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1.
Parasitology ; 150(3): 286-296, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36647762

RESUMO

Cosmocercoides Wilkie, 1930 are gastrointestinal parasites commonly found in amphibians and reptiles, with 4 species reported from the Neotropical region. In the present study, a new species of Cosmocercoides, namely Cosmocercoides amapari n. sp. is described using integrated approaches such as light and scanning microscopy, and DNA sequencing of the mitochondrial cytochrome c oxidase subunit 1 gene. The specimens were collected from the large intestine of 3 species of hylid frogs in Amapá, Brazil. The new species can be distinguished from its congeners by morphological traits, including the pattern of caudal papillae, absence of the gubernaculum, 2 poorly sclerotized spicules, presence of lateral alae and somatic papillae along the body. In addition, our molecular analyses and phylogenetic reconstructions strongly support the status of the new taxon, which clustered poorly with a large clade of Cosmocerca spp. Cosmocercoides amapari n. sp. is the 29th species of the genus, the 5th from the Neotropical region, the third reported in Brazil, the second described from the Amazon region and the first belonging to the Neotropical region with molecular data.


Assuntos
Ascaridídios , Nematoides , Parasitos , Animais , Brasil , Filogenia , Anuros/parasitologia , Ascaridídios/genética , Ascaridídios/anatomia & histologia
2.
Parasitol Res ; 121(1): 155-166, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34993630

RESUMO

Rhabdias Stiles and Hassal, 1905 comprises approximately 90 species of parasitic lung nematodes of amphibians and reptiles that have a wide distribution, with 21 species occurring in the Neotropics. In the present study, we describe Rhabdias waiapi n. sp. found parasitizing the lungs of the anuran species Pristimantis chiastonotus from the Amazon Biome in the Amapá State, Northern Brazil. The new species is characterized by having an elongated body, expansions of the cuticular inflation in the anterior end that become more discrete along the body, an anterior end with a slight constriction at the level of the esophageal apex with four rounded subapical elevations of the body wall, six lips, four near the edge of the oral opening and two more distant lateral ones, and a gradually tapering elongated tail. In addition, molecular analyses and phylogenetic reconstructions were made, with sequences from the coding region of the mitochondrial cytochrome c oxidase subunit I gene. Those results strongly support the status of the new taxon, which formed a poorly supported clade with Rhabdias sp. 5 from Anolis brasiliensis from Northeast Brazil. Rhabdias waiapi n. sp. is the 19th species of the genus described in the Neotropics for amphibians, the 10th in Brazil, the second described from hosts of the family Strabomantidae from the Neotropical region, and the first amphibian nematode species described in the Amapá State.


Assuntos
Nematoides , Parasitos , Animais , Anuros , Brasil , Pulmão , Filogenia
3.
Syst Parasitol ; 99(6): 761-769, 2022 12.
Artigo em Inglês | MEDLINE | ID: mdl-36131122

RESUMO

Nematodes collected from the stomach and large intestine of Rhinoclemmys punctularia (Daudin) from the eastern Amazon, Brazil, are assigned to a new genus, Vogtnema n. gen., allocated in the family Atractidae (Cosmocerdoidea). Vogtnema n. gen. differs from all other genera of Atractidae based on the combination of the following morphological characters: four lips V-shaped (two subdorsal and two subventral) without sclerotized structures associated, absence of sclerotized formations and/or pieces surrounding the oral opening, oral aperture surrounded by flange internal membranous structures; in males the larger spicule is alate. The type species Vogtnema asymmetrica n. gen., n. sp. has the five precloacal pairs of papillae situated on the right side of the body that are more prominent than those on the left side. We also provide an identification key to the genera of the family Atractidae.


Assuntos
Ascaridídios , Nematoides , Parasitos , Tartarugas , Animais , Brasil , Masculino , Especificidade da Espécie , Tartarugas/parasitologia
4.
Parasitol Res ; 120(6): 2003-2016, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33860845

RESUMO

Anenterotrema is a small genus of dicrocoeliids (Digenea: Dicrocoeliidae) containing 6 species found in Neotropical bats. Members of this genus are characterized by the lack of digestive system organs and, unlike the majority of dicrocoeliids, parasitize the intestine of their definitive hosts. In this study, we have morphologically examined newly collected specimens belonging to four species of Anenterotrema from Brazil, Ecuador, and Panama. Based on the data in original descriptions and our analysis of quality new specimens, we resurrected Anenterotrema freitasi, previously synonymized with A. eduardocaballeroi. We also described a new species of Anenterotrema from Molossus molossus in the Brazilian Amazon. The new species differs from congeners in several morphological features, most prominently in the size and structure of its highly muscular, protuberant ventral sucker. It is also characterized by the lack of the semi-circular thickening of the tegument around the oral sucker typical for some members of the genus. We used partial DNA sequences of the large ribosomal subunit gene (28S) and mitochondrial cytochrome c oxidase subunit 1 gene (cox1) to test the monophyly of Anenterotrema, and study the interrelationships and determine the inter- and intraspecific variation of three Anenterotrema spp. collected from different bat species in Brazil, Ecuador and Panama.


Assuntos
Quirópteros/parasitologia , Dicrocoeliidae/classificação , Infecções por Trematódeos/veterinária , Animais , Brasil/epidemiologia , Dicrocoeliidae/anatomia & histologia , Dicrocoeliidae/genética , Genes Mitocondriais , Filogenia , Especificidade da Espécie , Infecções por Trematódeos/epidemiologia , Infecções por Trematódeos/parasitologia
5.
Syst Parasitol ; 96(2): 257-264, 2019 03.
Artigo em Inglês | MEDLINE | ID: mdl-30747402

RESUMO

Although little studied, infections with nematodes of the Onchocercidae Leiper, 1911, predominated by the genera Dipetalonema Diesing, 1861 and Mansonella Faust, 1929, are frequent in wild primates and human populations in the Neotropical forest areas. This study reports natural infections with Dipetalonema freitasi Bain, Diagne & Muller, 1987 and D. gracile (Rudolphi, 1809) in two free-living species of pitheciid primates, extending the known geographical distribution of these species to the forest of the Peruvian Amazon. Adult worms were recovered from the thoracic and abdominal cavities of two species of monkeys, Pithecia monachus monachus (É. Geoffroy Saint-Hilaire) and Cacajao calvus ucayalii (Thomas) (Primates: Pitheciidae), collected along the Yavari-Mirin River basin and analysed via light and scanning electron microscopy. Both host species represent new host records for D. freitasi and D. gracile. Morphometric data are also presented for the sampled filarial worms in addition to morphological details obtained through light and electron microscopy examination of D. freitasi specimens.


Assuntos
Nematoides/classificação , Nematoides/fisiologia , Pitheciidae/parasitologia , Cavidade Abdominal/parasitologia , Animais , Microscopia Eletrônica de Varredura , Nematoides/ultraestrutura , Especificidade da Espécie , Cavidade Torácica/parasitologia
6.
Syst Parasitol ; 96(7): 617-624, 2019 09.
Artigo em Inglês | MEDLINE | ID: mdl-31332673

RESUMO

Metadelphis tkachi n. sp. is described based on material from the gall-bladder of Molossus molossus (Pallas) (Chiroptera: Molossidae) in the Brazilian eastern Amazon. The main differentiating characters of the new species include lobed, tandem testes and elongated clusters of vitelline follicles commencing at the level of the seminal receptacle. The new species can be distinguished from Metadelphis lenti (Santos & Gibson, 1998) and Metadelphis apharyngotrema (Marshall & Miller, 1979) by the shape and position of the testes; from Metadelphis evandroi Travassos, 1944 by having tandem, lobed testes and shorter clusters of vitelline follicles; from Metadelphis compactus Travassos, 1955 by having tandem testes and more elongated clusters of vitelline follicles, and from Metadelphis alverangai Travassos, 1955 by having smaller testes and body, and vitellarium with large follicles. New morphological data are reported for M. lenti based on light and scanning electron microscopy; intraspecific variation was observed.


Assuntos
Quirópteros/parasitologia , Dicrocoeliidae/classificação , Dicrocoeliidae/fisiologia , Vesícula Biliar/parasitologia , Animais , Brasil , Dicrocoeliidae/anatomia & histologia , Dicrocoeliidae/ultraestrutura , Especificidade da Espécie
7.
Syst Parasitol ; 95(2-3): 293-300, 2018 03.
Artigo em Inglês | MEDLINE | ID: mdl-29230677

RESUMO

Neocosmocercella fisherae n. sp. is the first nematode species found parasitising Phyllomedusa bicolor from the Brazilian Amazon Region. The new species has a triangular oral opening, with bi-lobed lips, and is distinguished from N. bakeri (triangular oral opening with simple lips), and from N. paraguayensis (hexagonal oral opening with bi-lobed lips). Additionally, the new species has ciliated cephalic papillae, which are absent in the other species of the genus. The reduced uterine sac and the presence of a single egg in the uterus in females are the main morphological characters that differentiate the new species from its congeners N. bakeri (8-10 eggs) and N. paraguayensis (10 eggs, based on the allotype). Additionally, the new species differs from the other two species of the genus by morphometric characters such as the size of spicules and gubernaculum in males and the vagina in females. Until now, phyllomedusid anurans are the only known hosts for the nematodes of this genus. The present work describes the third species of the genus and the first species of nematode parasitising P. bicolor.


Assuntos
Ascaridídios/anatomia & histologia , Ascaridídios/classificação , Ranidae/parasitologia , Animais , Brasil , Feminino , Intestino Grosso/parasitologia , Masculino , Especificidade da Espécie
8.
Syst Parasitol ; 94(4): 505-510, 2017 05.
Artigo em Inglês | MEDLINE | ID: mdl-28343324

RESUMO

Neocosmocercella bakeri n. sp. is described from the large intestine of Phyllomedusa vaillantii Boulenger collected in the Caxiuanã National Forest in the Eastern Brazilian Amazon. The new species is easily distinguished from the type-species of the genus, Neocosmocercella paraguayensis Baker & Vaucher, 1983 in possessing a triangular mouth opening with three simple lips (vs three bi-lobed lips and hexagonal mouth opening) and somatic papillae, which are absent in N. paraguayensis. The males of the new species are distinguished by the distribution of the sessile cloacal papillae and the dimensions of the gubernaculum, whereas the females are distinguished by their smaller size and opisthodelphic uterus. This study expands the diagnostic characters of Neocosmocercella Baker & Vaucher, 1983, reports the first species parasitising anurans of the Brazilian Amazon, a new host record for the genus, and the description of the second species of the genus.


Assuntos
Anuros/parasitologia , Ascaridídios/classificação , Animais , Ascaridídios/anatomia & histologia , Brasil , Feminino , Florestas , Masculino , Especificidade da Espécie
9.
Syst Parasitol ; 93(1): 37-45, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26739285

RESUMO

A new lung-dwelling nematode species is described from the common lancehead Bothrops atrox (Linnaeus) in the Brazilian Amazon Region. The species is assigned to the genus Serpentirhabdias Tkach, Kuzmin & Snyder, 2014 based on the presence of six lips arranged in two lateral groups, the absence of prominent cuticular inflations, and lung parasitism in snakes. Serpentirhabdias atroxi n. sp. differs from other species of the genus mainly by details of the morphology of the anterior end: cuticularised ring surrounding the anterior part of the buccal cavity and six minute onchia present in the oesophastome. Serpentirhabdias atroxi n. sp. is the seventh species of the genus known from the Neotropical Realm and the second species described from viperid snakes.


Assuntos
Bothrops/parasitologia , Rhabditoidea/anatomia & histologia , Rhabditoidea/classificação , Animais , Brasil , Pulmão/parasitologia , Infecções por Rhabditida/parasitologia , Especificidade da Espécie
10.
Syst Parasitol ; 92(3): 251-9, 2015 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-26446547

RESUMO

Kentropyxia hylae n. sp. is described based on material from small intestine of Osteocephalus taurinus Steindachner from Caxiuanã National Forest, municipality of Melgaço, state of Pará, Brazil. The new species is easily distinguished from the type-species and only species of the genus, Kentropyxia sauria Baker, 1982, by its smaller dimensions, the presence of cervical alae, spicules divided into three parts: a robust, single pointed outer processes ending with small finger-like projections and latero-dorsal and latero-ventral processes branching at final portion of spicule into six main branches, each ending with 14 projections in the latero-dorsal process and 15 projections in the latero-ventral process and by the presence of a middle groove in bursa ray 4. This is the second species parasitic in hylids from the Brazilian Amazon and a new parasite for O. taurinus.


Assuntos
Anuros/parasitologia , Intestino Delgado/parasitologia , Nematoides/anatomia & histologia , Nematoides/classificação , Animais , Brasil , Especificidade da Espécie
11.
Syst Parasitol ; 89(2): 101-6, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-25204597

RESUMO

Serpentirhabdias atracti n. sp. is described based on specimens discovered in the lung of Atractus major Boulenger from Caxiuanã National Forest, Pará, Brazil. The new species is assigned to Serpentirhabdias Tkach, Kuzmin & Snyder, 2014 based on morphological characters (comparatively thin body cuticle without prominent inflations, arrangement of circumoral papillae in two lateral groups, pre-equatorial position of vulva, eggs in uteri at early cleavage stages), as well as because of its parasitism in snakes. The new species is most similar to S. vellardi (Pereira, 1928) due to the absence of lips and buccal capsule, similar body dimensions, and the specificity to dipsadid snakes in Brazil. The two species differ in the shape of the tail (bulbous dilatation in the posterior part followed by a thread-like tail tip present in S. atracti n. sp.), the width of the oesophagus, and the size of the excretory glands. Serpentirhabdias atracti n. sp. is the sixth species of this genus found in the Neotropical Region.


Assuntos
Nematoides/anatomia & histologia , Nematoides/classificação , Serpentes/parasitologia , Animais , Brasil , Especificidade da Espécie
12.
Int J Parasitol Parasites Wildl ; 24: 100961, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-39070049

RESUMO

Nematodes collected from the stomach of the yellow-spotted turtle Podocnemis unifilis Troschel, 1848 (Testudinidae) in the Brazilian state of Pará are assigned to a new genus, allocated to the family Atractidae (Cosmocerdoidea). Acanthoatractis n. gen. differs from all other genera of Atractidae based on the combination of the following morphological characters: cephalic extremity surrounded by eight bifurcated, wrench-shaped sclerotized structures arranged in a circle; oral opening encircled by two sclerotized pieces with pointed ends and a median portion with a pair of hooks; in males the larger (left) spicule is narrower in the middle third and the gubernaculum is absent. The type species, Acanthoatractis xinguensis n. gen., n. sp., has nine pairs of caudal papillae and a single papilla anterior to the cloacal lip. The new species is the seventh record of an atractid genus parasitizing P. unifilis.

13.
Syst Parasitol ; 86(1): 69-75, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23949651

RESUMO

Nematodes of the genus Rhabdias Stiles & Hassall, 1905 (Rhabditoidea: Rhabdiasidae) have a dioecious free-living stage and a hermaphroditic stage that parasitises the lungs of amphibians and reptiles. Approximately 94 species of Rhabdias have been described. Because the similar morphological characteristics such as the labial structures, the location of the vulva and the shape of the tail of Rhabdias spp. hinder their identification, molecular biology techniques and scanning electron microscopy have been employed to diagnose species of this genus. This study describes Rhabdias breviensis n. sp., parasitic in the lungs of two Neotropical frog species Leptodactylus petersii Steindachner and Leptodactylus macrosternum Miranda-Ribeiro. The description of this species integrates classical taxonomy, scanning electron microscopy and a molecular analysis of the mitochondrial COI gene. The new species differs from all other Rhabdias species parasitic in Neotropical hosts in certain morphometric parameters, the position of the vulva, the host group and the cephalic characters.


Assuntos
Anuros/parasitologia , Infecções por Rhabditida/parasitologia , Rhabditoidea/classificação , Animais , Sequência de Bases , Brasil , DNA de Helmintos/química , DNA de Helmintos/genética , Feminino , Genes Mitocondriais/genética , Pulmão/parasitologia , Microscopia Eletrônica de Varredura/veterinária , Dados de Sequência Molecular , Rhabditoidea/anatomia & histologia , Rhabditoidea/genética , Rhabditoidea/isolamento & purificação , Análise de Sequência de DNA/veterinária
14.
Parasitol Res ; 110(1): 389-94, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21748356

RESUMO

Satanoperca jurupari (Osteichthyes: Cichlidae) is reported for the first time to be parasitized by the nematodes Procamallanus (Spirocamallanus) rarus Travassos, Artigas and Pereira, 1928, Procamallanus (Spirocamallanus) sp., larvae of Raphidascaroides sp. and Anisakidae gen. sp., and by the acanthocephalan Neoechinorhynchus (Neoechinorhynchus) paraguayensis Machado Filho (Rev Bras Biol 19:379-381, 1959).


Assuntos
Ciclídeos/parasitologia , Doenças dos Peixes/parasitologia , Doenças Parasitárias em Animais/parasitologia , Acantocéfalos/isolamento & purificação , Animais , Brasil , Nematoides/isolamento & purificação
15.
Syst Parasitol ; 82(2): 125-9, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22581249

RESUMO

Sciadicleithrum juruparii n. sp. is described from the gills of the Neotropical cichlid fish Satanoperca jurupari (Heckel) caught in the Guamá River, in the delta of the Amazon River, at Belém, Pará State, Brazil. Diagnostic characters of the new species are a basally articulated male copulatory organ with clockwise coils and an accessory piece; a ventral bar with a median process; similar hooklets; vagina in the form of a sclerotised tube; and a sinistral vaginal aperture with a sclerotised papilla lying in a small surface depression. It is the only species of Sciadicleithrum Kritsky, Thatcher & Boeger, 1989 with a medial projection on the ventral bar.


Assuntos
Ciclídeos/parasitologia , Brânquias/parasitologia , Platelmintos/classificação , Platelmintos/isolamento & purificação , Estruturas Animais/anatomia & histologia , Animais , Brasil , Microscopia , Platelmintos/anatomia & histologia , Rios
16.
Parasitol Int ; 89: 102575, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35292369

RESUMO

Ochoterenatrema is a small genus of lecithodendriid digeneans that includes six species parasitic in Neotropical bats in North and South America. Members of this genus are characterized by the presence of a pseudogonotyl formed by thickened tegument on the left side of the ventral sucker. We examined morphology of specimens belonging to five species of Ochoterenatrema from Brazil, Ecuador and the USA and describe two new Ochoterenatrema spp. (Ochoterenatrema sphaerula n. sp. and Ochoterenatrema gracilis n. sp.). These new species are readily differentiated from their congeners by a combination of morphological characters, including the distribution of vitelline follicles and the body shape. We have provided the first DNA sequences for Ochoterenatrema. Newly generated partial nuclear 28S rDNA and mitochondrial cox1 gene sequences were used to differentiate among species and study the phylogenetic affinities of Ochoterenatrema spp., including one of the new species, O. gracilis n. sp., as well as Ochoterenatrema diminutum, Ochoterenatrema fraternum and Ochoterenatrema cf. labda. The phylogeny of the Microphalloidea based on 28S had well-supported topology, particularly at the family level. The Ochoterenatrema clade was strongly supported; however, the internal topology of the clade was weakly supported. Comparison of sequences revealed 0.4-1.3% interspecific divergence in 28S and 9.1-19.7% interspecific divergence in cox1 among Ochoterenatrema spp. We hypothesize that extremely diverse fauna of bats in South and Central America harbors multiple undescribed species of Ochoterenatrema. Several lecithodendriid genera from bats and other hosts are yet to be included in future molecular phylogenetic analyses to test the monophyly of this extremely diverse digenean family and analyze evolutionary affinities of its constituent taxa.


Assuntos
Quirópteros , Trematódeos , Infecções por Trematódeos , Animais , Brasil , Quirópteros/parasitologia , Filogenia , RNA Ribossômico 28S/genética , Infecções por Trematódeos/parasitologia , Infecções por Trematódeos/veterinária
17.
Emerg Infect Dis ; 17(5): 863-6, 2011 May.
Artigo em Inglês | MEDLINE | ID: mdl-21529396

RESUMO

A case of human intraocular dirofilariasis is reported from northern Brazil. The nematode was morphologically and phylogenetically related to Dirofilaria immitis but distinct from reference sequences, including those of D. immitis infesting dogs in the same area. A zoonotic Dirofilaria species infesting wild mammals in Brazil and its implications are discussed.


Assuntos
Dirofilaria/fisiologia , Dirofilariose/parasitologia , Olho/parasitologia , Adolescente , Animais , Brasil , Ciclo-Oxigenase 1/genética , Dirofilaria/classificação , Dirofilaria/genética , Dirofilariose/cirurgia , Olho/patologia , Oftalmopatias/parasitologia , Oftalmopatias/cirurgia , Humanos , Masculino , Dados de Sequência Molecular , Fenótipo , Filogenia
18.
Emerg Infect Dis ; 17(5): 867-9, 2011 May.
Artigo em Inglês | MEDLINE | ID: mdl-21529397

RESUMO

A male nematode was extracted from iris fibers of a man from the Brazilian Amazon region. This nematode belonged to the genus Pelecitus but was distinct from the 16 known species in this genus. Similarities with Pelecitus spp. from neotropical birds suggested an avian origin for this species.


Assuntos
Olho/parasitologia , Filariose/parasitologia , Filarioidea/fisiologia , Adulto , Animais , Brasil , Olho/patologia , Filariose/cirurgia , Humanos , Masculino
19.
Mem Inst Oswaldo Cruz ; 106(5): 553-6, 2011 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-21894375

RESUMO

Raphidascaris (Sprentascaris) lanfrediae sp. nov. is described from the intestine of the freshwater fish Satanoperca jurupari (Heckel) (Cichlidae) from the Guamá River, state of Pará, Brazil. The prevalence in fish (n = 59) was 27% with intensity of one-124 (mean 16) nematodes per fish. The new species is characterized mainly by the markedly larger size of ventricular appendix in relation to the oesophagus, presence of short male caudal alae, 14-16 subventral pairs of preanal papillae and six pairs of postanal papillae.


Assuntos
Anisakis/classificação , Peixes/parasitologia , Animais , Anisakis/isolamento & purificação , Anisakis/ultraestrutura , Brasil , Feminino , Água Doce , Masculino , Microscopia Eletrônica de Varredura
20.
J Parasitol ; 107(5): 703-709, 2021 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-34516638

RESUMO

Allintoshius Chitwood, 1937 is the only genus of the family Ornithostrongylidae (Travassos, 1937) Durette-Desset and Chabaud, 1981 that parasitizes bats. Currently, there are 10 valid species in the genus, of which 3 were described from Brazil. This study describes a new species of Allintoshius and records the first occurrence of a nematode of this genus parasitizing Artibeus lituratus (Olfers). Allintoshius gomesae n. sp. is characterized by having anterior region coiled, cephalic vesicle with cuticular dilation striated transversely, and claviform esophagus. Synlophe in females consists of 16 cuticular ridges at the mid-body. Males have large caudal bursa, and conic and small spicules, and the gubernaculum is absent. Females have uterus didelphic, amphidelphic, tail tip tapered, and ovijector divided into 2 divergent branches, subequal in length. The new species differs from its congeners especially by the shape of the tail tip, vulvar opening, and size of spicules. Allintoshius gomesae is the fourth species of Allintoshius from Brazil and the first report in Ar. lituratus, increasing the number of species recognized of the genus.


Assuntos
Quirópteros/parasitologia , Heligmosomatoidea/classificação , Infecções por Strongylida/veterinária , Animais , Brasil , Quirópteros/classificação , Feminino , Heligmosomatoidea/anatomia & histologia , Heligmosomatoidea/isolamento & purificação , Intestino Delgado/parasitologia , Masculino , Infecções por Strongylida/parasitologia
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