In many cases, the virulence of otherwise harmless bacteria has been enhanced dr

Question

In many cases, the virulence of otherwise harmless bacteria has been enhanced dramatically by the acquisition of genes by horizontal transfer. Which of the following are traits that can be acquired by horizontal gene transfer? There is more than one correct choice, please select all that apply to receive credit.

1. Shiga toxin (exotoxin) in E. coli O157:H7 2. The O-antigen of E. coli O157:H7 3. Cholera toxin in Vibrio cholerae 4. Psychrotolerance in Listeria monocytogenes 5. Lipid A in Salmonella enterica serovar typhimurium

Explanation / Answer

Options 1,3 4 and 5 are the traits that are acquired by horizontal gene transfer. Option 2 is as a result of lateral gene transfer.

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