Is Propionibacterium acnes catalase positive or negative?

Propionibacterium acnes Infection P. acnes is a gram-positive commensal bacterium that causes acne on the skin.

Are acne bacteria anaerobic?

The anaerobic bacterium Propionibacterium acnes is believed to play an important role in the pathophysiology of the common skin disease acne vulgaris.

What causes P. acnes bacteria?

Too much sebum, however, clogs your follicles (aka pores), so they can’t shed dead skin cells and replace them with new ones. The combination of dead skin cells and excess sebum provides a feast for a type of bacteria that lives on your skin, known as Propionibacterium acnes (P acnes, for short).

What is P. acnes infection?

Propionibacterium acnes (P. acnes) is a gram-positive anaerobic bacillus commonly isolated from the flora of the face, chest, and axilla region. It has emerged as a major pathogen responsible for postoperative shoulder infections after both arthroscopy and arthroplasty procedures.

What is the most common disease caused by Propionibacterium?

Affiliations. Propionibacterium acnes is a gram-positive human skin commensal that prefers anaerobic growth conditions and is involved in the pathogenesis of acne (Kirschbaum and Kligman, 1963). Acne is one of the most common skin diseases, affecting more than 45 million individuals in the United States.

What color is Propionibacterium acnes?

Background/purpose: Red fluorescence of the face induced by ultraviolet light is thought to be due to Propionibacterium acnes. However, recently there are reports correlating this red fluorescence with the amount of facial sebum secretion.

How do I stop P acne?

There are many things a person can do to prevent pimples and other forms of acne, including:

1. Wash the face twice daily.
2. Refrain from harsh scrubbing.
3. Keep hair clean.
4. Refrain from popping or picking at pimples.
5. Apply topical treatments.
6. Consider topical retinoids.
7. Talk to a dermatologist about antibiotics.

What bacteria kills acne?

Benzoyl peroxide. This ingredient kills the bacteria that cause acne, helps remove excess oil from the skin and removes dead skin cells, which can clog pores. OTC benzoyl peroxide products are available in strengths from 2.5 to 10 percent.

What kills Cutibacterium acnes?

For example, Benzoyl peroxide kills Cutibacterium acnes. This medication helps remove excess oils from the skin, as well as dead skin cells that clog pores, which is often a treatment for acne.

How do you treat Propionibacterium acne?

Antibiotics used to treat anaerobic infections usually suffice for other types of Cutibacterium infections. C acnes is generally highly susceptible to a wide range of antibiotics. These include the penicillins, carbapenems, and clindamycin. In addition, vancomycin and teicoplanin have been used.

How do you get rid of Propionibacterium?

Most cases of acne vulgaris are controlled with combinations of oral or topical vitamin A derivatives, topical benzoyl peroxide, oral or topical antibiotics, and topical beta-hydroxy acids such as salicylic acid.

What kills Propionibacterium acnes?

A number of factors cause acne, but the primary agents are bacteria called Propionibacterium acnes, or PA. Topical treatments containing benzoyl peroxide are commonly used to kill the bacteria.

Why is a positive triglyceride hydrolysis test expected?

A positive triglyceride hydrolysis test is expected for P. acnes because it feeds on sebum (oil) in clogged seba-ceous glands. Etiologic agent of gastric ulcers, Heliobacter pylori? Why would this activity be advantageous in this environment?

How are hydrolysis tests similar to other tests?

Name a nonfermentative test in which gas production indicates a positive test result. The catalase test yields oxygen gas as a positive result. The tests for hydrolysis of starch, casein, and triglycerides are similar in terms of setup… how do the methods for the detection of hydrolysis differ between these three tests?

Why do I need a positive urea hydrolysis test?

A positive urea hydrolysis test would be expected for H. pylori because one of the byproducts of this reaction, ammonia, will neutralize harmful stomach acid and allow the bacterium to survive in this hostile environment and cause infection. What test do Kilger’s iron agar and SIM medium have in common?

How is the ASTM used in hydrolysis testing?

Hydrolysis Testing Methods. The ASTM is an active test in which the sample material undergoes stringent testing after being in the chamber for 15 days. The result of this test is pass / fail. There is no associated equivalency with years in the field. The Mitchell Group uses the ASTM to test the hydrolytic stability of its Sta-Kleen products.

A positive urea hydrolysis test would be expected for H. pylori because one of the byproducts of this reaction, ammonia, will neutralize harmful stomach acid and allow the bacterium to survive in this hostile environment and cause infection. What test do Kilger’s iron agar and SIM medium have in common?

A positive triglyceride hydrolysis test is expected for P. acnes because it feeds on sebum (oil) in clogged seba-ceous glands. Etiologic agent of gastric ulcers, Heliobacter pylori? Why would this activity be advantageous in this environment?

Name a nonfermentative test in which gas production indicates a positive test result. The catalase test yields oxygen gas as a positive result. The tests for hydrolysis of starch, casein, and triglycerides are similar in terms of setup… how do the methods for the detection of hydrolysis differ between these three tests?