Title: Highlighting the pathogenic factors of Escherichia coli by testing the hemolytic activity and by detecting the fimbrial adhesins.
Abstract:SUMMARY Escherichiei coli represents the most studied bacterial taxon, but t aking into consideration the high possibilities of adaptation and its capacity of accumulating new plasmid-genophores and b...SUMMARY Escherichiei coli represents the most studied bacterial taxon, but t aking into consideration the high possibilities of adaptation and its capacity of accumulating new plasmid-genophores and bacteriophage elements that can transform, fosterin g the coming into being of new. With high pathogenity, Escherichia coli remains in the center of the scients’ attention. The hemolytic activity is done with the help of som e enzymatic products, being genetically controlled, synthesized by some bacteri a called ‘hemolysins’ and which are included in the category of pathogenic factors of Escherichia coli (R aduc anescu H, Bica Popii V, 1986). At the Escherichia coli strains that are isolated from us, both in the cas e of animals and humans, the β type haemolysis is more frequently observed. Trying to correlate the presence of haemolysis at s ome strains in the presence of termolabile enterotoxin is not eloquent, only 6% of the hemolytic strains from the 20 verified gave a positive result at the test with the ligatur ed ansa for determining the thermolabile toxin. Although signaled as a pathogen factor, the haemolysis is not present at some strains, although they were evidenced as pathogen. Highlighting the fimbrial adhesins at the Escherichia coli strains presents an advantage because of the optimization of the bacter iologic diagnosis, allowing the easy separation of the pathogen Escherichia coli stems from the saprophyte ones.Read More
Publication Year: 2010
Publication Date: 2010-10-29
Language: en
Type: article
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