Bacteria can enter the body through the skin only if what condition is met?

Bacteria can enter the body when the skin's protective barrier is compromised. The skin serves as a primary defense against pathogens, including bacteria. If the skin is damaged, whether due to cuts, abrasions, or infections, it creates an entry point for bacteria to invade the underlying tissues.

An open wound – which is a specific type of skin damage characterized by a break in the skin – significantly increases the risk of bacterial infection, as there is direct access for microorganisms to enter the bloodstream or deeper layers of tissue.

Similarly, when the skin is broken, regardless of the cause, it loses its integrity as a protective layer. This broken state allows bacteria to bypass the skin's defenses, making it easier for infections to develop.

In summary, the presence of damaged skin, open wounds, or any breaks in the skin represents conditions under which bacteria can successfully penetrate the body's defenses, justifying that all listed conditions contribute to the risk of bacterial entry.