Bacteriophage: It is a type of virus that infects bacteria. The word "bacteriophage" literally means "bacteria eater," because bacteriophages destroy their host cells
When phages infect a new bacterium, it has the potential to introduce the DNA of the original host bacterium.
This can introduce genes that may be harmful to humans.
It can enable antibiotic resistance and cause Parkinson's disease and obesity.
These include diphtheria, botulism, Staphylococcus aureus infections (i.e. skin and pulmonary infections, food poisoning, and toxic shock syndrome), Streptococcus infections, Pasteurella infections, and cholera, Shiga toxin-producing Shigella and Escherichia coli infections, and Pseudomonas aeruginosa infections.