Investigação da ocorrência dos vírus da síndrome da mancha branca (WSSV) e da infecção hipodermal e necrose hematopoiética (IHHNV) em camarões coletaods em área sob influência de eflurntes da carcinicultura.

Abstract

The main viral diseases detected in the world shrimp culture are White Spot Syndrome Virus (WSSV), Infectious Hypodermal and Hematopoietic Necrosis Virus (IHHNV), Taura Syndrome Virus (TSV) and Yellow Head Virus (YHV), this last one without records in Brazilian shrimp cultures. The viral diseases above described are not restricted to the culture environment. WSSV was detected in many peneid species, as well as in other groups of wild crustaceans. IHHNV seems to be restricted to peneids, being also detected in wild populations. This study had investigated, a watercourse in the Jaguaribe River estuary, close to Canavieiras community in Aracati, Ceará State, which receives effluents from shrimp farms. This research aimed to verify possible escapes of the species Litopenaeus vannamei to the surrounding environment and occurrence of WSSV and IHHNV in populations of wild shrimps. With this objective, 450 shrimps were caught by drawing and fishing net in three stations during three collections carried out on March, April and May 2006. For viral research, molecular biology tools (Polymerase Chain Reaction - PCR) and classical histology procedures were used. Animal’s identification showed escape of the exotic species. It was not detected WSSV presence in the analyzed samples. Nevertheless, it was detected IHHNV presence in 17 individuals, it being six L. vannamei, eight Farfantepenaeus subtilis, one F. brasilensis and two L. schmitti, showing the susceptibility of these native species to IHHNV.