Biomarkers (glutathione S-transferase and catalase) and microorganisms in soft tissues of Crassostrea rhizophorae to assess contamination of seafood in Brazil
2020
Ribeiro, Eliane Braga | Noleto, Katherine Saldanha | de Oliveira, Suelen Rosana Sampaio | Batista de Jesus, Wanda | de Sousa Serra, Ilka Márcia Ribeiro | Almeida, Zafira da Silva de | de Sousa de Oliveira Mota Andrade, Ticianne | de Araújo Soares, Rômulo | Antonio, Ícaro Gomes | Santos, Débora Martins Silva | Jorge, Marianna Basso | Fortes Carvalho Neta, Raimunda Nonata
The goal of this study was to evaluate biomarkers (glutathione S-transferase and catalase) and microorganisms in soft tissues of Crassostrea rhizophorae to assess possible contamination of seafood in Brazil. The oysters were sampled from a reference area (Ports 1 and 2) and an impacted area (Ports 3 and 4) in Brazil (São Luís Island, Maranhão). Six attributes were examined in sampled oysters: glutathione S-transferase activity, catalase activity, concentrations of total coliforms and thermotolerant coliforms, and levels of Escherichia coli and Aeromonas hydrophila. Water samples were analysed for aluminium, cadmium, iron, manganese, lead, mercury, phenolics, and polychlorinated biphenyls. We found that Ports 3 and 4 are impacted by several contaminants (mercury, phenolics, and polychlorinated biphenyls), while Ports 1 and 2 are still relatively free of these contaminants. Changes in enzymes activity as well as the highest tissue bacterial concentrations were recorded in oysters from Ports 3 and 4 during the rainy season.
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