Indole decreases the virulence of pathogenic vibrios belonging to the Harveyi clade

2021 ◽  
Author(s):  
Shanshan Zhang ◽  
Qian Yang ◽  
Tom Defoirdt
Keyword(s):  
Pathogenic Vibrios

scholarly journals Relationships between Environmental Factors and Pathogenic Vibrios in the Northern Gulf of Mexico

2010 ◽  
Vol 76 (21) ◽  
pp. 7076-7084 ◽  
Author(s):  
C. N. Johnson ◽  
A. R. Flowers ◽  
N. F. Noriea ◽  
A. M. Zimmerman ◽  
J. C. Bowers ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Water Column ◽  
Vibrio Vulnificus ◽  
Environmental Parameters ◽  
Sampling Period ◽  
Pathogenicity Factor ◽  
Hemolysin Gene ◽  
Thermostable Direct Hemolysin ◽  
Pathogenic Vibrios ◽  
Abundance And Distribution

ABSTRACT Although autochthonous vibrio densities are known to be influenced by water temperature and salinity, little is understood about other environmental factors associated with their abundance and distribution. Densities of culturable Vibrio vulnificus containing vvh (V. vulnificus hemolysin gene) and V. parahaemolyticus containing tlh (thermolabile hemolysin gene, ubiquitous in V. parahaemolyticus), tdh (thermostable direct hemolysin gene, V. parahaemolyticus pathogenicity factor), and trh (tdh-related hemolysin gene, V. parahaemolyticus pathogenicity factor) were measured in coastal waters of Mississippi and Alabama. Over a 19-month sampling period, vibrio densities in water, oysters, and sediment varied significantly with sea surface temperature (SST). On average, tdh-to-tlh ratios were significantly higher than trh-to-tlh ratios in water and oysters but not in sediment. Although tlh densities were lower than vvh densities in water and in oysters, the opposite was true in sediment. Regression analysis indicated that SST had a significant association with vvh and tlh densities in water and oysters, while salinity was significantly related to vibrio densities in the water column. Chlorophyll a levels in the water were correlated significantly with vvh in sediment and oysters and with pathogenic V. parahaemolyticus (tdh and trh) in the water column. Furthermore, turbidity was a significant predictor of V. parahaemolyticus density in all sample types (water, oyster, and sediment), and its role in predicting the risk of V. parahaemolyticus illness may be more important than previously realized. This study identified (i) culturable vibrios in winter sediment samples, (ii) niche-based differences in the abundance of vibrios, and (iii) predictive signatures resulting from correlations between environmental parameters and vibrio densities.

scholarly journals Antiadhesive activity of poly-hydroxy butyrate biopolymer from a marine Brevibacterium casei MSI04 against shrimp pathogenic vibrios

2014 ◽  
Vol 13 (1) ◽  
Author(s):  
George Seghal Kiran ◽  
Anuj Nishanth Lipton ◽  
Sethu Priyadharshini ◽  
Kumar Anitha ◽  
Lucia Elizabeth Cruz Suárez ◽  
...  
Keyword(s):  
Pathogenic Vibrios

Evaluation of Thiosulfate-Citrate-Bile Salts-Sucrose Agar, a Selective Medium for the Isolation of Vibrio cholerae and Other Pathogenic Vibrios

1974 ◽  
Vol 129 (5) ◽  
pp. 497-500 ◽  
Author(s):  
W. M. McCormack ◽  
W. E. DeWitt ◽  
P. E. Bailey ◽  
G. K. Morris ◽  
P. Soeharjono ◽  
...  
Keyword(s):  
Vibrio Cholerae ◽  
Bile Salts ◽  
Selective Medium ◽  
Pathogenic Vibrios

Distribution of pathogenic vibrios and Vibrio spp. in the water column and sediment samples from the southern Gulf of Mexico

2021 ◽  
Vol 173 ◽  
pp. 113116
Author(s):  
Johanna Bernáldez-Sarabia ◽  
Marcial L. Lizárraga-Partida ◽  
Edna L. Hernández-López ◽  
Jahaziel Gasperin-Bulbarela ◽  
Alexei F. Licea-Navarro ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Water Column ◽  
Sediment Samples ◽  
Southern Gulf Of Mexico ◽  
Pathogenic Vibrios ◽  
Vibrio Spp

Inhibitory effect of benthic diatom species on three aquaculture pathogenic vibrios

2017 ◽  
Vol 27 ◽  
pp. 131-139 ◽  
Author(s):  
Ceres A. Molina-Cárdenas ◽  
M. del Pilar Sánchez-Saavedra
Keyword(s):  
Inhibitory Effect ◽  
Benthic Diatom ◽  
Diatom Species ◽  
Pathogenic Vibrios

Comparative study between probiotic bacterium Arthrobacter XE-7 and chloramphenicol on protection of Penaeus chinensis post-larvae from pathogenic vibrios

Aquaculture ◽  
2006 ◽  
Vol 253 (1-4) ◽  
pp. 140-147 ◽  
Author(s):  
Jiqiu Li ◽  
Beiping Tan ◽  
Kangsen Mai ◽  
Qinghui Ai ◽  
Wenbing Zhang ◽  
...  
Keyword(s):  
Comparative Study ◽  
Probiotic Bacterium ◽  
Penaeus Chinensis ◽  
Pathogenic Vibrios

scholarly journals Monitoring of fish-pathogenic vibrios

2007 ◽  
Vol 73 (2) ◽  
pp. 310-312
Author(s):  
TOMOO SAWABE ◽  
YOUHEI FUKUI
Keyword(s):  
Pathogenic Vibrios

Inhibition of shrimp pathogenic vibrios by a marine Pseudomonas I-2 strain

Aquaculture ◽  
2002 ◽  
Vol 208 (1-2) ◽  
pp. 1-10 ◽  
Author(s):  
R. Chythanya ◽  
Indrani Karunasagar ◽  
Iddya Karunasagar
Keyword(s):  
Pathogenic Vibrios

scholarly journals Contribution of Vibrio parahaemolyticus Virulence Factors to Cytotoxicity, Enterotoxicity, and Lethality in Mice

2010 ◽  
Vol 78 (4) ◽  
pp. 1772-1780 ◽  
Author(s):  
Hirotaka Hiyoshi ◽  
Toshio Kodama ◽  
Tetsuya Iida ◽  
Takeshi Honda
Keyword(s):  
Cell Lines ◽  
Virulence Factors ◽  
Vibrio Parahaemolyticus ◽  
Biological Activities ◽  
Infection Model ◽  
Cytotoxic Activities ◽  
Mutant Strains ◽  
Thermostable Direct Hemolysin ◽  
Clinical Illness ◽  
Pathogenic Vibrios

ABSTRACT Vibrio parahaemolyticus, one of the human-pathogenic vibrios, causes three major types of clinical illness: gastroenteritis, wound infections, and septicemia. Thermostable direct hemolysin (TDH) secreted by this bacterium has been considered a major virulence factor of gastroenteritis because it has biological activities, including cytotoxic and enterotoxic activities. Previous reports revealed that V. parahaemolyticus strain RIMD2210633, which contains tdh, has two sets of type III secretion system (T3SS) genes on chromosomes 1 and 2 (T3SS1 and T3SS2, respectively) and that T3SS1 is responsible for cytotoxicity and T3SS2 is involved in enterotoxicity, as well as in cytotoxic activity. However, the relative importance and contributions of TDH and the two T3SSs to V. parahaemolyticus pathogenicity are not well understood. In this study, we constructed mutant strains with nonfunctional T3SSs from the V. parahaemolyticus strain containing tdh, and then the pathogenicities of the wild-type and mutant strains were evaluated by assessing their cytotoxic activities against HeLa, Caco-2, and RAW 264 cells, their enterotoxic activities in rabbit ileal loops, and their lethality in a murine infection model. We demonstrated that T3SS1 was involved in cytotoxic activities against all cell lines used in this study, while T3SS2 and TDH had cytotoxic effects on a limited number of cell lines. T3SS2 was the major contributor to V. parahaemolyticus-induced enterotoxicity. Interestingly, we found that both T3SS1 and TDH played a significant role in lethal activity in a murine infection model. Our findings provide new indications that these virulence factors contribute to and orchestrate each distinct aspect of the pathogenicity of V. parahaemolyticus.

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