Seasonal distribution of total and pathogenic Vibrio parahaemolyticus in Chesapeake Bay oysters and waters

Parveen, Salina; Hettiarachchi, K.; Bowers, John C.; Jones, Jessica; Tamplin, Mark L.; McKay, Rusty; Beatty, William S.; Brohawn, Kathy; DaSilva, Ligia V.; DePaola, Angelo

doi:10.1016/j.ijfoodmicro.2008.09.019

Cited by 168 publications

(191 citation statements)

References 28 publications

Supporting

Mentioning

137

Contrasting

Unclassified

Order By: Relevance

“…Audemard et al 43 suggested that unexplored postharvest processing (PHP) methods to eliminate V. vulnifi cus from oysters, which use relaying to high salinity waters, could be an alternative strategy, considering that high salinities appear to negatively affect the survival of V. vulnifi cus. However, this study observed a negative correlation between salinity and V. parahaemolyticus, whereas no correlation was observed between salinity and V. vulnifi cus; this result is consistent with results obtained in other studies conducted in shellfi sh cultivation areas off the Brazilian coast 32,35 and in other parts of the world 41,44 . Although the V. parahaemolyticus and V. vulnifi cus counts observed in the waters can be considered as low, it is important to note that in fi ltering shellfi sh such as oysters and mussels, these microorganisms are concentrated in their guts and in other tissues, with levels reaching up to 10 6 bacteria per gram of shellfi sh…”

Section: Parahaemolyticus Infections In the Pacifi C Northwest Andsupporting

confidence: 92%

Occurrence of potentially pathogenic Vibrio in oysters (Crassostrea gigas) and waters from bivalve mollusk cultivations in the South Bay of Santa Catarina

Ramos

Miotto

et al. 2014

Rev. Soc. Bras. Med. Trop.

View full text Add to dashboard Cite

Introduction:This research aimed to identify and quantify potentially pathogenic Vibrio from different cultivations of bivalve shellfi sh in the State of Santa Catarina, Brazil, and water regions in the South Bay, as well as correlate the incidence of these microorganisms with the physicochemical parameters of marine waters. Methods: Between October 2008 and March 2009, 60 oyster and seawater samples were collected from six regions of bivalve mollusk cultivation, and these samples were submitted for Vibrio counts. Results: Twenty-nine (48.3%) oyster samples were revealed to be contaminated with one or more Vibrio species. The Vibrio parahaemolyticus and Vibrio vulnifi cus counts in the samples ranged from < 0.5 log 10 Most Probable Number (MPN) g -1 to 2.3 log 10 MPN g -1 oyster and from < 0.5 log 10 MPN g -1 to 2.1 log 10 MPN g -1 oyster, respectively. Of the 60 seawater samples analyzed, 44 (73.3%) showed signs of contamination with one or more vibrio species. The counts of V. parahaemolyticus and V. vulnifi cus in the samples ranged from < 0.3 log 10 MPN·100mL -1 to 1.7 log 10 MPN·100mL -1 seawater and from < 0.3 log 10 MPN·100mL -1 to 2.0 log 10 MPN·100mL -1 seawater, respectively. A positive correlation between V. vulnifi cus counts and the seawater temperature as well as a negative correlation between the V. parahaemolyticus counts and salinity were observed. Conclusions:The results suggest the need to implement strategies to prevent vibrio diseases from being transmitted by the consumption of contaminated bivalve shellfi sh.

show abstract

Section: Parahaemolyticus Infections In the Pacifi C Northwest Andsupporting

confidence: 92%

Occurrence of potentially pathogenic Vibrio in oysters (Crassostrea gigas) and waters from bivalve mollusk cultivations in the South Bay of Santa Catarina

Ramos

Miotto

et al. 2014

Rev. Soc. Bras. Med. Trop.

View full text Add to dashboard Cite

show abstract

“…The lowest abundance was observed in July (winter), when water and air temperature were lower, with values of 12 S in I2 and 10 S in C2 (Figure 2). This is in accordance with the results of previous studies (DePaola et al, 2003;Parveen et al, 2008), which reported higher bacterial quantities in environments with a higher water temperature.…”

Section: Discussionsupporting

confidence: 94%

Microbiological quality and bacterial diversity of the tropical oyster Crassostrea rhizophorae in a monitored farming system and from natural stocks

et al. 2015

View full text Add to dashboard Cite

ABSTRACT. Microbiological evaluation is one of the most important parameters for analyzing the viability of an oyster farming system, which addresses public health and ecological concerns. Here, the microbiological quality of the oyster Crassostrea rhizophorae cultivated in a monitored environment and from natural beds in Bahia, northeastern Brazil, was determined. Bacterial diversity in oysters was measured by polymerase chain reaction-denaturing gradient gel electrophoresis. Sequence analysis revealed that most bacterial species showed similarity with uncultured or unidentified bacteria from environmental samples, and were clustered into the phylum Proteobacteria. Diverse bacteria from cultivated (monitored) oyster samples were grouped in the same cluster with a high similarity (2015) index (above 79%). Microbiological analyses revealed that these oysters did not contain pathogens. These results reflect the natural balance of the microbial communities essential to the maintenance of health and in inhibiting pathogen colonization in the oyster. On the other hand, bacterial diversity of samples from native stocks in extractive areas displayed a similarity index varying between 55 and 77%, and all samples were clustered separately from each other and from the cluster of samples derived from the cultivation area. Microbiological analyses showed that oysters from the extractive area were not fit for human consumption. This reflected a different composition of the microbial community in this area, probably resulting from anthropic impact. Our study also demonstrated that low temperatures and high rainfall limits the bacterial concentration in tropical oysters. This is the first study analyzing the total bacterial community profiles of the oyster C. rhizophorae.

show abstract

“…The present study also demonstrated that the infection rate of V. parahaemolyticus was much higher in summer months, suggesting that warm and humid climate is probably more suitable for the growth of V. parahaemolyticus. The relationship between temperature and V. parahaemolyticus density has been previously documented (23), with a significant positive association being observed between V. parahaemolyticus counts and water temperature or turbidity (24,25). In fact, V. parahaemolyticus counts in water showed a stronger correlation with turbidity during summer.…”

Section: Discussionmentioning

confidence: 78%

Analysis of Bacterial Pathogens Causing Acute Diarrhea on the Basis of Sentinel Surveillance in Shanghai, China, 2006–2011

Zhang¹,

Zhao²,

Ding³

et al. 2014

Jpn J Infect Dis

View full text Add to dashboard Cite

SUMMARY: Acute diarrhea is the most common infectious disease worldwide and its causes vary from one region to another. We aimed to analyze the spectrum and epidemiological characteristics of pathogens from 22,386 outpatients with acute diarrhea on the basis of surveillance data from Shanghai, China, during 2006-2011. The following 8 pathogens were isolated and identified using standard methods: Salmonella, Shigella, Vibrio cholerae, V. parahaemolyticus, enteropathogenic Escherichia coli, enterotoxigenic E. coli, enteroinvasive E. coli, and enterohemorrhagic E. coli. In total, 2,234 strains of pathogens were obtained and the overall isolation rate of these 8 pathogens gradually decreased from 17.1z in 2006 to 7.4z in 2011. V. parahaemolyticus was the most frequently identified pathogen, followed by Shigella and Salmonella. The isolation rate of V. parahaemolyticus notably varied by season, whereas Salmonella and Shigella infections showed little seasonal variation. Age-related variation was also observed. V. parahaemolyticus infection occurred more often in patients aged 20-40 years. S. enterica serovar Enteritidis and S. flexneri were the most common serotypes of Salmonella and Shigella, respectively. The descending trend observed in the isolation rate of pathogens from the current surveillance suggests an urgent requirement or improvement.

show abstract

Seasonal distribution of total and pathogenic Vibrio parahaemolyticus in Chesapeake Bay oysters and waters

Cited by 168 publications

References 28 publications

Occurrence of potentially pathogenic Vibrio in oysters (Crassostrea gigas) and waters from bivalve mollusk cultivations in the South Bay of Santa Catarina

Occurrence of potentially pathogenic Vibrio in oysters (Crassostrea gigas) and waters from bivalve mollusk cultivations in the South Bay of Santa Catarina

Microbiological quality and bacterial diversity of the tropical oyster Crassostrea rhizophorae in a monitored farming system and from natural stocks

Analysis of Bacterial Pathogens Causing Acute Diarrhea on the Basis of Sentinel Surveillance in Shanghai, China, 2006–2011

Contact Info

Product

Resources

About