Vibrio vulnificus and Vibrio parahaemolyticus in Oysters under Low Tidal Range Conditions: Is Seawater Analysis Useful for Risk Assessment?

Audemard, Corinne; Ben‐Horin, Tal; Kator, Howard; Reece, Kimberly S.

doi:10.3390/foods11244065

Cited by 6 publications

(9 citation statements)

References 57 publications

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“…Many studies of environmental samples consider the specific relationship between temperature and salinity to be the most primary consideration in Vibrio ecology. Warm waters with moderate-to-high salinity are typical for high abundances of Vibrio measured in both temperate and warmer locales [55,110]. The first study to detect and quantify co-occurring Vibrio species in West African coastal waters also confirmed that SST and salinity were driving environmental factors of Vibrio densities, and Vv was highest at the end of the wet season [124].…”

Section: Salinitymentioning

confidence: 67%

“…16 Change in seagrass density. Strong, positive correlations between water temperature and Vv distribution and/or abundance have been demonstrated in numerous studies, such as [46,55,110,114,120,123,140] among others. Using a combination of DP-CH and MPN-qPCR with primer pairs previously described [61], Vibrio concentrations were enumerated in surface waters, sediments, and oysters in coastal waters of two states in the subtropical northern Gulf of Mexico region [100].…”

Section: Predictors Published Patterns and Correlated Ecological Factorsmentioning

confidence: 85%

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Tools to Enumerate and Predict Distribution Patterns of Environmental Vibrio vulnificus and Vibrio parahaemolyticus

Waidner,

Potdukhe

2023

Microorganisms

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Vibrio vulnificus (Vv) and Vibrio parahaemolyticus (Vp) are water- and foodborne bacteria that can cause several distinct human diseases, collectively called vibriosis. The success of oyster aquaculture is negatively impacted by high Vibrio abundances. Myriad environmental factors affect the distribution of pathogenic Vibrio, including temperature, salinity, eutrophication, extreme weather events, and plankton loads, including harmful algal blooms. In this paper, we synthesize the current understanding of ecological drivers of Vv and Vp and provide a summary of various tools used to enumerate Vv and Vp in a variety of environments and environmental samples. We also highlight the limitations and benefits of each of the measurement tools and propose example alternative tools for more specific enumeration of pathogenic Vv and Vp. Improvement of molecular methods can tighten better predictive models that are potentially important for mitigation in more controlled environments such as aquaculture.

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Section: Salinitymentioning

confidence: 67%

Section: Predictors Published Patterns and Correlated Ecological Factorsmentioning

confidence: 85%

Tools to Enumerate and Predict Distribution Patterns of Environmental Vibrio vulnificus and Vibrio parahaemolyticus

Waidner,

Potdukhe

2023

Microorganisms

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“…Here, the model detected the tiny variations of each scenario; the final concentration of V. parahaemolyticus was slightly higher in the non-ice scenario than that observed for the dockside ice treatment scenario and relatively higher when compared to the onboard ice treatment scenario. The model also reproduced the effect of the cold chain breaking in summer (Simulations [18][19], showing an oscillating pattern with V. parahaemolyticus growth and inactivation events. This effect was negligible in winter (Simulations 20-21).…”

Section: Discussionmentioning

confidence: 78%

“…Seawater temperature is a major factor determining the concentration, distribution, and proliferation of V. parahaemolyticus in the coastal environment [ 16 , 18 ]. Higher densities of V. parahaemolyticus in oysters have been detected in the spring and summer and are positively correlated with seawater temperature [ 16 , 19 ]. V. parahaemolyticus is rarely detected during winter, when Vibrio survives in the marine sediment until temperatures rise again to 14 °C and it is released to the seawater [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Predicting the Growth of Vibrio parahaemolyticus in Oysters under Varying Ambient Temperature

2023

Self Cite

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Temperature is a critical factor that influences the proliferation of pathogens in hosts. One example of this is the human pathogen Vibrio parahaemolyticus (V. parahaemolyticus) in oysters. Here, a continuous time model was developed for predicting the growth of Vibrio parahaemolyticus in oysters under varying ambient temperature. The model was fit and evaluated against data from previous experiments. Once evaluated, the V. parahaemolyticus dynamics in oysters were estimated at different post-harvest varying temperature scenarios affected by water and air temperature and different ice treatment timing. The model performed adequately under varying temperature, reflecting that (i) increasing temperature, particularly in hot summers, favors a rapid V. parahaemolyticus growth in oysters, resulting in a very high risk of gastroenteritis in humans after consumption of a serving of raw oysters, (ii) pathogen inactivation due to day/night oscillations and, more evidently, due to ice treatments, and (iii) ice treatment is much more effective, limiting the risk of illness when applied immediately onboard compared to dockside. The model resulted in being a promising tool for improving the understanding of the V. parahaemolyticus–oyster system and supporting studies on the public health impact of pathogenic V. parahaemolyticus associated with raw oyster consumption. Although robust validation of the model predictions is needed, the initial results and evaluation showed the potential of the model to be easily modified to match similar systems where the temperature is a critical factor shaping the proliferation of pathogens in hosts.

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“…Posi ve (33) No significant associa on (27,33) No significant associa on (27) Posi ve (27,33) Nega ve (beyond op mum level) (27,33) Chesapeake Bay Posi ve (45) No significant associa on (29,53) Posi ve (29,45,53) Posi ve (at low salinity) (53) Nega ve (45) with high salinity (53) No significant associa on ( (25) * psu is prac cal salinity units It is evident that some significant rela onship exists for chlorophyll (phytoplankton), water temperature and salinity with Vibrio across various geographies. However, this also highlights a limita on in comprehensively u lizing exis ng data sources.…”

Section: Gulf Of Mexicomentioning

confidence: 98%

Environmental Factors Associated with Incidence and Distribution ofV. parahaemolyticusandV. vulnificusin Chesapeake Bay, Maryland, USA: A three-year case study

Gangwar,

Usmani,

Jamal

et al. 2023

Preprint

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Members of the genusVibrioare ecologically significant bacteria native to aquatic ecosystems globally, and a few can cause diseases in humans. Vibrio-related illnesses have increased in recent years, primarily attributed to changing environmental conditions. Therefore, understanding the role of environmental factors in the occurrence and growth of pathogenic strains is crucial for public health. Water, oyster, and sediment samples were collected between 2009 and 2012 from Chester River and Tangier Sound sites in Chesapeake Bay, Maryland, USA, to investigate the relationship between water temperature, salinity, and chlorophyll with the incidence and distribution ofVibrio parahaemolyticus(VP) andVibrio vulnificus(VV). Odds ratio analysis was used to determine association between the likelihood of VP and VV presence and these environmental variables. Results suggested that water temperature threshold of 20°C or higher was associated with an increased risk, favoring the incidence ofVibrio spp. A significant difference in salinity was observed between the two sampling sites, with distinct ranges showing high odds ratio forVibrioincidence, especially in water and sediment, emphasizing the impact of salinity on VP and VV incidence and distribution. Notably, salinity between 9-20 PPT consistently favored theVibrioincidence across all samples. Relationship between chlorophyll concentrations and VP and VV incidence varied depending on sample type. However, chlorophyll range of 0-10 µg/L was identified as critical in oyster samples for both vibrios. Analysis of odds ratios for water samples demonstrated consistent outcomes across all environmental parameters, indicating water samples offer a more reliable indicator ofVibrio spp.incidence.ImportanceUnderstanding the role of environmental parameters in the occurrence ofVibriospecies posing significant public health risks and economic burdens such asVibrio parahaemolyticusandVibrio vulnificusare of paramount importance. These aquatic bacteria are responsible for various human diseases, including gastroenteritis and wound infections, which can be severe and sometimes fatal. Recent observations suggest that certain environmental conditions may favor the growth ofVibrio, leading to more severe disease outcomes. By investigating the environmental factors that influence the occurrence ofVibrio parahaemolyticusandVibrio vulnificus, the need to gain insights into the favorable ranges of environmental variables is apparent. The significance of this research is in identifying the favorable ranges of environmental and ecological factors, which holds the potential to provide an aid in the intervention and mitigation strategies through the development of predictive models, ultimately enhancing our ability to manage and control diseases caused by these pathogens.

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Vibrio vulnificus and Vibrio parahaemolyticus in Oysters under Low Tidal Range Conditions: Is Seawater Analysis Useful for Risk Assessment?

Cited by 6 publications

References 57 publications

Tools to Enumerate and Predict Distribution Patterns of Environmental Vibrio vulnificus and Vibrio parahaemolyticus

Tools to Enumerate and Predict Distribution Patterns of Environmental Vibrio vulnificus and Vibrio parahaemolyticus

Predicting the Growth of Vibrio parahaemolyticus in Oysters under Varying Ambient Temperature

Environmental Factors Associated with Incidence and Distribution ofV. parahaemolyticusandV. vulnificusin Chesapeake Bay, Maryland, USA: A three-year case study

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