By itself the human body kills bacteria with what?

Question

By itself the human body kills bacteria with what?

Answer 1

Lymphocytes (WBC's) B-cells and T-cells.  Antibodies, plasma and memory cells, chemicals such as Perforin and Interleukin 1 and 2, and Interferon.  It uses also a Complement Protein action, which is a cascade of enzymes that are activated in the presence of an antigen.  

Just to clarify - Interferon kills viruses, not bacteria, but you get my point. lol

Answer 2

[Quick answer:

Internal temperature (pretty humid), acidic stomach, enzymes, antibodies, etc.  Just our skin itself is good at preventing bacteria from getting into our body.]

Answer 3

I hate being pedantic but the Guy above omitted White Blood cells...specifically ones like neutrophil granulocyte responsible for fungi and bacteria.