Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 4 de 4
Filtrar
Mais filtros











Base de dados
Intervalo de ano de publicação
1.
J Parasitol ; 106(5): 689-698, 2020 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-33113554

RESUMO

Information regarding trichodinid ectoparasites on marine fishes of North America is relatively scarce. In this study, 5 ciliate species from the family Trichodinidae were found associated with 8 fish hosts from the rocky intertidal zone of the western coast of the Baja California Peninsula (BCP), Mexico. All of the host-parasite relationships recorded here are new. Furthermore, 3 of the trichodinid species found are recorded for the first time for Mexico. Trichodinids taxa do not show a noticeable distributional gradient along the BCP, which suggests a wide-continuous distribution of the species throughout the study area.


Assuntos
Infecções por Cilióforos/veterinária , Cilióforos/classificação , Doenças dos Peixes/parasitologia , Animais , Cilióforos/ultraestrutura , Infecções por Cilióforos/parasitologia , Peixes , Brânquias/parasitologia , Interações Hospedeiro-Parasita , México , Oceano Pacífico
2.
Acta Trop ; 166: 328-335, 2017 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-27916503

RESUMO

A new isopod was found parasitizing Chaetostoma breve and Chaetostoma microps from the Puyo and Bobonaza rivers. The parasite found belongs to the Cymothoidae family and could be located within the genus Riggia instead of Artystone by the presence of abdominal plates fused with the telson. The specimens found represent a new species, Riggia puyensis n. sp., and could be distinguished from Riggia cryptocularis by the presence of developed eyes. The main difference of the new specie from Riggia nana and Riggia brasiliensis is the size, bigger compared with the first and smaller compared with the last species. Riggia acuticaudata have the maxilliped with simple setae, the palp without spination, and maxillule with five spines (two terminal and three subterminal) instead in R. puyensis n. sp. the maxilliped have plumose setae, the palp have spination (with one apical spine, two setae on middle article and one in the basal article) and the maxillule have five spines: two terminal, two subterminal and other spine lower to the others. Riggia paranaensis have similar size, same number of segments in the antena, and similar maxilla to R. puyensis n. sp., but the antennule in the new specie have seven segments instead 6 in R. paranaensis, the antennule and antenna present spines not mentioned in R. paranaensis. Besides, the relative position of the mandible in R. puyensis n. sp. is different compared with R. paranaensis, the maxillule have the same number of spines but with different disposition, and the maxilliped have simple setae in R. paranaensis but those are plumose in the new specie.


Assuntos
Peixes-Gato/parasitologia , Isópodes/classificação , Rios/parasitologia , Animais , Equador , Especificidade da Espécie
3.
Acta Trop ; 167: 50-58, 2017 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-28012904

RESUMO

A new isopod was found parasitizing Chaetostoma breve and Chaetostoma microps from the Puyo and Bobonaza rivers. The parasite found belongs to the Cymothoidae family and could be located within the genus Riggia instead of Artystone by the presence of abdominal plates fused with the telson. The specimens found represent a new species, Riggia puyensis n. sp., and could be distinguished from Riggia cryptocularis by the presence of developed eyes. The main difference of the new specie from Riggia nana and Riggia brasiliensis is the size, bigger compared with the first and smaller compared with the last species. Riggia acuticaudata have the maxilliped with simple setae, the palp without spination, and maxillule with five spines (two terminal and three subterminal) instead in R. puyensis n. sp. the maxilliped have plumose setae, the palp have spination (with one apical spine, two setae on middle article and one in the basal article) and the maxillule have five spines: two terminal, two subterminal and other spine lower to the others. Riggia paranaensis have similar size, same number of segments in the antena, and similar maxilla to R. puyensis n. sp., but the antennule in the new specie have seven segments instead 6 in R. paranaensis, the antennule and antenna present spines not mentioned in R. paranaensis. Besides, the relative position of the mandible in R. puyensis n. sp. is different compared with R. paranaensis, the maxillule have the same number of spines but with different disposition, and the maxilliped have simple setae in R. paranaensis but those are plumose in the new specie.


Assuntos
Peixes-Gato/parasitologia , Isópodes/classificação , Rios/parasitologia , Animais , Tamanho Corporal , Peixes-Gato/anatomia & histologia , Equador , Isópodes/anatomia & histologia , Tamanho do Órgão
4.
Vet Parasitol ; 190(3-4): 599-603, 2012 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-22832071

RESUMO

This is the first report of Ascocotyle (Phagicola) longa Ransom, 1920 (Digenea: Heterophyidae) in Argentina confirmed by morphological and molecular studies. The metacercaria was found encysted in myotomal musculature, heart and mesentery of the mullet Mugil liza (Pisces: Mugilidae) from Samborombon bay. We provide a morphological description of the metacercaria which we identified using species-specific primers for A. (Phagicola) longa and nucleotid sequence. This worldwide parasite has been reported as one of the causative agents of heterophyiosis, an emerging fish-borne disease of humans, contracted by the consumption of raw mullet. The discovery of A. (Phagicola) longa in Argentina represents a warning of the potentially great impact of this parasite on public health.


Assuntos
Doenças dos Peixes/parasitologia , Smegmamorpha , Trematódeos/classificação , Infecções por Trematódeos/veterinária , Animais , Argentina/epidemiologia , Doenças dos Peixes/epidemiologia , Trematódeos/anatomia & histologia , Infecções por Trematódeos/epidemiologia , Infecções por Trematódeos/parasitologia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA