Occurrence of Ascocotyle sp. (Digenea: Heterophyidae) in grey mullets (Osteichthyes: Mugilidae) commercialized in Iguape, Sao Paulo, Brazil / Ocorrência de Ascocotyle sp. (Digenea: Heterophyidae) em mugilídeos (Osteichthyes: Mugilidae) comercializados no município de Iguape, São Paulo, Brasil

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

30/06/2011

RESUMO

The world spread of oriental culture and the common use of fish which is not cooked showed some problems related to them like diseases caused by parasites. There is a great incidence of Ascocotyle sp. parasites in mullets fishes, which are part of human culinary spread all over world. The aim of the present study is to estimate the presence of trematode Heterophyidae metacercariae among mullets fishes commercialized at Iguape city; to evaluate the prevalence and density of metacercariae among fishes from the sea and river; to stablish the inter-relation between the presence of metacercariae and the fishes morphometry; to ascertain food habits among people from Iguape city and relate food fish habits to zoonosis occurrence. 120 fishes were select, 60 Mugil liza and 60 Mugil curema, half of each species from the sea and the other half from the river. All fishes biometrical data have been score and, pos-mortem, 5g of visceral pool and muscular tissue from each sample have been fragmented and homogeneized in order to stablish the presence and amount of metacercariae. M. liza were 45,6 ± 4,8 cm length and 860,6 ± 228,4g weigth; M. curema were 36,2 ± 2,4 cm length and 448,5 ± 127,8g weigth. Metacercariae identified as Ascocotyle were present in all fishes. There were no differences for prevalence between fishes sex. The major concentration of metacercariae samples have been identified in visceral organs when compared to muscular tissue of both fish species and much greater at visceral organs from M. liza. Larval visceral concentration of M. curema was significantly high among river species. Pearson correlation tests did not show close association between metacercariae prevalence/density and biometrial fish data. People from Iguape city use to eat grilled or cooked mullet. Total of 3,2% of people consume raw fish.

ASSUNTO(S)

ascocotyle metacercária peixes mugilídeos ascocotyle metacercariae gray mullets

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