The effect of off-bottom versus on-bottom oyster culture on total and pathogenic Vibrio spp. abundances in oyster tissue, water and sediment samples

Scro, Abigail K.; Westphalen, James; Kite-Powell, Hauke L.; Brawley, John W.; Smolowitz, Roxanna

doi:10.1016/j.ijfoodmicro.2022.109870

Cited by 3 publications

(2 citation statements)

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“…Additionally, the correlation matrix ( Figure 3 ) suggests that salinity and pH, which are predicted to change with the overall ocean temperature [ 34 ], also positively affected the presence of V. harveyi in the aquaculture tank. These findings are consistent with prior research on the effects of environmental parameters on Vibrio species in natural and aquaculture settings, where a positive correlation between salinity and temperature with the frequency of detection of Vibrio species has been reported [ 35 , 36 ]. The DO concentration is reported to have a negative correlation with the temperature, given that increased water temperatures lead to decreased DO levels [ 37 ].…”

Section: Discussionsupporting

confidence: 92%

Temporal and Spatial Dynamics of Vibrio harveyi: An Environmental Parameter Correlation Investigation in a 4-Metre-Deep Dicentrarchus labrax Aquaculture Tank

Da Fonseca Ferreira,

Roquigny,

Grard

et al. 2024

Microorganisms

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Nowadays, European seabass (Dicentrarchus labrax) aquaculture is undergoing a significant expansion. Nevertheless, the aquaculture industry is plagued by vibriosis. The spatial and temporal dynamics of Vibrio harveyi were studied on a European seabass farm in northern France during seven months of 2022. Concrete specimens were suspended and water was pumped from different depths (0.3 m, 2.15 m and 4 m deep), providing insights into the biofilm and planktonic V. harveyi dynamics. The abundances of V. harveyi, in the biofilm and free-living forms, were positively correlated. The water parameters revealed seasonal fluctuations in temperature, pH, and salinity, with no significant differences observed across the water column. Quantification of V. harveyi revealed no significant differences between depths, but seasonality, with peak abundances observed in August, correlated with temperature increases. Principal component analysis identified temperature as a primary driver, but also additional parameters, such as salinity and pH. Vibriosis occurred during the sampling period, providing valuable insights into the conditions before, during, and after the outbreaks. This study underscores the importance of understanding V. harveyi behaviour in aquaculture, particularly in the context of global warming, for effective disease management and sustainable practices.

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Section: Discussionsupporting

confidence: 92%

Temporal and Spatial Dynamics of Vibrio harveyi: An Environmental Parameter Correlation Investigation in a 4-Metre-Deep Dicentrarchus labrax Aquaculture Tank

Da Fonseca Ferreira,

Roquigny,

Grard

et al. 2024

Microorganisms

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“…Chlorophyll serves as an important predictor of Vibrio abundance ( 103 – 107 ), especially since chlorophyll indicates density of phytoplankton populations and thus serves as an indicator of zooplankton, which feed on phytoplankton ( 6 , 108 ). Since zooplankton feed on phytoplankton, correlation of zooplankton population surges following phytoplankton blooms can be calculated.…”

Section: Discussionmentioning

confidence: 99%

Environmental Factors Influencing Occurrence of Vibrio parahaemolyticus and Vibrio vulnificus

Brumfield

Chen

Gangwar

et al. 2023

Appl Environ Microbiol

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Environmental Drivers of the Divergence of Harveyi Clade Pathogens with Distinctive Virulence Gene Profiles

Barkovskii,

Brown

2024

Microorganisms

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Fish and shellfish pathogens of the Harveyi clade of the Vibrio genus cause significant losses to aquaculture yields and profits, with some of them also causing infections in humans. The present study aimed to evaluate the presence of Harveyi clade fish and shellfish pathogens and their possible diversification in response to environmental drivers in southeastern USA waters. The presence and abundance of potential pathogens were evaluated via the detection and quantitation of six Harveyi-clade-specific virulence genes (toxR, luxR, srp, vhha, vhh, and vhp; VGs) in environmental DNA with clade-specific primers. The environmental DNA was obtained from water and sediments collected from three Georgia (USA) cultured clam and wild oyster grounds. In sediments, the VG concentrations were, on average, three orders of magnitude higher than those in water. The most and least frequently detected VGs were vhp and toxR, respectively. In water, the VGs split into two groups based on their seasonal trends. The first group, composed of luxR, vhp, vhha, and vhh, peaked in August and remained at lower concentrations throughout the duration of the study. The second group, composed of toxR and srp, peaked in June and disappeared between July and December. The first group revealed a high adaptation of their carriers to an increase in temperature, tolerance to a wide range of pH, and a positive correlation with salinity up to 25 ppt. The second group of VGs demonstrated a lower adaptation of their carriers to temperature and negative correlations with pH, salinity, potential water density, conductivity, and dissolved solids but a positive correlation with turbidity. No such trends were observed in sediments. These data reveal the role of VGs in the adaptability of the Harveyi clade pathogens to environmental parameters, causing their diversification and possibly their stratification into different ecological niches due to changes in water temperature, acidity, salinity, and turbidity. This diversification and stratification may lead to further speciation and the emergence of new pathogens of this clade. Our data urge further monitoring of the presence and diversification of Harveyi clade pathogens in a global warming scenario.

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The effect of off-bottom versus on-bottom oyster culture on total and pathogenic Vibrio spp. abundances in oyster tissue, water and sediment samples

Cited by 3 publications

References 34 publications

Temporal and Spatial Dynamics of Vibrio harveyi: An Environmental Parameter Correlation Investigation in a 4-Metre-Deep Dicentrarchus labrax Aquaculture Tank

Temporal and Spatial Dynamics of Vibrio harveyi: An Environmental Parameter Correlation Investigation in a 4-Metre-Deep Dicentrarchus labrax Aquaculture Tank

Environmental Factors Influencing Occurrence of Vibrio parahaemolyticus and Vibrio vulnificus

Environmental Drivers of the Divergence of Harveyi Clade Pathogens with Distinctive Virulence Gene Profiles

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