How does Propionibacterium acnes cause acne in humans?

Overuse of antibiotics can cause bacteria to clog pores in humans.
This type of bacteria is found on the human skin, and it can clog pores.
This type of bacteria often enters a cut and causes an infection in humans.
Close contact with an infected person can lead to acne in humans.

Propionibacterium acnes is a bacteria that naturally resides on human skin. When the balance of this bacteria is disrupted or the bacteria proliferates excessively, it can lead to the formation of acne.

One way in which Propionibacterium acnes causes acne is by triggering inflammation in the hair follicles and sebaceous glands, leading to the formation of pimples, blackheads, and whiteheads.

The bacteria can also produce enzymes that break down sebum (oil) in the skin, leading to the formation of irritating fatty acids that can further contribute to inflammation and acne.

In some cases, Propionibacterium acnes can also play a role in the formation of more severe forms of acne, such as cysts and nodules.

It is not necessarily close contact with an infected person that causes acne, rather it is the natural presence and imbalance of Propionibacterium acnes on the skin that can contribute to acne formation.