*Cutibacterium acnes* secretes enzymes that damage the hair follicle, causing inflammatory lesions that may include papules, pustules, nodules, or pseudocysts, depending on their size and severity.

Virulence Factors of *Cutibacterium acnes*

*Cutibacterium acnes* (formerly known as *Propionibacterium acnes*) is a skin bacterium that consumes lipids found in sebum to generate short-chain fatty acids. This metabolic activity is involved in the development of acne.

University of Southern Mississippi

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One of the most ubiquitous skin conditions is acne. Acne afflicts nearly 80% of teenagers and young adults, but it can be found in individuals of all ages. Higher incidence among adolescents is due to hormonal changes that can result in overproduction of sebum. Acne is characterized by whitehead and blackhead comedones that result from clogged hair follicles.

Acne

Sebum is a lipid-rich secretion produced by the sebaceous glands within skin hair follicles. It consists primarily of triacylglycerols, wax esters, and the hydrocarbon squalene, serving as a protective barrier against moisture loss and as a nutrient source for skin microbiota.

Sebum

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

OpenStax Microbiology Textbook

Comedomes (white heads, black heads, papules, pustules, nodules. or psuedocysts). 

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