A series of contiguous genes in a pathogenic microorganism including one or more that determines virulence, acquired by horizontal gene transfer.
- The ability of EPEC to adhere to the cells and produce A / E lesions has been attributed to the genes encoded on the pathogenicity island.
- Salmonella can sense bile in the intestine and use it as a signal to downregulate secretion and invasion genes of pathogenicity island.
- Its genetic code is embedded in a complex DNA structure called the TCP pathogenicity island.
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