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1.
J Helminthol ; 95: e33, 2021 Jul 06.
Artigo em Inglês | MEDLINE | ID: mdl-34227463

RESUMO

The genus Oswaldocruzia Travassos, 1917 includes approximately 90 species that are parasitic on amphibians and reptiles around the world, of which 43 occur in the neotropical region. However, molecular data supporting the taxonomic status of most species of the genus are scarce, and their phylogenetic relationships remain unknown. Using specimens of four molineid taxa (Oswaldocruzia belenensis Santos, Giese, Maldonado Jr. and Lanfredi, 2008; Oswaldocruzia chabaudi Ben Slimane & Durette-Desset, 1996, Oswaldocruzia chambrieri Ben Slimane & Durette-Desset, 1996 and Kentropyxia hylae Feitosa, Furtado, Santos and Melo, 2015) from amphibian hosts collected in different regions of Pará, Brazil, we conducted morphological studies, molecular analyses and phylogenies (maximum likelihood and Bayesian inference) using the cytochrome c oxidase subunity I (Cox1) gene. The newly generated sequences were compared with those of ten publicly available Cox1 sequences of Oswaldocruzia from Mexico. Our findings demonstrated significant differences between the sequences of amazonian specimens and sequences from specimens collected in Mexico, and we suggest that host-parasite cospeciation or habitat use might be related to molineid evolution in amphibian hosts. Additionally, this work presents new hosts and new geographical records for species of Oswaldocruzia from the neotropics.


Assuntos
Molineoidae , Nematoides , Anfíbios , Animais , Teorema de Bayes , Ecossistema , Filogenia
2.
Parasitology ; 148(7): 827-834, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-33685539

RESUMO

Natural and anthropogenic stressors, including parasites and pesticides, may induce oxidative stress in animals. Measuring oxidative stress responses in sentinel species that are particularly responsive to environmental perturbations not only provides insight into host physiology but is also a useful readout of ecosystem health. Newly metamorphosed northern leopard frogs (Lithobates pipiens), a sentinel species, were collected from agricultural and non-agricultural wetlands exposed to varying concentrations of the herbicide atrazine. Significant effects of certain parasites' abundance and their interaction with atrazine exposure on frog oxidative stress were identified. Specifically, increased protein levels were detected in frogs infected with echinostome metacercariae. In addition, the nematode Oswaldocruzia sp. was significantly associated with increased thiol concentration and catalase activity. Significant parasite × atrazine interactions were observed for atrazine exposure and the abundance of Oswaldocruzia sp. on thiol, as thiol concentrations increased with parasite abundance at low atrazine localities and decreased in high atrazine wetlands. In addition, a significant interaction between the abundances of Oswaldocruzia sp. and gorgoderid trematodes on thiol concentrations was observed. These findings demonstrate that studies of oxidative stress on animals in natural ecosystems should account for the confounding effects of parasitism, particularly for amphibians in agricultural landscapes.


Assuntos
Atrazina/toxicidade , Herbicidas/toxicidade , Rana pipiens , Estresse Fisiológico , Infecções por Strongylida/veterinária , Infecções por Trematódeos/veterinária , Animais , Molineoidae/isolamento & purificação , Prevalência , Quebeque/epidemiologia , Infecções por Strongylida/epidemiologia , Infecções por Strongylida/parasitologia , Trematódeos/isolamento & purificação , Infecções por Trematódeos/epidemiologia , Infecções por Trematódeos/parasitologia , Áreas Alagadas
3.
Parasitol Int ; 68(1): 60-62, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-30342118

RESUMO

Lamanema chavezi (Family Molineidae) is a parasitic nematode of South American camelids (SACs). A few studies have reported this parasite in SACs, mainly in domestic camelid species (llama and alpaca). Parasite identification by means of copro-parasitological methods is non-invasive and allows performing epidemiological studies. However, egg misidentification and difficulty to culture third-stage larvae do not allow identifying nematodes to species level. In contrast, molecular tools allow identifying eggs of gastrointestinal nematodes more accurately. However, the little genomic information available in databases for some species prevents an accurate diagnosis. In the present work, L. chavezi females present in feces of llamas from northwestern Argentina were molecularly characterized to obtain genomic information and improve parasitological diagnosis of L. chavezi-like eggs present in guanaco feces from southeastern Argentina. An 833-bp fragment of nuclear ribosomal DNA (rDNA) and a 434-bp fragment of the mitochondrial cytochrome c oxidase subunit 1 (cox1) gene from both L. chavezi females and eggs were amplified and sequenced. Comparison between sequences from females and eggs showed 99-99.6% identity to rDNA and 99.5-96.1% to the cox1 gene fragments, confirming egg morphological assignment. A higher divergence between sequences was observed in the cox1 fragment, with a maximum variation of 3.9%. The examination of eggs found in guanaco feces from southeastern Argentina and their specific molecular identification represent the first record for this host in Argentine Patagonia and contribute to improving the diagnosis of gastrointestinal nematodes in SACs, mainly in wild camelids.


Assuntos
Camelídeos Americanos/parasitologia , DNA Mitocondrial/genética , Fezes/parasitologia , Molineoidae/genética , Proteínas Nucleares/genética , Infecções por Strongylida/veterinária , Animais , Animais Domésticos , Argentina/epidemiologia , DNA de Helmintos , Feminino , Genoma Helmíntico , Molineoidae/isolamento & purificação , Contagem de Ovos de Parasitas , Reação em Cadeia da Polimerase , Análise de Sequência de DNA , Infecções por Strongylida/epidemiologia , Infecções por Strongylida/parasitologia
4.
Syst Parasitol ; 95(8-9): 871-879, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30128687

RESUMO

Leptodactylus paraensis Heyer, is a Neotropical anuran species that inhabits Rainforest habitats in the eastern Amazon, but because it has only been recently separated from the Leptodactylus pentadactylus (Laurenti) species group, little is known about its helminth fauna. This study describes a new species of Oswaldocruzia Travassos, 1917 and records the first occurrence of this genus parasitising L. paraensis and the second species for the Caxiuanã National Forest in the eastern Amazon, Brazil. Oswaldocruzia lanfrediae n. sp. is characterised by having an anterior extremity with a smooth cephalic vesicle divided into two portions, a claviform oesophagus, well-developed cuticular longitudinal ridges and lateral alae. Females have a well-developed ovojector, with didelphic and amphidelphic uteri. Males show complex robust spicules divided into a slightly curved shoe, a bifurcated fork and a blade terminating in 2-3 processes. The new species differs from its congeners especially regarding the lateral alae and the morphology of the spicules, in addition to morphometric characters such as body size, oesophagus length, deirid position, nerve-ring position and relative position of the vulva in females.


Assuntos
Anuros/parasitologia , Molineoidae/anatomia & histologia , Molineoidae/classificação , Animais , Brasil , Feminino , Masculino , Especificidade da Espécie
5.
Acta Parasitol ; 62(3): 575-581, 2017 Sep 26.
Artigo em Inglês | MEDLINE | ID: mdl-28682762

RESUMO

Durettenema guangdongense gen. et sp. nov. is described from Hipposideros larvatus (Horsfield) (Chiroptera: Rhinolophidae) in Guangdong Province, China. The new genus differs from the other genera of subfamily Molineinae in the structure of the synlophe, the absence of lateral alae, the arrangement of the bursa rays, the shape of the spicules, the female tail and the presence of gubernaculum. Meanwhile, considering the morphological characters of Macielia rhinolophi Yin, 1980, including the pattern of the bursa ray, the shape of the spicules, and the female tail, this species should be transferred to the genus Durettenema, as D. rhinolophi (Yin, 1980) comb. nov., which can be distinguished from D. guangdongense in the shape of the ovejector. In addition, the ITS-1 sequences of D. guangdongense were also analysed, these sequence added new data for the molecular diagnosis of trichostrongylid nematodes.


Assuntos
Quirópteros/parasitologia , Molineoidae/classificação , Molineoidae/ultraestrutura , Infecções por Strongylida/veterinária , Animais , Feminino , Masculino , Especificidade da Espécie , Infecções por Strongylida/parasitologia
6.
Zootaxa ; 4263(2): 358-368, 2017 05 09.
Artigo em Inglês | MEDLINE | ID: mdl-28609874

RESUMO

Two new species, Oswaldocruzia lisnykiensis sp. n. and Oswaldocruzia lacertica sp. n., are described from Anguis fragilis L. (Reptilia: Anquidae) and Lacerta agilis L. (Reptilia: Lacertidae) respectively. Both species belong to the Palaearctic group of species which have spicules divided in three main branches (blade, fork and shoe) with fork division above its distal third. The new species differs from all previously known Palaearctic species by several morphological characters: type of caudal bursa (type III in O. lisnykiensis and type I in O. lacertica), shape of spicules (blade distally divided into four tips and specific shape of shoe) and synlophe structure (narrow cervical alae consist of three crests in both species). Illustrated descriptions of O. lisnykiensis and O. lacertica based on 63 and 38 specimens respectively are presented. Host specificity and geographical distribution of the species are discussed. O. dispar is considered as a species inquirenda.


Assuntos
Molineoidae , Animais , Lagartos , Nematoides , Parasitos , Ucrânia
7.
Acta Parasitol ; 61(3): 567-75, 2016 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-27447222

RESUMO

Oswaldocruzia chambrieri Ben Slimane et Durette-Desset, 1993 is redescribed from specimens collected from the small intestine of the South American common toad, Rhinella margaritifera, from Caxiuanã National Forest in Pará, Brazil, using light and scanning microscopy and molecular analysis of Cytochrome Oxidase I (COI) - coding regions of DNA. The discovered nematodes are characterized by a type III caudal bursa with two papillae, rays 4 with a median groove, and spicules divided into a blade, a shoe and a fork. Cervical alae are absent, the cephalic vesicle is divided into two portions, and the synlophe has low ridges without chitinous supports. The present study establishes the Caxiuanã National Forest as a new location for O. chambrieri, which had previously been reported as a parasite of R. margaritifera in Ecuador, uses light microscopy and scanning electron microscopy (SEM) to identify new morphological characters of the species and represents the second molecular sequence deposited for the Oswaldocruzia genus.


Assuntos
Bufonidae/parasitologia , Molineoidae/crescimento & desenvolvimento , Molineoidae/isolamento & purificação , Infecções por Strongylida/veterinária , Animais , Brasil , Florestas , Intestino Delgado/parasitologia , Molineoidae/genética , Infecções por Strongylida/parasitologia
8.
J Parasitol ; 100(5): 646-50, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-24919089

RESUMO

Macuahuitloides inexpectans n. gen., n. sp. (Molineidae: Anoplostrongylinae) is herein described. The description is based on specimens removed from the small intestine of ghost-faced bats, Mormoops megalophylla, from central Mexico. The monotypic genus is unique in featuring sexual dimorphism on the cuticular ornamentation, which consists of the presence of spines on the anterior quarter of females, and of the presence of rugosities on the surface of the cephalic vesicle of males. The cuticular spines are arranged in spiral rings on the anterior quarter of the body, and there is no trace of said structures on the cuticle of males. The synlophe of the males possess 12 ridges, whereas there is no synlophe in females. Finally, females show a prominent caudal terminus (spine) and 3 subterminal tubercles, whereas males show bursal rays in a 3-2 arrangement, with a relatively prominent dorsal ray.


Assuntos
Quirópteros/parasitologia , Molineoidae/anatomia & histologia , Infecções por Strongylida/veterinária , Animais , Sequência de Bases , DNA de Helmintos/química , DNA de Helmintos/isolamento & purificação , Feminino , Intestino Delgado/parasitologia , Masculino , México/epidemiologia , Dados de Sequência Molecular , Molineoidae/classificação , Molineoidae/genética , Molineoidae/isolamento & purificação , Prevalência , Alinhamento de Sequência/veterinária , Caracteres Sexuais , Infecções por Strongylida/epidemiologia , Infecções por Strongylida/parasitologia
9.
J Parasitol ; 100(4): 500-3, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24552210

RESUMO

Moennigia celinae n. sp. collected from the small intestine of Chaetophractus vellerosus and Chaetophractus villosus (Xenarthra, Dasypodidae) from Argentina is herein described. This new species belongs to the genus Moennigia because it possesses a short uterus with few eggs, atrophied distal branch of the ovejector, vulva near the anus, and a conical tail. The new species has a synlophe with 17 symmetrical ridges and slight ventro-dorsal orientation. The spicule length:body length ratio is similar to that of the other species parasitic of Dasypodidae; however, Moennigia celinae n. sp. differs from Moennigia pintoi and Moennigia lutzi because the latter lack a gubernaculum, and from Moennigia complexus, Moennigia moennigi, Moennigia filamentosus, Moennigia intrusa, Moennigia littlei, Moennigia pulchra and Moennigia dessetae by the latter having very complex spicules with 2 or 3 points at the distal extremity. Moreover, Moennigia celinae n. sp. differs from Moennigia virilis by the length and shape of its spicules. Moennigia celinae n. sp. can be distinguished from Moennigia travassosi by the shape of the dorsal ray of the caudal bursa. Moennigia celinae n. sp. resembles Moennigia pseudopulchra but the gubernaculum of the latter is V-shaped. This is the second report of a species of Moennigia in Argentina and the first for the genus Chaetophractus.


Assuntos
Tatus/parasitologia , Enteropatias Parasitárias/veterinária , Molineoidae/classificação , Infecções por Strongylida/veterinária , Animais , Argentina/epidemiologia , Feminino , Enteropatias Parasitárias/epidemiologia , Enteropatias Parasitárias/parasitologia , Intestino Delgado/parasitologia , Masculino , Molineoidae/anatomia & histologia , Molineoidae/isolamento & purificação , Prevalência , Infecções por Strongylida/epidemiologia , Infecções por Strongylida/parasitologia
10.
J Parasitol ; 99(5): 821-6, 2013 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23617773

RESUMO

Macielia jorgei n. sp. is described from Chaetophractus vellerosus from La Rioja, Argentina. Also Trichohelix tuberculata is redescribed in detail. The new species is characterized by parasitizing the small intestine, possessing a bursal membrane and telamon, having complex and sclerotized spicules distally divided into 2 processes, a simple, poorly sclerotized gubernaculum, and synlophe with bilateral symmetry and 12 cuticular ridges. This is the second report of a species of Macielia in Argentina. The synlophe of Trichohelix tuberculata is asymmetric and is characterized by 3 ventral ridges, oriented to the left. The size of these ridges decreases until they disappear at midbody.


Assuntos
Tatus/parasitologia , Enteropatias Parasitárias/veterinária , Molineoidae/classificação , Infecções por Strongylida/veterinária , Animais , Argentina/epidemiologia , Feminino , Enteropatias Parasitárias/epidemiologia , Enteropatias Parasitárias/parasitologia , Intestino Delgado/parasitologia , Masculino , Molineoidae/anatomia & histologia , Prevalência , Infecções por Strongylida/epidemiologia , Infecções por Strongylida/parasitologia
11.
J Parasitol ; 99(3): 509-12, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23098079

RESUMO

Oswaldocruzia lamotheargumedoi n. sp., inhabiting the intestine of the cane toad, Rhinella marina (L.), in Laguna de Coyuca, Guerrero, México, is described here. The new species differs from 10 congeners infecting bufonid hosts because it has a type I bursa. In contrast, 7 of these species have type II bursa and 3 more a type III bursa. The species most similar to the species described herein is Oswaldocruzia pipiens Walton, 1929 . These 2 species share traits such as body size, bursa type, presence of cervical alae, and dorsal ray morphology. Nevertheless, both species can be distinguished based on the number of synlophe ridges at mid-body (54-56 for O. lamotheargumedoi vs. 45-48 for O. pipiens) and by the presence of a chitinous support in the long, and well developed, cervical alae of O. pipiens. In the new species, these structures are short, poorly developed, and lack chitinous support. Previous records of species of Oswaldocruzia in México include Oswaldocruzia subauricularis (Rudolphi, 1819) Travassos, 1917 in the Neotropical Realm and O. pipiens in the Nearctic.


Assuntos
Bufonidae/parasitologia , Molineoidae/classificação , Infecções por Strongylida/veterinária , Animais , Feminino , Enteropatias Parasitárias/epidemiologia , Enteropatias Parasitárias/parasitologia , Enteropatias Parasitárias/veterinária , Intestinos/parasitologia , Masculino , México/epidemiologia , Molineoidae/anatomia & histologia , Molineoidae/ultraestrutura , Prevalência , Caracteres Sexuais , Infecções por Strongylida/epidemiologia , Infecções por Strongylida/parasitologia
12.
J Parasitol ; 98(6): 1209-15, 2012 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22924934

RESUMO

A new species of Biacantha Wolfgang, 1954 (Nematoda: Molineidae), is described from the common vampire bat, Desmodus rotundus Geoffroy and St. Hilaire, 1810, from northwest Argentina. Biacantha normaliae n. sp. Oviedo, Ramallo, and Claps, is characterized by the disposition and number of ridges of the synlophe, the excretory pore located on a knob, 2 lateral processes on the tail of females, the male caudal bursa morphology, and lack of gubernaculum. This is the first species of nematode described in a vampire bat from Argentina.


Assuntos
Quirópteros/parasitologia , Molineoidae/classificação , Infecções por Strongylida/veterinária , Animais , Argentina/epidemiologia , Feminino , Intestino Delgado/parasitologia , Masculino , Microscopia Eletrônica de Varredura/veterinária , Molineoidae/anatomia & histologia , Molineoidae/ultraestrutura , Prevalência , Infecções por Strongylida/epidemiologia , Infecções por Strongylida/parasitologia
13.
J Helminthol ; 86(4): 395-400, 2012 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22008646

RESUMO

Studies focusing on communities of helminths from Brazilian lizards are increasing, but there are many blanks in the knowledge of parasitic fauna of wild fauna. This lack of knowledge hampers understanding of ecological and parasitological aspects of involved species. Moreover, the majority of research has focused on parasitic fauna of lizards from families Tropiduridae and Scincidae. Only a few studies have looked at lizards from the family Leiosauridae, including some species of Enyalius. This study presents data on the gastrointestinal parasite fauna of Enyalius perditus and their relationships with ecological aspects of hosts in a disturbed Atlantic rainforest area in the state of Minas Gerais, south-eastern Brazil. Two nematode species, Oswaldocruzia burseyi [(Molineidae) and Strongyluris oscari (Heterakidae) were found. Nematode species showed an aggregated distribution in this host population, with O. burseyi being more aggregated than S. oscari. The present study extends the range of occurrence of O. burseyi to the Brazilian continental area.


Assuntos
Ascaridídios/isolamento & purificação , Enteropatias/veterinária , Molineoidae/isolamento & purificação , Infecções por Nematoides/veterinária , Ortópteros/parasitologia , Animais , Ascaridídios/classificação , Brasil , Feminino , Helmintíase/parasitologia , Enteropatias/parasitologia , Enteropatias Parasitárias , Masculino , Molineoidae/classificação , Infecções por Nematoides/parasitologia
14.
J Parasitol ; 97(2): 286-92, 2011 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-21506786

RESUMO

Oswaldocruzia cartagoensis n. sp. (Strongylida: Molineidae) from the intestines of Bolitoglossa subpalmata (Caudata: Plethodontidae) is described and illustrated. Oswaldocruzia cartagoensis n. sp. represents the 86 th species assigned to the genus and the 39th species from the Neotropical region. It is most similar to the Neotropical species of the genus that possess type I bursa, i.e., Oswaldocruzia bonsi , Oswaldocruzia brasiliensis , Oswaldocruzia lopesi , Oswaldocruzia neghmei , and Oswaldocruzia vitti . Of these, O. bonsi, O. brasiliensis, and O. neghmei lack cervical alae, rib 4 in individuals of O. vitti reaches the edge of the bursal membrane, species of O. lopesi and O. cartagoensis can be separated on the basis of spicule structure, the blade in O. lopesi is bifurcate, and that of O. cartagoensis terminates in 6-8 fine points. In addition to the new species of Oswaldocruzia, Cosmocera parva, Cosmocera podicipinus, and acanthocephalan cystacanths were also found.


Assuntos
Enteropatias Parasitárias/veterinária , Molineoidae/classificação , Infecções por Strongylida/veterinária , Urodelos/parasitologia , Animais , Costa Rica , Feminino , Enteropatias Parasitárias/parasitologia , Intestinos/parasitologia , Masculino , Molineoidae/anatomia & histologia , Estômago/parasitologia , Infecções por Strongylida/parasitologia
15.
Rev. peru. biol. (Impr.) ; 15(2): 23-26, feb. 2009. ilus
Artigo em Espanhol | LIPECS | ID: biblio-1111233

RESUMO

En el presente trabajo, se describe a Tricholeiperia peruensis n. sp. (Nematoda, Molineidae) en base a 25 especímenes colectados del intestino de 5 murciélagos de la especie Lophostoma silvicolum occidentalis de la localidad de Angostura, distrito Pampas de Hospital, departamento de Tumbes, Perú. La nueva especie se caracteriza por la morfología de la vesícula cefálica en forma de capuchón con escotaduras, por el tamaño y forma de las espículas cuyo extremo distal de la rama externa se divide en dos, de las cuales la rama interna sufre una nueva división; por la disposición de las costillas de la bolsa copulatríz donde, entre otros detalles, las antero y postero-ventrales están separadas y las externo-dorsales nacen cerca de la parte media del tronco dorsal y son gruesas.


In the present work, Tricholeiperia peruensis. n sp. (Nematoda, Molineidae) is described on the basis of 25 collected specimens from 5 bat intestines of the Lophostoma silvicolum occidentalis species from Angostura, district of Pampas de Hospital, department of Tumbes, Peru. The new species is characterized by the morphology of the cephalic vesicle in the form of hood with recesses, for the size and form of spikes whose distal end of the external branch is divided in 2 from which the internal branch undergoes a new division; by the disposition of the ribs of the copulatory apparatus where, among others details, the pre- and post ventral ribs are separated and the external-dorsal ribs begin near the half of the dorsal trunk and are heavy.


Assuntos
Masculino , Feminino , Humanos , Molineoidae/anatomia & histologia , Nematoides/anatomia & histologia , Quirópteros
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