Depuration of Bacterial Populations in the Indian Backwater Oyster<i>Crassostrea madrasensis</i>(Preston, 1916): Effects on Surface and Bottom Held Oysters

Chinnadurai, S.; Mohamed, K S; Venkatesan, V.; Sharma, Jenny; Kripa, V.

doi:10.2983/035.033.0209

Cited by 7 publications

(4 citation statements)

References 29 publications

(34 reference statements)

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“…This is in agreement with many of the previous studies from India (Raveendran et al, 1990;Lalitha and Surendran, 2004;Sasikumar and Krishnamoorthy, 2010;Hassan et al, 2013). Recent study by Chinnadurai et al (2014) showed that Indian back water oysters accumulated bacterial loads above the threshold limits during the winter monsoon and they demonstrated the depuration of oysters to reduce FC and E.coli to safe levels can be accomplished within 24 h.…”

Section: Discussionsupporting

confidence: 80%

Assessment of bio-accumulation of bacteria in oysters from shellfish growing waters in Ashtamudi Lake (Kerala, India): A RAMSAR wetland

Chinnadurai

Mohamed

Sharma

et al. 2016

Regional Studies in Marine Science

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h i g h l i g h t s• In India, this is the first-ever assessment, which offer an insight on the accumulation of bacteria in farmed oysters.• We investigated the dynamic process of microbial bio-accumulation and how it is influenced by rainfall.• Bio-accumulation was high during the pre-monsoon season when the Lake is brackish.• Salinity and temperature play a major role in the survival of coliform bacteria in the shellfish growing water.• We can reduce input costs in the laboratory by analysing faecal coliform as a quality indicator instead of using E. coli as an indicator. a r t i c l e i n f o

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Section: Discussionsupporting

confidence: 80%

Assessment of bio-accumulation of bacteria in oysters from shellfish growing waters in Ashtamudi Lake (Kerala, India): A RAMSAR wetland

Chinnadurai

Mohamed

Sharma

et al. 2016

Regional Studies in Marine Science

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“…For EC counts after 24 h, reductions were 2.28 and 1.32 log MPN/g oyster at the surface and bottom, respectively. Significant differences in TC and EC microbial reduction were only noticed up to 24 h and not at 36 or 48 h [44].…”

Section: Microbial Inactivation Efficacy Of Pasw10 (1:1) Against Tota...mentioning

confidence: 81%

“…After 24 h of depuration, EC counts in Crassostrea gigas oysters were reduced by 1.1 log MPN/100 g [43]. In another study, Crassostrea madrasensis oysters in a static depuration system with 200 L seawater at a pH of 8.1, salinity of 32.5, and temperature of 30.3 • C were measured to quantify microbial reductions in TC and EC after a 48 h period [44]. Static depuration took place either near the surface of the water or at the tank's bottom.…”

Section: Microbial Inactivation Efficacy Of Pasw10 (1:1) Against Tota...mentioning

confidence: 99%

Antimicrobial Effects of Plasma-Activated Simulated Seawater (PASW) on Total Coliform and Escherichia coli in Live Oysters during Static Depuration

Campbell,

Hall,

Salvi

2023

Fishes

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Recently, our in vitro study on the effects of plasma-activated simulated seawater (PASW) demonstrated its potential as a novel, alternative disinfectant in oyster depuration. In this current study, PASW’s physicochemical and antimicrobial properties were identified and its effects on oyster quality were observed. Simulated seawater (SS) activated by plasma for 10 min (PASW10) increased in temperature, oxidation reduction potential, and electrical conductivity with a decrease in those parameters after 1:1 dilution with SS (PASW10 (1:1)). The pH decreased immediately after plasma activation and subsequently increased after dilution. Nitrate and nitrite concentrations were higher in PASW10 (1:1) compared to PASW10 (3:1). No free available chlorine was detected in undiluted PASW10. Processing using SS and PASW10 (1:1) depuration and refrigeration of E. coli-bioaccumulated oysters was observed. Significantly higher reductions in total coliform and E. coli were noted for PASW10 (1:1) treated oyster samples after 24 h compared to refrigerated samples. No significant differences in values for condition index or biting force of oyster meats were observed for the processed samples after 24 h. Overall, the novel and environment-friendly PASW could be used as an alternative antimicrobial disinfectant in oyster depuration systems because it does not negatively affect an oyster’s viability or quality.

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“…The main cultivation areas are concentrated in the Vembanad and Ashtamudi, two estuarine systems that open to the central Arabian Sea. Currently, the main species harvested in these estuaries are the green mussel (Perna viridis) and the edible oyster (Crassostrea madrasensis) (Chinnadurai et al, 2014;Mohamed et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Baseline health risk assessment of trace metals in bivalve shellfish from commercial growing areas in the estuaries of Ashtamudi and Vembanad (Kerala, India)

Chinnadurai

Campos

Geethalakshmi

et al. 2021

Environ Sci Pollut Res

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Trace metal concentrations were monitored in the yellow clam (Paphia malabarica), green mussel (Perna viridis) and edible oyster (Crassostrea madrasensis) from growing areas in the Ashtamudi and Vembanad estuaries, Kerala. Ranges of mean annual concentrations (mg/kg) were Ni (0.46-0.65); Co (2.87-3.49); Fe (80.0-119.4); Mn (3.88-9.38); Zn (40.8-76.2); Pb (1.28-2.00); . In Ashtamudi, clams had higher mean concentrations of Ni, Co, Fe, Mn and Pb than oysters. Mean concentrations of Ni, Pb (in all species), Zn (in clams and mussels) and Cu (in mussels) did not exceed maximum permissible limits mandated by the Food Safety and Standards Authority of India. Mean Mn concentrations exceeded the World Health Organization guideline in the three species while mean Fe concentrations in clams and oysters did not exceed the guideline. Target hazard quotients were generally ≤ 1, except for a few Pb results in clams and mussels. Although results suggest no health risk to consumers for the reference doses, daily intakes and elements considered, regular monitoring of trace metals is recommended to maintain consumer protection given increasing anthropogenic and climatic pressures on the shell sh growing areas.

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Depuration of Bacterial Populations in the Indian Backwater OysterCrassostrea madrasensis(Preston, 1916): Effects on Surface and Bottom Held Oysters

Cited by 7 publications

References 29 publications

Assessment of bio-accumulation of bacteria in oysters from shellfish growing waters in Ashtamudi Lake (Kerala, India): A RAMSAR wetland

Assessment of bio-accumulation of bacteria in oysters from shellfish growing waters in Ashtamudi Lake (Kerala, India): A RAMSAR wetland

Antimicrobial Effects of Plasma-Activated Simulated Seawater (PASW) on Total Coliform and Escherichia coli in Live Oysters during Static Depuration

Baseline health risk assessment of trace metals in bivalve shellfish from commercial growing areas in the estuaries of Ashtamudi and Vembanad (Kerala, India)

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