For viral predators of bacteria, sensitivity can be contagio
Is bacterial sensitivity contagious? Scientists show for the first time how bacteria that are entirely resistant to a bacteriophage, or bacterial virus, can become susceptible to it after spending time with other susceptible, or sensitive, bacteria. This form of phage invasion into resistant cells could have a major impact on the transfer of antibiotic resistance and virulence genes among bacteria.

Bacteriophages (phages) are probably the most abundant entities in nature, often exceeding bacterial densities by an order of magnitude. As viral predators of bacteria, phages have a major impact on bacterial communities by reducing some bacteria and enabling others to flourish. Phages also occasionally package host DNA and deliver it to other bacteria, in a process known as horizontal gene transfer (HGT)....

http://www.medicalnewstoday.com/releases/315235.php
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