Occurrence of four pathogenic Vibrios in Chinese freshwater fish farms in 2016

Lin, Yan; Pei, Xin; Zhang, Xiuli; Guan, Wenying; Chui, Huixia; Jia, Huayun; Ma, Guozhu; Yang, Shuran; Liu, Ying; Li, Ning; Yang, Dajin

doi:10.1016/j.foodcont.2018.07.043

Cited by 23 publications

(10 citation statements)

References 26 publications

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“…have been extracted from oysters Crassostrea commercialis farmed at estuaries along the east coast of Australia (Siboni et al, 2016). They may have been contaminated by human fecal material, and these differences may also be explained by the halophilism of the four pathogens or their low growth rates in different nutrient conditions (Wong et al, 2019;Yan et al, 2019). Moreover, other two Vibrio species (Vibrio mimicus and Vibrio furnissii) that may have the pathogenic potential for humans were isolated from the seawater in our study (Zhang et al, 2015), and two marine animal pathogens V. harveyi and V. furnissii were also recovered by metabarcoding (Matteucci et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

Spatiotemporal Dynamics of Vibrio Communities and Abundance in Dongshan Bay, South of China

et al. 2020

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The Vibrio genus inhabit estuarine and marine ecosystem throughout the world and can cause severe infections in humans and animals. Previous studies have demonstrated the dynamics of Vibrio at both community and population levels and assessed the close relationship between environmental factors and Vibrio diversity and abundance, such as temperature, salinity, and dissolved oxygen. It is also generally believed that aquaculture is the fastest-growing food sector, which is also applying great environmental impacts on microbial communities in aquatic ecosystems. However, our understanding of the spatiotemporal quantification of Vibrio throughout the four seasons in the aquaculture zone and response to environmental factors remains poor. To explore the spatiotemporal distribution and abundance of the Vibrio community with their related environmental factors and detect the relationships among them, we collected 10 seawater sites spanning four seasons across the whole year in Dongshan Bay for investigating the Vibrio community dynamics. Marked differences in diversity and abundance of the Vibrio community were observed between seasons, which were mainly driven by temperature, dissolved oxygen, nitrate, and nitrite. qPCR analysis showed that Vibrio abundance was most abundant in the summer (5.37 × 106 copies/L), compared with the autumn (4.58 × 106 copies/L), spring (1.18 × 106 copies/L), and winter (1.55 × 104 copies/L). A total of 22 Vibrio operational taxonomic units (OTUs) and 28 species were identified by universal bacteria 16S rRNA gene and cultivation methods, with Vibrio fortis the dominant in these aquaculture areas. To summarize, our present study is one of the few studies to research the occurrence of Vibrio in marine aquaculture of South China, and the results indicate that Vibrio are widely distributed in aquaculture environment and that a further risk assessment is needed to be conducted.

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Section: Discussionmentioning

confidence: 99%

Spatiotemporal Dynamics of Vibrio Communities and Abundance in Dongshan Bay, South of China

et al. 2020

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“…V . cholerae O1 was also isolated from the gills of a freshwater fish [52] and from a Chinese freshwater fish [53]. Fifty-three V .…”

Section: Introductionmentioning

confidence: 99%

Accumulating evidence suggests that some waterbird species are potential vectors of Vibrio cholerae

2019

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Vibrio cholerae is the causative agent of cholera, a life-threatening diarrheal disease. Cholera causes epidemics and pandemics, but the ways this disease spreads worldwide is still unclear. This review highlights a relatively new hypothesis regarding the way V . cholerae can be globally dispersed. Copepods and chironomids are natural reservoirs of V . cholerae and are part of different fish species’ diet. Furthermore, V . cholerae inhabits marine and freshwater fish species. Waterbird species feed on fish or on small invertebrates such as copepods and chironomids. Waterbirds have also been found to carry living copepods and/or chironomids internally or externally from one waterbody to another. All of the above points to the fact that some waterbird species might be vectors of V . cholerae . Indeed, we and others have found evidence for the presence of V . cholerae non-O1 as well as O1 in waterbird cloacal swabs, feces, and intestine samples. Moreover, hand-reared cormorants that were fed on tilapia, a fish that naturally carries V . cholerae , became infected with this bacterial species, demonstrating that V . cholerae can be transferred to cormorants from their fish prey. Great cormorants as well as other waterbird species can cover distances of up to 1,000 km/day and thus may potentially transfer V . cholerae in a short time across and between continents. We hope this review will inspire further studies regarding the understanding of the waterbirds' role in the global dissemination of V . cholerae .

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“…The bacillus is found in coastal areas, where fresh water from rivers mixes with salt water from the sea [1,2,[7][8][9][10]. Contamination frequently occurs via the consumption of water, fish, and other foods containing cholera bacilli [11][12][13]. The disease was introduced to continental Africa in 1970, during the seventh pandemic.…”

Section: Introductionmentioning

confidence: 99%

Volcanic activity controls cholera outbreaks in the East African Rift

et al. 2020

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We hypothesized that Cholera (Vibrio cholerae) that appeared along Lake Kivu in the African Rift in the seventies, might be controlled by volcano-tectonic activity, which, by increasing surface water and groundwater salinity and temperature, may partly rule the water characteristics of Lake Kivu and promote V. cholerae proliferation. Volcanic activity (assessed weekly by the SO 2 flux of Nyiragongo volcano plume over the 2007-2012 period) is highly positively correlated with the water conductivity, salinity and temperature of the Kivu lake. Over the 2007-2012 period, these three parameters were highly positively correlated with the temporal dynamics of cholera cases in the Katana health zone that border the lake. Meteorological variables (air temperature and rainfall), and the other water characteristics (namely pH and dissolved oxygen concentration in lake water) were unrelated to cholera dynamics over the same period. Over the 2016-2018 period, we sampled weekly lake water salinity and conductivity, and twice a month vibrio occurrence in lake water and fish. The abundance of V. cholerae in the lake was positively correlated with lake salinity, temperature, and the number of cholera cases in the population of the Katana health zone. V. cholerae abundance in fishes was positively correlated with V. cholerae abundance in lake water, suggesting that their consumption directly contaminate humans. The activity of the volcano, by controlling the physico-chemical characteristics of Lake Kivu, is therefore a major determinant of the presence of the bacillus in the lake. SO2 fluxes in the volcano plume can be used as a tool to predict epidemic risks.

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Occurrence of four pathogenic Vibrios in Chinese freshwater fish farms in 2016

Cited by 23 publications

References 26 publications

Spatiotemporal Dynamics of Vibrio Communities and Abundance in Dongshan Bay, South of China

Spatiotemporal Dynamics of Vibrio Communities and Abundance in Dongshan Bay, South of China

Accumulating evidence suggests that some waterbird species are potential vectors of Vibrio cholerae

Volcanic activity controls cholera outbreaks in the East African Rift

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