Elsevier, International Journal of Medical Microbiology, 6(290), p. 519-527, 2000
DOI: 10.1016/s1438-4221(00)80017-x
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Horizontal gene transfer plays a key role in the generation of novel bacterial pathogens. Besides plasmids and bacteriophages, large genomic regions termed pathogenicity islands (PAIs) can be transferred horizontally. All three mechanisms for DNA exchange or transfer may be important for the evolution of bacterial pathogens.