21. Mutant strains lacking pili show severely attenuated pathogenicity . 22. Virulence factors are the characteristics that the evolved bacteria have developed to increase pathogenicity . 23. This transglutaminase ability has two implications, one ( in potential pathogenicity ) hypothetical. 24. The pathogenicity ( if any ) of opalines in fish hosts is not yet known. 25. This protein is located in a putative pathogenicity island regulated by the transcription factor MglA. 26. For more information, see the databases at the end of the article or UPEC pathogenicity . 27. Due to its pathogenicity , Machupo virus requires Biosafety Level Four conditions, the highest level. 28. Additionally, regulatory genes outside of the PAI may regulate virulence genes in the pathogenicity island. 29. Regulons can sometimes be pathogenicity islands. 30. T3SSs are essential for the pathogenicity ( the ability to infect ) of many pathogenic bacteria.
