Bacteriophage are quite selective for their prey. “To enter a host cell, bacteriophages attach to specific receptors on the surface of bacteria, including lipo

Bacteriophage are quite selective for their prey. “To enter a host cell, bacteriophages attach to specific receptors on the surface of bacteria, including lipopolysaccharides, teichoic acids, proteins, or even flagella. This specificity means a bacteriophage can infect only certain bacteria bearing receptors to which they can bind, which in turn determines the phage's host range. Host growth conditions also influence the ability of the phage to attach and invade them.” from Wikipedia