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Biomarkers (glutathione S-transferase and catalase) and microorganisms in soft tissues of Crassostrea rhizophorae to assess contamination of seafood in Brazil

2020; Elsevier BV; Volume: 158; Linguagem: Inglês

10.1016/j.marpolbul.2020.111348

1879-3363

Eliane Braga Ribeiro, Katherine Saldanha Noleto, Suelen Rosana Sampaio de Oliveira, Wanda Batista de Jesus, Ilka Márcia Ribeiro de Souza Serra, Zafira da Silva de Almeida, Ticianne de Sousa de Oliveira Mota Andrade, Rômulo de Araújo Soares, Ícaro Gomes Antônio, Débora Martins Silva Santos, Marianna Basso Jorge, Raimunda Nonata Fortes Carvalho Neta,

Pharmaceutical and Antibiotic Environmental Impacts

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.