Incidence of Larval Anisakiosis in Ocean Fish Sold Through Network of Supermarket Stores

Abstract

Investigations conducted on a sample of 33 ocean fish of consumption, mackerel and herring uneviscerated and frosen, packed in plastic bags, different weights and purchased from supermarket chain stores, concerning the incidence and intensity of parasitism by larvae of Anisakis sp. to gut and visceral level, lesion picture caused and also some morphological measurements, reveals an incidence of anisakiasis of 60.0% to 72.2% in mackerel and respectively in herring. Regarding the infestation intensity of Anisakis larvae sp., infestations dominate weakly the mackerel (44.4%), followed by medium (33.3%) and massive (22.0%). In contrast to the herring are  dominant the medium infestations (46.1%), followed by massive (30.7%) and low infestations (23.1%).Table of lesion caused by larval stages in gut and visceral level is characterized by intestinal congestion, hemorrhagic enteritis and hemoragico – necrotic and the presence of larval cystic foci on serous of gut, kidneys, liver and gonads. Morphological investigations carried out on a sample of 20 larvae, collected from herring and mackerel, regarding biometric aspects, cuticular and of color, body size variables highlights from 13.0 mm / 0.6 mm minimum to 27.0 / 0.6 mm maximum, with an average of 20.0 mm / 0.5 mm, comparable to those presented in the speciality literature.