Comparisons Between Bacterial Pathogens and Related Nonpathogenic Strains Have Revealed

Comparisons between bacterial pathogens and related nonpathogenic strains have revealed

A) additional genes in the pathogen that are associated with virulence.
B) a reduced numbers of genes in the pathogen that force it to adopt a parasitic lifestyle.
C) additional genes in the pathogen that free it from a parasitic lifestyle.
D) loss of genes in the pathogen that normally allow detection by the host's immune system.

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