Prospecção de moluscos bivalves no estudo da poluição dos rios Cachoeira e Santana em Ilhéus, Bahia, Brasil

Sande, Denise; Melo, Tauá Alves; Oliveira, Gilvia Simone Andrade; Barreto, L. E. G. de S.; Talbot, Teddy; Boehs, Guisla; Andrioli, João Luciano

doi:10.11606/issn.1678-4456.bjvras.2010.26854

Cited by 17 publications

(12 citation statements)

References 6 publications

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“…According to Sande et al (2010) and Brandão et al (2013), both the Cachoeira River estuary and Camamu Bay are considered suitable areas for extracting mollusks, which are used as a source of food for the coastal population, as well as for sale during the high season, as summer. Bivalve mollusks reflect the conditions in which they live and are considered bioindicators of environmental contamination (Miller et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

Detection of Toxoplasma gondii DNA in Brazilian oysters (Crassostrea rhizophorae)

et al. 2015

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ABSTRACT. The aim of this study was to detect evidence of Toxoplasma gondii using polymerase chain reaction (PCR)-based techniques in oysters (Crassostrea rhizophorae) obtained from the southern coastal region of Bahia, Brazil. A total of 624 oysters were collected, and the gills and digestive glands were dissected. Each tissue sample was separated into pools containing tissues (of the same type) from three animals, leading to a total of 416 experimental samples for analysis (208 samples each from the gills and digestive glands). Molecular analysis using PCR-based detection of the T. gondii AF 146527 repetitive fragment yielded negative results for all samples. However, when nested-PCR was used for detection of the T. gondii SAG-1 gene, 17 samples were positive, with the gills being the tissue with maximal detection of the parasite. These positive results were confirmed by sample sequencing. It is therefore suggested that C. rhizophorae oysters are capable of filtering and retaining T. gondii oocysts in their tissue. This represents a risk to public health because they are traditionally ingested in natura.

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Section: Discussionmentioning

confidence: 99%

Detection of Toxoplasma gondii DNA in Brazilian oysters (Crassostrea rhizophorae)

et al. 2015

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“…É um molusco provido de concha, filtrador, que se enterra no substrato lodoso, na zona de águas calmas, com profundidade que varia de 15 a 20 cm. É encontrado principalmente em areia, na faixa úmida das praias, ou sob rochas próximas de mangues (SANDE et al, 2010). Sua distribuição costeira e estuarina, facilita a exploração comercial, que é marcada por intenso extrativismo, o que pode prejudicar o crescimento populacional desses organismos ou até mesmo levar suas reservas naturais à extinção (DELFINO, 2005).…”

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CARACTERIZAÇÃO FÍSICO-QUÍMICA E MICROBIOLÓGICA DA CARNE DO MOLUSCO BIVALVE SARNAMBI (Phacoides pectinitus) COLETADO NAS PRAIAS EM ALGODOAL E SALINÓPOLIS, NO PARÁ

Salles

Macedo

Figueiredo

2017

R. bras. Tecnol. Agroindustr.

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O Sarnambí (Lucina pectinata) é um molusco muito encontrado em praias paraenses e possui grande aceitabilidade por parte de seus consumidores. No entanto, poucas pesquisas foram realizadas visando conhecer suas características físico-químicas e higiênico-sanitárias. Assim, este trabalho objetivou avaliar as características físico-químicas e microbiológicas da carne do sarnambí coletada na praia da Lua Cheia, localizada na Ilha de Algodoal (Amostra A) e praia do Paraíso na Vila de Cuiarana, município de Salinópolis (Amostras B), no Estado do Pará e realizar um levantamento sobre o método de extração da carne deste molusco. Foram determinados os níveis de umidade, proteínas, lipídeos, colesterol, resíduo mineral fixo, carboidrato, valor calórico, pH, bases nitrogenadas voláteis totais, e minerais (ferro, cobre, magnésio, manganês, zinco e potássio) para a caracterização físico-química. Apesar da carne do sarnambí ser muito apreciada por seus consumidores, e uma alternativa de renda para as comunidades que vivem às margens das praias; existem poucos estudos científicos sobre suas características nutricionais e higiênico-sanitárias. Assim, este trabalho tem como objetivo avaliar as caracteristicas físico-quimicas e microbiológicas da carne do sarnambí coletado nas praias em Algodoal e Salinópolis, no Estado do Pará, bem como realizar um levantamento sobre o método de extração da carne deste molusco.

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“…Considering the importance of bivalves regarding social and environmental aspects for coastal communities (SANDE et al, 2010), various factors may present a risk to the preservation of natural stocks and consequent environmental unsustainability. So far, there is not a positioning as to the pathogenic potential of the parasite in question or to its degree of mortality; however, the inexistence of this information does not discard the need for monitoring.…”

Section: Discussionmentioning

confidence: 99%

Parasitism by Nematopsis sp. (Apicomplexa: Eugregarinida) in Mytella guyanensis at the Marine Extractive Reserve Baía do Iguape, Bahia, Brazil

Camilo¹,

Souza²,

Freitas³

et al. 2019

Braz. J. Vet. Res. Anim. Sci.

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Several studies show the presence of protozoa of the genus Nematopsis Schneider, 1892, in many species of bivalves. The pathogenicity of this Apicomplexa is still much debated, which is possibly related to the parasitism degree and host habitat. In this context, this study investigated parasitism by Nematopsis sp. in Mytella guyanensis (Bivalvia: Mytilidae) in a mangrove of the Marine Extractive Reserve Baía do Iguape, Bahia, Brazil. The collections were made monthly, from March 2014 to March 2015, consisting of 30 adults with shell height above 40 mm per month, totaling 360 specimens. The specimens were measured, weighed, opened, and macroscopically examined for identifying parasites and/or signs of morphological changes. After that, they were fixed in Davidson’s solution and processed according to classical histological techniques, with inclusion in paraffin, obtaining 5 μm-thick sections by microtomy, and stained by Harris’ Hematoxylin and Eosin (HE). The water temperature ranged from 25.5 to 33.6 ºC and the salinity from 21.1 to 34.3 Practical Salinity Units (PSU). The specimens measured between 41.1 and 68.6 mm and had an average weight of 7.24 g. Macroscopically, there was no presence of the parasite or any morphological changes related its presence. The frequency percentage of Nematopsis sp. was 99.45%. The mantle was the organ with the highest frequency of infection (46.26%), followed by the gonads (18.36%). Among the analyzed organs, all presented the parasite and, in a few severely infected cases, microscopical changes were observed in the mantle conformation. The infection intensity for most of the sessions analyzed was 1 to 3 oocysts/phagocyte; however, in one of the sessions, 9 oocysts/phagocytes were recorded. The parasite had a negative correlation with salinity. The high frequency of Nematopsis sp. should be considered for the sustainability of natural stocks, especially if such parasitism occurs simultaneously with other pathogens and stressful environmental conditions.

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Prospecção de moluscos bivalves no estudo da poluição dos rios Cachoeira e Santana em Ilhéus, Bahia, Brasil

Cited by 17 publications

References 6 publications

Detection of Toxoplasma gondii DNA in Brazilian oysters (Crassostrea rhizophorae)

Detection of Toxoplasma gondii DNA in Brazilian oysters (Crassostrea rhizophorae)

CARACTERIZAÇÃO FÍSICO-QUÍMICA E MICROBIOLÓGICA DA CARNE DO MOLUSCO BIVALVE SARNAMBI (Phacoides pectinitus) COLETADO NAS PRAIAS EM ALGODOAL E SALINÓPOLIS, NO PARÁ

Parasitism by Nematopsis sp. (Apicomplexa: Eugregarinida) in Mytella guyanensis at the Marine Extractive Reserve Baía do Iguape, Bahia, Brazil

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