Propionibacterium acnes-09015848
external image 220px-Propionibacterium_acnes.jpg
Kingdom- Bacteria
Phylum- Actinolbacteria
Order- Actinomycetales
Family- Propionibacteriaceae
Genius- Propionibacterium
Species- P. acne

Propionibacterium acne is a gram positive rod that grows on the skin this occurs because the bacteria secrets lipases on to the skins oily surface and some of it is digested. The digestive products help to inflame the hair folical and swells until it bursts in turn this creates lesion to form and this creates a white head to develope on the skin to create acne.

Colonization occurs in the build up to sexual maturity, this can take a long time to develope before it can be seen. The acne can be found on the face, chest, back, shoulders and can be quite severe at times and come in all shapes and sizes because this can happen there can be scars left after the acne is away these look similar to pot holes in the skin.


There are lots of pathophysiologic features of acne some of which is
  • hyperkeratinization this is when there is a problem with the cells lining the inside of the hair follicle.
  • Sebum production
  • Bacterial proliferation
  • Inflammation

Histopathology of the skin

How common is it?
Acne is more common during teenage years but can still get it in older life, it is said that four out of five teenagers get some sort of acne throughout this period in their life. Also between the ages of 25-40 it is said that one in twenty females and one in one hundred men will get acne, this is called late-onset acne.

Antibiotics are used to treat propionibacterium acne, some of which are clindaycin, erythromycin, tetramycin and metronidazole. majority of these are gels and ointments that would need to be applied at least twice a day.