Linked Life Data

8433897

Source:http://linkedlifedata.com/resource/pubmed/id/8433897

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1993-3-17
pubmed:abstractText
We have previously described two heat-stable enterotoxins (ST) produced by Citrobacter freundii and by Klebsiella pneumoniae. To see whether transfer of toxigenic ability may occur between different bacterial species, conjugal mating experiments were performed using strains isolated from children. Donors and recipients were incubated together. ST production by the recipients was tested by the suckling mouse assay, which is the standard biologic method for detecting ST, and also by an ELISA test. The latter is based on MAb directed to Escherichia coli 18- or 19-amino acid toxin. Citrobacter and E. coli strains producing an ELISA-positive ST were used as plasmid donors. Recipients were E. coli, Klebsiella P89, and Klebsiella AL55. The latter had been previously shown to be capable of producing an ELISA-negative ST, but had spontaneously lost this ability. After conjugation, all strains gave positive results in the suckling mouse assay. However, E. coli and Klebsiella P89 ST were positive in the ELISA test, whereas Klebsiella AL55 ST was negative. The same three strains were transformed by inserting the plasmid pSLM004 encoding an ELISA-positive ST. Klebsiella P89 and E. coli became capable of producing an ELISA-positive ST, whereas Klebsiella AL55 cells were positive in the suckling mouse assay but negative in the ELISA. To assess whether the toxigenicity acquired was itself transmissible, the new ST-producing strains were incubated with a nontoxigenic Citrobacter strain. The latter became capable of producing an ELISA-positive ST in all cases.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0031-3998
pubmed:author
pubmed:issnType
Print
pubmed:volume
33
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
205-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1993
pubmed:articleTitle
Interspecific plasmid transfer and modification of heat-stable enterotoxin expression by Klebsiella pneumoniae from infants with diarrhea.
pubmed:affiliation
Department of Pediatrics, University of Naples, Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't