Spatio-Temporal Variations in Pathogenic Bacteria in the Surface Sediments of the Zuari Estuary, Goa, India

Gardade, Laxman; Khandeparker, Lidita

doi:10.18520/cs/v113/i09/1729-1738

Cited by 14 publications

(3 citation statements)

References 41 publications

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“…Typically, bacteria in aquatic environments are strongly associated with particulate matter. The association of bacteria is stronger in finer sediments and is strongly influenced by the quantity and type of clay minerals and organic matter (Hassard et al 2016;Gardade and Khandeparker 2017). The attachment of fecal coliforms to the fine particles increases their viability and transport to the sediment bed (Fries et al 2006).…”

Section: Resultsmentioning

confidence: 99%

Spatio-temporal Variations in Bacterial Abundance with an Emphasis on Fecal Indicator Bacteria and Vibrio spp. in and around Visakhapatnam Port, East Coast of India

Khandeparker

Desai

Sawant

et al. 2020

AJSTD

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The ecological health of port environments, which are dynamic and hotspots of anthropogenic activities, can be analyzed using specific pathogenic bacteria as they provide definite evidence and source of pollution. The influence of seasons and environmental settings on total bacterial count (TBC), distribution of fecal indicators, and Vibrio spp. was explored in Visakhapatnam port, located along the east coast of India. South-west monsoon had a significant influence on TBC, fecal indicators, and Vibrio spp., and the abundance was influenced by the eutrophic environment in the inner harbour. Fecal indicators were one order higher in sub-surface water when compared with sediment, indicating their inoculation due to turbulent conditions in south-west monsoon. The abundance of V. cholerae was influenced by salinity, temperature, and SPM, and was positively correlated to plankton; relating their distribution with disease dynamics and ecosystem functioning is a step ahead. Such an assessment is important from the perspective of human health and marine bioinvasion.

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Section: Resultsmentioning

confidence: 99%

Spatio-temporal Variations in Bacterial Abundance with an Emphasis on Fecal Indicator Bacteria and Vibrio spp. in and around Visakhapatnam Port, East Coast of India

Khandeparker

Desai

Sawant

et al. 2020

AJSTD

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“…Salinity has been identified as an additional driver of pathogen composition in estuaries, especially among Vibrio spp. [19,190]. However, studies have demonstrated that this relationship is not linear when salinities vary widely [191,192].…”

Section: Discussionmentioning

confidence: 99%

Oyster Reefs Are Reservoirs for Potential Pathogens in a Highly Disturbed Subtropical Estuary

Sweat,

Busch,

Craig

et al. 2023

Environments

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Estuaries worldwide are grappling with deteriorating water quality and benthic conditions that coincide with the rising detection of pathogenic and potentially pathogenic microbes (PPM). Both indigenous PPM and those that enter estuaries through urban and agricultural runoff are funneled through suspension-feeding organisms and deposited onto the benthos, where they can be moved through food webs. This study explored PPM communities in the Indian River Lagoon system, a biodiverse but urbanized estuary in east central Florida (USA). PPM were surveyed in estuary water, at stormwater outfalls, and in biodeposits of a key suspension feeder, the eastern oyster Crassostrea virginica. A total of 52 microbial exact sequence variants, with per-sample relative abundances up to 61.4%, were identified as PPM. The biodeposits contained relatively more abundant and diverse PPM than the water samples. PPM community composition also differed between seasons and between biodeposits and water. The community differences were driven primarily by Vibrio and Pseudoalteromonas spp. This investigation provides evidence that, through biodeposition, oyster reefs in the IRL estuary are a reservoir for PPM, and it documents some taxa of concern that should be conclusively identified and investigated for their pathogenicity and potential to pervade food webs and fisheries.

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“…Along the Zuari estuary on the central west coast of India and during three seasons (pre-monsoon, monsoon, and post-monsoon), organic matter determined the distribution of Vibrio spp., with high values during the monsoon, probably due the terrestrial runoff [53]. In Guinea Bissau, the abundance of Vibrio spp.…”

Section: Nichementioning

confidence: 99%

Vibrio spp.: Life Strategies, Ecology, and Risks in a Changing Environment

et al. 2022

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Vibrios are ubiquitous bacteria in aquatic systems, especially marine ones, and belong to the Gammaproteobacteria class, the most diverse class of Gram-negative bacteria. The main objective of this review is to update the information regarding the ecology of Vibrio species, and contribute to the discussion of their potential risk in a changing environment. As heterotrophic organisms, Vibrio spp. live freely in aquatic environments, from marine depths to the surface of the water column, and frequently may be associated with micro- and macroalgae, invertebrates, and vertebrates such as fish, or live in symbiosis. Some Vibrio spp. are pathogenic to humans and animals, and there is evidence that infections caused by vibrios are increasing in the world. This rise may be related to global changes in human behavior (increases in tourism, maritime traffic, consumption of seafood, aquaculture production, water demand, pollution), and temperature. Most likely in the future, Vibrio spp. in water and in seafood will be monitored in order to safeguard human and animal health. Regulators of the microbiological quality of water (marine and freshwater) and food for human and animal consumption, professionals involved in marine and freshwater production chains, consumers and users of aquatic resources, and health professionals will be challenged to anticipate and mitigate new risks.

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Spatio-Temporal Variations in Pathogenic Bacteria in the Surface Sediments of the Zuari Estuary, Goa, India

Cited by 14 publications

References 41 publications

Spatio-temporal Variations in Bacterial Abundance with an Emphasis on Fecal Indicator Bacteria and Vibrio spp. in and around Visakhapatnam Port, East Coast of India

Spatio-temporal Variations in Bacterial Abundance with an Emphasis on Fecal Indicator Bacteria and Vibrio spp. in and around Visakhapatnam Port, East Coast of India

Oyster Reefs Are Reservoirs for Potential Pathogens in a Highly Disturbed Subtropical Estuary

Vibrio spp.: Life Strategies, Ecology, and Risks in a Changing Environment

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