Trypanorhynch cestodes parasitizing Mugil liza (Mugiliformes: Mugilidae) commercialized in the state of Rio de Janeiro, Brazil

Abstract

The aim of the present study was to identify, through morphological and morphometric analyses, the species of trypanorhynch cestodes found as plerocerci in the intestinal serosa of Mugil liza and to determine their parasitic indices. One hundred and fifty specimens of this mullet collected off the coast of the state of Rio de Janeiro were necropsied and the trypanorhynch cestodes found were fixed and preserved as whole mounts for morphological analysis. The plerocerci were identified as Callitetrarhynchus gracilis and Pterobothrium crassicole, both with a prevalence of 0.67%, an intensity of 1 and abundance of 0.0067, in single infections. This is the first record of a trypanorhynch cestode parasitizing M. liza in Brazil. Although the parasitic indexes were low, from a hygienic-sanitary perspective the plerocerci of these species are visible to the naked eye, and thus can disgust consumers and make marketing the fish unfeasible.

Cestode and nematode larvae of hygienic-sanitary importance parasitizing Percophis brasiliensis (Actinopterygii) collected from fish markets of the municipality of Niterói, RJ, Brazil

“…Adults inhabit the gastrointestinal tract of elasmobranchs while larvae occur in the celomic cavity, visceral serosa and musculature of cephalopod, crustacean and teleost intermediate hosts (Palm, 2004). Parasitism of Brazilian fish by trypanorhynch larvae has been reported in papers on taxonomy, parasite ecology and hygienic-sanitary conditions (São Clemente et al, 1997;Felizardo et al, 2010, Oliveira et al, 2019. Trypanorhynch larvae acquire significance due to their repugnant aspect, especially when present as massive infections in musculature and organs, which can make commercialization infeasible due to sanitary inspection and/or consumer rejection, thus resulting in economic losses (Oliveira et al, 2019).…”

“…Parasitism of Brazilian fish by trypanorhynch larvae has been reported in papers on taxonomy, parasite ecology and hygienic-sanitary conditions (São Clemente et al, 1997;Felizardo et al, 2010, Oliveira et al, 2019. Trypanorhynch larvae acquire significance due to their repugnant aspect, especially when present as massive infections in musculature and organs, which can make commercialization infeasible due to sanitary inspection and/or consumer rejection, thus resulting in economic losses (Oliveira et al, 2019). The allergenic potential of some of these cestode species has been studied in tests carried out with murine models (Mattos et al, 2015).…”

First molecular detection of the parasites Molicola uncinatus and Hepatoxylon trichiuri (Cestoda: Trypanorhyncha) infecting the silver scabbardfish Lepidopus caudatus from the Central Mediterranean Sea: Implications for the seafood quality and safety

“…The larval forms of Trypanorhyncha are generally found encysted in visceral organs and/or musculature of marine teleosts. Their occurrence in the muscles alters the fish flesh quality, reducing the marketability of commercially important fish species (Dias, Sao Clemente, Pinto, & Knoff, 2011;da Fonseca, de Sao Clemente, Felizardo, Gomes, & Knoff, 2012;Deardorff, Raybourne, & Mattis, 1984;Giarratana et al, 2014;Samn, Metwally, Zeina, & Khalaf Allah, 2014;Abdelsalam et al, 2016;Santoro et al, 2018;Oliveira, Kuraiem, Fonseca, Gomes, & Knoff, 2019;Guardone et al, 2020). Heavily infected fish fillets result unappealing to consumers; thus, the presence of these parasites causes economic loss to the fishing industry (Abdelsalam et al, 2016;Deardorff et al, 1984;Giarratana et al, 2014;Samn et al, 2014;Santoro et al, 2018).…”

Cestode and nematode larvae of hygienic-sanitary importance parasitizing Balistes capriscus Gmelin, 1789, collected from fish markets of the state of Rio de Janeiro, Brazil

“…Adults inhabit the gastrointestinal tract of elasmobranchs while larvae occur in the celomic cavity, visceral serosa and musculature of cephalopod, crustacean and teleost intermediate hosts (Palm, 2004). Parasitism of Brazilian fish by trypanorhynch larvae has been reported in papers on taxonomy, parasite ecology and hygienicsanitary conditions (São Clemente et al, 1997;Felizardo et al, 2010, Oliveira et al, 2019, Diniz et al, 2021. Trypanorhynch larvae acquire significance due to their repugnant aspect, especially when present as massive infections in musculature and organs, which can make commercialization infeasible due to sanitary inspection and/or consumer rejection, thus resulting in economic losses (Oliveira et al, 2019;Diniz et al, 2021).…”

“…Parasitism of Brazilian fish by trypanorhynch larvae has been reported in papers on taxonomy, parasite ecology and hygienicsanitary conditions (São Clemente et al, 1997;Felizardo et al, 2010, Oliveira et al, 2019, Diniz et al, 2021. Trypanorhynch larvae acquire significance due to their repugnant aspect, especially when present as massive infections in musculature and organs, which can make commercialization infeasible due to sanitary inspection and/or consumer rejection, thus resulting in economic losses (Oliveira et al, 2019;Diniz et al, 2021). The allergenic potential of some of these cestode species has been studied in tests using murine models (Mattos et al, 2015).…”