Abstract
Hoplias malabaricus (Characiformes, Erythrinidae), trahira, is a neotropical freshwater fish of economic and public health significance. A total of 45 specimens of H. malabaricus commercialized in the municipality of Magé, state of Rio de Janeiro, Brazil, were acquired between April 2016 and April 2018 to investigate the presence of nematode larvae. Twenty of the fish were found parasitized by 347 fourth-stage nematode larvae identified taxonomically as Eustrongylides sp. using morphological, morphometric and molecular data. The parasitic indices were: prevalence 44.44%, mean intensity 17.35, mean abundance 7.71, and range of infection 2-40. Infection sites were musculature, mesentery, abdominal cavity, and serosa of intestine, stomach and liver. This is the first report of Eustrongylides sp. larvae parasitizing H. malabaricus in the state of Rio de Janeiro.
Highlights
Hoplias malabaricus (Characiformes, Erythrinidae), traíra, é um peixe neotropical de água doce que tem significante impacto na economia e saúde pública
There are no records of this parasitism of humans in Brazil, the possibility cannot be ruled out because these nematodes have been recorded in several species of freshwater fish in many states of the country (BARROS et al, 2006; BENIGNO et al, 2012; EIRAS et al, 2010; RODRIGUES et al, 2015; TAVARES et al, 2017)
This, reinforces Measures (1988b), Coyner et al (2002) and Moravec (1998), who reported that the fourth-stage larvae of Eustrongylides spp. could not be identified to the species level by morphological and morphometric characteristics alone, unless there was an experimental infection in a definitive host to obtain an adult nematode
Summary
Hoplias malabaricus (Characiformes, Erythrinidae), traíra, é um peixe neotropical de água doce que tem significante impacto na economia e saúde pública. The aim of the present study was to assess the presence of nematode larvae parasitizing H. malabaricus in the municipality of Magé, state of Rio de Janeiro, Brazil. The main morphological characters observed in 10 fourth-stage larvae from H. malabaricus: Large nematodes.
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Schedule a callMore From: Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria
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