HIV-1 is the most common and pathogenic strain of the virus.

Protein K is a porin expressed in some pathogenic strains of E. coli bacteria.

The bacterium, which has 250 pathogenic strains, causes leptospirosis, the most common disease transmitted from animals to humans.

This is widely used in characterizing new species of bacteria, and is useful for identifying pathogenic strains.

But that was a high pathogenic strain.

This high level of antibiotic resistance has prompted concerns that Bacteroides species may become a reservoir for resistance in other, more highly pathogenic bacterial strains.

Similar to the other pathogenic strains, there are signs of loss of function mutations.

That flu had a low pathogenic strain, meaning it caused a mild illness in the chickens.

Certain pathogenic strains of F. oxysporum could be released to infect and control invasive weed species.

Chemoprophylaxis is commonly used to those close contacts who are at highest risk of carrying the pathogenic strains.