Precocity of Gnathostoma turgidum in naturally infected four-eyed opossum Philander opossum pallidus from Temascal, Oaxaca, Mexico

Almeyda-Artigas, Roberto Javier; Mosqueda-Cabrera, Miguel Ángel; Sánchez-Núñez, Edmundo

doi:10.1007/s00436-009-1682-8

Cited by 6 publications

(1 citation statement)

References 12 publications

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“…However, preliminary studies of the helminths of the animals mentioned above were negative for this parasite. Almeyda-Artigas et al (2010) reported finding individuals of Philander opossum Linnaeus 1758, a species found on the island, infected with G. turgidum in Mexico, but no studies of this possible host have been made.…”

Section: Poeciliopsis Gracilismentioning

confidence: 99%

Gnathostomatidae nematode parasite of Colomesus psittacus (Osteichthyes, Tetraodontiformes) in the Ilha de Marajó, Brazilian Amazon

Pinheiro

Santana

Melo

et al. 2017

Rev. Bras. Parasitol. Vet.

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The genus Gnathostoma comprises 17 species, whose adult specimens are found in the stomach serosa of animals that consume raw fish; some species of the genus are zoonotic agents. The present study describes the presence of a nematode (Gnathostomatidae) parasitizing the digestive tract of Colomesus psittacus in the Ilha de Marajó in the eastern Brazilian Amazon. Thirty specimens of C. psittacus were collected in the municipality of Soure, Ilha de Marajó, state of Pará, Brazil, transported to the laboratory, necropsied and the helminths were collected and fixed. Of the 30 fish that were studied, 16.67% were parasitized with nematodes. The nematode larvae found encysted in the intestinal serosa have anterior region with two lips, each with a pair of papillae; a cephalic bulb armed with six rows of discontinuous spines; four cervical sacs; a claviform esophagus; cuticular striations along the body; a simple excretory pore; and a short tail ending in a mucron. These morphological structures are diagnostic characters of the genus Gnathostoma, whose adults parasitize the stomach of carnivorous mammals and, rarely, the stomach of fish. However, fish, amphibians, reptiles, and birds are intermediate hosts of the third-stage larvae (L3), and humans may act as accidental hosts.Keywords: Gnathostoma, parasitism, estuary, puffer fish. ResumoO gênero Gnasthostoma é composto por 17 espécies, sendo reportado o caráter zoonótico para algumas. Este trabalho descreve a presença de nematoide da família Gnathostomatidae, parasito do trato digestório de Colomesus psittacus, na Ilha de Marajó, Amazônia oriental brasileira, transportados para o laboratório, necropsiados os helmintos colhidos e fixados. Dos 30 animais analisadas 16,67% estavam parasitados por nematoides. As larvas de nematoides foram encontradas encistadas na serosa intestinal, apresentam na região anterior dois lábios com duas papilas cada, bulbo cefálico armado de 6 fileiras de espinhos descontínuos, quatro sacos cervicais, esôfago claviforme, estrias cuticulares ao longo do corpo, abertura anal simples, cauda curta, terminando em um mucron. A junção de todos esses caracteres morfológicos, são características diagnósticas para gênero Gnathostoma. Os indivíduos adultos são parasitos de estômago de mamíferos carnívoros e raramente de peixes, porém peixes, anfíbios, répteis e aves atuam como hospedeiros intermediários das larvas (L3) e o homem pode atuar como hospedeiro acidental.Palavras-chave: Gnasthostoma, parasitismo, estuário, baiacu.

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Section: Poeciliopsis Gracilismentioning

confidence: 99%

Gnathostomatidae nematode parasite of Colomesus psittacus (Osteichthyes, Tetraodontiformes) in the Ilha de Marajó, Brazilian Amazon

Pinheiro

Santana

Melo

et al. 2017

Rev. Bras. Parasitol. Vet.

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Intrahepatic growth and maturation of Gnathostoma turgidum in the natural definitive opossum host, Didelphis virginiana

Díaz‐Camacho

Delgado‐Vargas

Willms³

et al. 2010

Parasitology International

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Molecular Characterization of Host-Specific Raphidascaridoid Worms from the Gangetic Garfish (Teleostomi: Belonidae) in India

Malhotra¹

2017

IJMBOA

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The 18S rDNA gene analysis with Internal Transcribed Spacers 1 and 2, and Mit. coi gene analyses of 12 sequences from the host-specific nematodes parasitizing liver of garfish, Xenentodon cancila (Belonidae) revealed their monophyletic characterization. The purification of PCR products was done using Centri-Sep spin columns (Princeton Separations, Adelphia, New Jersey, USA) and sequenced by ABI 3730 auto sequencer Applied Biosystems. Their genetic heterogeneity on the basis of comparable sequences from gnathostomatoid genus, Gnathostoma, 16 anisakid and ascaridoid genera assisted these to be ascribed to a newer genus, Indospinezia multispinatum gen. et sp. n. under a newly erected tribe Indospineziinea tribe n. under family Goeziinae, as the morphological differentiation distinctly segregated their taxonomic identity. The fish host, X. Cancila acted as the common intermediate as well as definitive host in the Gangetic riverine ecosystem at Allahabad, India. Though the newer worms had typical gnathostomatoid (fish spirurins) characters, yet the single-toothed unidentate spines, cervical sacs, and the number of caudal papillae, that comprised pre-cloacal foliate as well as 'sunflower' papillae, differentiated them from the spirurins. The post-labial double-ridged cuticular collar at the base of head, and an altogether different sclerotized oral lid-plate distinguished these worms from genus Goezia as well as spirurins. Therefore, the new genus, has been accommodated under a newly raised tribe, Indospineziinea tribe n.

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Precocity of Gnathostoma turgidum in naturally infected four-eyed opossum Philander opossum pallidus from Temascal, Oaxaca, Mexico

Cited by 6 publications

References 12 publications

Gnathostomatidae nematode parasite of Colomesus psittacus (Osteichthyes, Tetraodontiformes) in the Ilha de Marajó, Brazilian Amazon

Gnathostomatidae nematode parasite of Colomesus psittacus (Osteichthyes, Tetraodontiformes) in the Ilha de Marajó, Brazilian Amazon

Intrahepatic growth and maturation of Gnathostoma turgidum in the natural definitive opossum host, Didelphis virginiana

Molecular Characterization of Host-Specific Raphidascaridoid Worms from the Gangetic Garfish (Teleostomi: Belonidae) in India

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