title: Anisakid larva parasitizing Plagioscion squamosissimus in Marajó Bay and Tapajós River, state of Pará, Brazil.
abstract: In November 2014 and May 2015, a total of 44 specimens of the South American silver croaker Plagioscion squamosissimus were collected: 30 in Marajó Bay and 14 in the Tapajós River, state of Pará, Brazil. The aim was to investigate the presence of anisakid nematodes and determine their parasitism indices and sites of infection, because of their importance regarding health inspection. Sixty-nine Anisakis sp. larvae were found; among them, 16 larvae in seven fish collected in Marajó Bay and 53 larvae in four fish in the Tapajós River. The parasitism indices of the nematodes collected from the fish in Marajó Bay comprised prevalence (P) of 23%, mean infection intensity (MI) of 2.28, mean abundance (MA) of 0.53, range of infection (RI) of 1-4, and infection site (IS) in the mesentery. The fish from the Tapajós River showed P = 28%, MI = 13.2, MA = 3.8, RI = 1-22, and IS = mesentery and intestine. To assist in taxonomic identification, images of the specimens obtained through optical microscopy with Nomarski's interferential contrast system and scanning electron microscopy were used. This is the first record of Anisakis sp. parasitizing P. squamosissimus.
authors.affiliation: Programa de Pós-graduação em Higiene Veterinária e Processamento Tecnológico de Produtos de Origem Animal, Universidade Federal Fluminense - UFF, Niterói, RJ, Brasil.|Laboratório de Inspeção e Tecnologia de Pescado, Universidade Federal Fluminense - UFF, Niterói, RJ, Brasil.
authors.forename: Gabrielle
authors.initials: G
authors.lastname: Fontenelle
authors.affiliation: Laboratório de Helmintos Parasitos de Vertebrados, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brasil.
authors.forename: Marcelo
authors.initials: M
authors.lastname: Knoff
authors.affiliation: Laboratório de Inspeção e Tecnologia de Pescado, Universidade Federal Fluminense - UFF, Niterói, RJ, Brasil.
authors.forename: Nilza Nunes
authors.initials: NN
authors.lastname: Felizardo
authors.affiliation: Laboratório de Helmintologia Romero Lascasas Porto, Faculdade de Ciências Médicas, Universidade do Estado do Rio de Janeiro - UERJ, Rio de Janeiro, RJ, Brasil.
authors.forename: Eduardo José Lopes
authors.initials: EJ
authors.lastname: Torres
authors.affiliation: Laboratório de Pesquisa Carlos Azevedo, Instituto de Saúde e Produção Animal, Universidade Federal Rural da Amazônia - UFRA, Belém, PA, Brasil.
authors.forename: Edilson Rodrigues
authors.initials: ER
authors.lastname: Matos
authors.affiliation: Laboratório de Helmintos Parasitos de Vertebrados, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz - FIOCRUZ, Rio de Janeiro, RJ, Brasil.
authors.forename: Delir Corrêa
authors.initials: DC
authors.lastname: Gomes
authors.affiliation: Laboratório de Inspeção e Tecnologia de Pescado, Universidade Federal Fluminense - UFF, Niterói, RJ, Brasil.
authors.forename: Sérgio Carmona de
authors.initials: SC
authors.lastname: São Clemente
mesh_terms: D000818:Animals; D017163:Anisakis; D061006:Bays; D001938:Brazil; D007814:Larva; D010473:Perciformes / Q000469:parasitology*; D045483:Rivers