Article Abstract:
Bacteriocin typing of the plant pathogen Burkholderia (Pseudomonas) solanacearum race 1 isolates indicate that spontaneous bacteriocin resistant mutants are resistant to other bacteriocins. The production of bacteriocins is high in infected plants and is related to genomic variation of the pathogen. The bacteriocin-resistant mutants grow better than isogenic nonmutants in the presence of bacteriocins. The pathogen is characterized using bacteriocin typing, pulsed gel electrophoresis and polymerase chain reaction techniques.
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Article Abstract:
Two methods used in the phage typing of Listeria food isolates of the US Food and Drug Admnistration are compared. This involves the conventional method which determines the phage type by employing a log-phase growth microbial lawn on agar and the reversed phage typing procedure wherein innoculation of preprepared plates with log-phase cells of the culture are madeprior to testing. Both methods were found to be similarly effective.
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Article Abstract:
The evaluation of the protective aspect of the methyltransferase gene as a tool for typing Helicobacter pylori isolates is discussed. Results suggest that genomic methylation status is useful as a typing tool due to the sufficiently high methyltransferase diversity.
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