Vida útil dos mexilhões Perna perna cultivados no litoral norte de São Paulo: aferição dos parâmetros físico-químicos e microbiológicos. / The mussels Perna perna shelf-life cultivated in the são paulo state north coast: gauging of the physicochemistry and microbiological parameters.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2004

RESUMO

The quality for consumption of the bivalve mollusks is intimately linked to the environment quality, where these are inserted. In function of the current environmental degradation caused by the growth population and consequent increase in the discharge of sewage in the environment, as well as, for the absence of quality management programs of the cultivation’s waters and the Ubatuba’s city, SP., clandestine marketing fish. For the consumer s safety was necessary to characterize, in the physicochemistry and microbiological aspects, the mussels Perna perna cultivated and marketed in this region. Three different cultivation points were chosen in Ubatuba; Engenho da Almada and Barra Seca’s beaches and Costão’s coast; where the mussels were collected for evaluation from November, 2002 to March, 2003. The analysis determined were: non-protein-nitrogen (NPN), total volatile basic nitrogen (TVBN), trimethylamine (TMA), pH and proximal composition analysis’s, microbiological counts of the meat and cultivation water for total and fecal coliforms, Staphylococcus aureus and Salmonella. During most of the study period, the samples presented satisfactory quality with the effective legislation for fish, in all the analyzed requirements, excepted on February, when the TMA value finded (6,9mg N/100g) overcome the standard 4mg N/ 100g. In March, the Barra Seca’s mussels occurs inadequate for the direct human consumption, because of the positive result to Salmonella sp. The largest total coliforms counts happened in mussels cultivated in densely populated areas and that received sewage without previous treatment (Barra Seca), except in November, when the mussels from Cedro’s coast have largest counts of these microorganisms (1,3x103 NMP/ g). The microbial counts of the meat always overcame of the respective cultivation water and, the overcome of fecal coliforms count of water from Barra Seca (5,7x101 NMP/ mL), on March coincided with the detection to Salmonella sp.

ASSUNTO(S)

salmonella mexilhão segurança alimentar mussel vida-de-prateleira food pafety salmonella shelf-life

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