Uso do metabissulfito de sódio no controle de microorganismos em camarões marinhos Litopenaeus vannamei (Boone, 1931)

Abstract

The cultivated shrimp comes if highlighting as one of the main responsible items for the superavit of the Brazilian's fish trade balance. Its drainage has been accomplished for North America and Europe, where the quality demands is extremely high, especially for microbial load existent at shrimp. Given the demands of importers, the aim was to evaluate the effectiveness of conservator sodium metabisulfite as an antimicrobial agent in the shrimp culture. Shrimps Litopenaeus vannamei classified as 81/100 (10 to 12 g) were submitted to 10 concentrations of sodium metabisulfite (from 1 to 10%), during 10 and 20 minutes. The aerobic mesophilic bacteria were counted and the isolated colonies were submitted to a bacterioscopic test using the Gram method and biochemical tests. It was observed that the number of colony-former units decreased due to metabisulfite use, thus demonstrating its inhibitory effect on the aerobic mesophilas bacteria at the concentrations used.