What four factors protect the skin from colonization of most bacteria?

The skin's protective factors against bacterial colonization include its physical barrier, which consists of tightly packed cells that prevent pathogens from penetrating. The presence of antimicrobial peptides produced by skin cells helps to neutralize bacteria. Additionally, the skin's acidic pH and the natural oils it secretes create an unfavorable environment for bacterial growth. Lastly, the skin's microbiome, composed of beneficial bacteria, competes with harmful pathogens for resources and space, further protecting against colonization.