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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
2005-1-12
pubmed:abstractText
A total of 1500 environmental strains of Vibrio parahaemolyticus, isolated from the aquatic environment of Bangladesh, were screened for the presence of a major V. parahaemolyticus virulence factor, the thermostable direct haemolysin (tdh) gene, by the colony blot hybridization method using a digoxigenin-labeled tdh gene probe. Of 1500 strains, 5 carried the tdh sequence, which was further confirmed by PCR using primers specific for the tdh gene. Examination by PCR confirmed that the 5 strains were V. parahaemolyticus and lacked the thermostable direct haemolysin-related haemolysin (trh) gene, the alternative major virulence gene known to be absent in pandemic strains. All 5 strains gave positive Kanagawa phenomenon reaction with characteristic beta-haemolysis on Wagatsuma agar medium. Southern blot analysis of the HindIII-digested chromosomal DNA demonstrated, in all 5 strains, the presence of 2 tdh genes common to strains positive for Kanagawa phenomenon. However, the 5 strains were found to belong to 3 different serotypes (O3:K29, O4:K37, and O3:K6). The 2 with pandemic serotype O3:K6 gave positive results in group-specific PCR and ORF8 PCR assays, characteristics unique to the pandemic clone. Clonal variations among the 5 isolates were analyzed by comparing RAPD and ribotyping patterns. Results showed different patterns for the 3 serotypes, but the pattern was identical among the O3:K6 strains. This is the first report on the isolation of pandemic O3:K6 strains of V. parahaemolyticus from the aquatic environment of Bangladesh.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0008-4166
pubmed:author
pubmed:issnType
Print
pubmed:volume
50
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
827-34
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed-meshheading:15644897-Bacterial Toxins, pubmed-meshheading:15644897-Bangladesh, pubmed-meshheading:15644897-Blotting, Southern, pubmed-meshheading:15644897-DNA, Bacterial, pubmed-meshheading:15644897-DNA Fingerprinting, pubmed-meshheading:15644897-Gene Dosage, pubmed-meshheading:15644897-Genes, Bacterial, pubmed-meshheading:15644897-Hemolysin Proteins, pubmed-meshheading:15644897-Molecular Epidemiology, pubmed-meshheading:15644897-Nucleic Acid Hybridization, pubmed-meshheading:15644897-Open Reading Frames, pubmed-meshheading:15644897-Polymerase Chain Reaction, pubmed-meshheading:15644897-Random Amplified Polymorphic DNA Technique, pubmed-meshheading:15644897-Ribotyping, pubmed-meshheading:15644897-Serotyping, pubmed-meshheading:15644897-Vibrio parahaemolyticus, pubmed-meshheading:15644897-Water Microbiology
pubmed:year
2004
pubmed:articleTitle
Pandemic strains of O3:K6 Vibrio parahaemolyticus in the aquatic environment of Bangladesh.
pubmed:affiliation
International Centre for Diarrhoeal Disease Research, Bangladesh, GPO 128, Dhaka 1000, Bangladesh. sislam@icddrb.org
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't