Prevalence, intensity and ecological aspects of Contracaecum sp. (Nematode: anisakidae) in freshwater fish of Argentina

The genus Contracaecum belongs to the Anisakidae family which includes parasites of considerable economic and medical importance. Larvae of Contracaecum are associated with a wide variety of freshwater and marine fish. Although there are a significant number of reports that indicate the presence of...

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Published inNeotropical helminthology Vol. 8; no. 1; pp. 111 - 122
Main Authors Biolé, Fernanda G, Guagliardo, Silvia E, Mancini, Miguel A, Morra, Gerardo, Tanzola, Ruben Daniel, Salinas, Víctor H
Format Journal Article
LanguageEnglish
Published Asociación Peruana de Helmintología e Invertebrados afines (APHIA) 2014
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Summary:The genus Contracaecum belongs to the Anisakidae family which includes parasites of considerable economic and medical importance. Larvae of Contracaecum are associated with a wide variety of freshwater and marine fish. Although there are a significant number of reports that indicate the presence of anisakid in fish from different parts of the world, there are few studies in the central region of Argentina, despite the prevalence observed in recent years. In the present study we provide new records and analyze ecological aspects of anisakid from fish of different aquatic systems with different hydrological characteristics from central Argentina. A total of 1402 individuals belonging to nine species, six families and four orders of fish were examined. The helminths were found in Astyanax eigenmanniorum (Characidae), Oligosarcus jenynsii (Characidae), Odontesthes bonariensis (Atherinopsidae), Hoplias malabaricus (Erythrinidae), Pimelodus albicans (Pimelodidae) and Rhamdia quelen (Pimelodidae). The last three host species showed up to 100% prevalence and maximum intensities of 162, 180 and 48 larvae/fish, respectively. All parasites found coincide with larvae of Contracaecum sp. type 2. El género Contracaecum pertenece a la familia Anisakidae, la cual incluye parásitos de considerable importancia económica y médica. Las larvas de Contracaecum están asociadas con una amplia variedad de peces marinos y de agua dulce. Si bien, hay una gran cantidad de reportes que indican la presencia de anisákidos en peces de diferentes partes del mundo, los estudios en la región central de Argentina son escasos, pese a las prevalencias observadas en años recientes. Este estudio proporciona nuevos registros y analiza aspectos ecológicos de larvas de Contracaecum presentes en peces de ambientes acuáticos con diferentes características hidrológicas ubicados en el centro de Argentina. Se examinó un total de 1402 peces pertenecientes a nueve especies, seis familias y cuatro órdenes. Los helmintos fueron hallados en Astyanax eigenmanniorum (Characidae), Oligosarcus jenynsii (Characidae), Odontesthes bonariensis (Atherinopsidae), Hoplias malabaricus (Erythrinidae), Pimelodus albicans (Pimelodidae) y Rhamdia quelen (Pimelodidae). Estas últimas tres especies hospedadoras exhibieron prevalencias de hasta 100% e intensidades máximas de 162, 180 y 48 larvas/pez, respectivamente. La totalidad de los parásitos hallados se corresponden con larvas de tercer estadio de Contracaecum sp., compatibles con el tipo 2.
ISSN:1995-1043
1995-1043