de Janeiro, southeast Brazil. Rodents species Abrawayaomys ruschii, Akodon montensis, Blarinomys breviceps , Delomys dorsalis, Oligoryzomys flavescens, nigripes, Oxymycterus quaestor Thaptomys nigrita found infected with helminths. montensis presented highest total richness, six different...

Angiostrongylus lenzii n. sp. (Nematoda: Metastrongyloidea) is described and illustrated from the pulmonary artery of wild rodent Akodon montensis Thomas, 1913, collected in municipality Teresopólis, Rio de Janeiro State, Brazil. It represents 17th species genus 2nd South America as parasites rodents. This new most similar morphologically to vasorum, gubernaculatus, schmidti, morerai. can be distinguished them by morphology caudal bursa, ventral rays 2 3 with conspicuous knobs, differences...

Raillietina celebensis is a cestode that parasitizes the small intestine of rats and humans. Here, we detail morphology morphometry R. based on specimens collected from Rattus norvegicus in municipality São Gonçalo, state Rio de Janeiro, Brazil, by light confocal scanning laser microscopies also report results molecular phylogenetic analyses to determine its relationships within family Davaineidae. Analysis number size testes, shape rostellar hooks, cirrus sac length, capsules eggs per...

Abstract The role of environmental factors and landscape heterogeneity on species distribution different spatial scales is one the most important questions in community ecology. Variations gradient characteristics, host attributes may influence parasites distribution. helminth metacommunity 12 small mammal was investigated an Atlantic Forest reserve located State Rio de Janeiro, southeast Brazil. We evaluated variables, mammals, considering infracommunity component levels. Twenty-nine...

The nematode Calodium hepaticum (syn. Capillaria hepatica) is a zoonotic helminth found mainly infecting rats. It was studied the prevalence of C. infection in Rattus norvegicus an urban area Rio de Janeiro (Brazil), with low planning and sanitation. presence identified through visible yellowish-white lesions liver tissue histological analyses. total 45%, no significant differences between sex age. infected rodents near peridomestic poses substantial risk to human health.

Abstract Nematode species of the genus Contracaecum Railliet & Henry, 1912 have been reported around world in many fish-eating birds and seals. Here, jorgei n. sp. is morphologically described using light scanning electron microscopy for adults fourth-stage larvae (L4) found bird Nannopterum brasilianus third-stage (L3) freshwater fish Hoplias argentinensis , both from province Córdoba, Argentina. Additionally, sequences cytochrome c oxidase subunit II were obtained these specimens...

Angiostrongylus cantonensis is a nematode parasite that resides in the pulmonary arteries of rodents, serving as its definitive hosts. The life cycle involves several species non-marine gastropods intermediate hosts, and African giant snail Achatina fulica considered one most important around world. Experimental data concerning A. infection remains notably limited. This helminth causes eosinophilic meningitis or meningoencephalitis humans, representing an emergent zoonosis Brazil....

Stilestrongylus lanfrediae n. sp. is described from the small intestine of Oligoryzomys nigripes (Cricetidae: Sigmodontinae) collected in Atlantic Forest (Rio de Janeiro State, Teresópolis, Brazil). The new species shows some similarities to stilesi, freitasi, inexpectatus, moreli, and andalgala, but it can be distinguished these by following combination characters: 26 ridges males 25 females at mid-body, asymmetrical caudal bursa with a pattern type 2-2-1, rays 6 markedly shorter than other...