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Infectious Disease - Acne Vulgaris
FUNDAMENTAL DESCRIPTION
Acne vulgaris is a persistent inflammatory condition of the sebaceous follicles, which are specialized pilosebaceous units.
EPIDEMIOLOGY • Acne vulgaris is among the most prevalent dermatological conditions, impacting about 85% of individuals at some point from age 15 to the 40s. • The average age of onset is 24. • It constitutes up to 2 million outpatient consultations for patients aged 15–19 years.
RISK FACTORS • A known risk factor is the hyperresponsiveness of sebaceous cells and keratinocytes to androgenic hormones. • Androgenic hormones likely play a role in the setting of puberty and women with raised levels of testosterone, dehydroepiandrosterone sulphate, or androstenedione.
GENERAL PREVENTION • Refrain from extensive exposure to skin irritants. • Upholding fundamental hygienic standards.
PATHOPHYSIOLOGY
Inflammatory alterations affecting the sebaceous follicles result in the buildup of lipid-rich sebum and bacterial proliferation.
· CAUSES
Propionibacterium acnes is an anaerobic, Gram-positive bacterium that inhabits the androgen-stimulated sebaceous follicle and is a typical component of the cutaneous microbiota. Typically characterized by a minimal bacterial load.
• Sebaceous follicles secrete sebum, a lipid-rich product from sebaceous glands that serves as a nutrient-rich medium for P. acnes. • The initial catalyst seems to be an overproliferation of P. acnes, leading to inflammation, follicular rupture, and the propagation of the inflammatory response into the adjacent dermis. This culminates in the development of papules, pustules, and nodules.
DIAGNOSTIC HISTORY
• Characterized by the existence of closed (whitehead) or open (blackhead) comedones. • In more severe instances, comedones may experience inflammatory alterations, potentially resulting in painful nodules, pustules, or cellulitis.
• Confined to regions of the body with the highest concentration of sebaceous glands: face, neck, chest, upper back, and upper arms.
PHYSICAL EXAM
· • A variety of features may be observed, ranging from noninflamed comedones (either open or closed) to active nodules and/or pustules.
• The presence of scarring typically signifies a more severe form of acne vulgaris. • Based on the location and intensity of inflammation, acne can be categorized as mild, moderate, or severe.
– Mild often encompasses noninflammatory comedones.
- Moderate presents with a heightened quantity of inflammatory pustules and papules impacting a broader skin surface area.
Severe acne is characterized by big, painful nodules and may result in scar formation.
THERAPY
• Contingent upon the degree of acne. Topical treatment can be effective for mild to moderate acne.
The primary components of treatment consist of antibacterial medicines, anti-inflammatory medications, and retinoids for the differentiation of follicular keratinocytes.
· PHARMACEUTICALS
Retinoids
• Retinoids diminish the size and secretion of sebaceous glands. • Topical treatments are most efficacious in preventing additional comedone formation.
• Certain topical retinoids, including tazarotene, may induce significant irritation.
• In cases of severe acne, particularly when scarring is anticipated, systemic retinoid therapy with oral isotretinoin is recommended.
Isotretinoin has demonstrated anti-inflammatory properties and suppresses the proliferation of P. acnes, contributing to its efficacy.
• Typical adverse effects of oral retinoids Isotretinoin may cause birth abnormalities and hypertriglyceridemia. Young women should get counseling regarding the utilization of two contraceptive methods while undergoing oral retinoid treatment.
Connections between isotretinoin and depression/suicide have been documented.
Antimicrobials
• Specified whether an inflammatory component is observed.
Benzoyl peroxide is an effective first-line bactericidal agent having a rapid onset of action.
The incorporation of topical antimicrobials is efficacious when utilized alongside benzoyl peroxide or retinoids.
Topical antimicrobials utilized in isolation often result in elevated resistance levels and treatment failure.
• In cases of severe acne, oral antimicrobials are warranted. • Frequently utilized medications exhibiting efficacy against P. acnes encompass tetracyclines (minocycline, tetracycline, doxycycline), bactrim, erythromycin, and clindamycin. • An increase in resistance has been seen, with over 50% of P. acnes exhibiting complete resistance to at least one antimicrobial agent. The predominant resistance is shown in the following order: erythromycin, followed by clindamycin, and then tetracycline.
Patient education and medication adherence are essential, and drug resistance must be taken into account in a deteriorating patient.
• An additional reason of clinical failure is the proliferation of Gram-negative bacteria.
Gram-negative bacteria.
· Considerations During Pregnancy
Oral isotretinoin is strongly teratogenic.
· SUPPLEMENTARY THERAPY
Supplementary Treatments
In the context of hyperandrogenism, medicines like spironolactone are effective in inhibiting the excessive development of androgen-sensitive sebaceous glands.
• Oral contraceptives have been demonstrated to decrease the incidence of acne. • For significant inflammatory alterations, intralesional corticosteroid administration may be employed.
· COMPLEMENTARY AND ALTERNATIVE THERAPIES
The roles of chemical and physical microabrasion and laser treatment remain undefined.
FUNDAMENTAL DESCRIPTION
Acne vulgaris is a persistent inflammatory condition of the sebaceous follicles, which are specialized pilosebaceous units.
EPIDEMIOLOGY • Acne vulgaris is among the most prevalent dermatological conditions, impacting about 85% of individuals at some point from age 15 to the 40s. • The average age of onset is 24. • It constitutes up to 2 million outpatient consultations for patients aged 15–19 years.
RISK FACTORS • A known risk factor is the hyperresponsiveness of sebaceous cells and keratinocytes to androgenic hormones. • Androgenic hormones likely play a role in the setting of puberty and women with raised levels of testosterone, dehydroepiandrosterone sulphate, or androstenedione.
GENERAL PREVENTION • Refrain from extensive exposure to skin irritants. • Upholding fundamental hygienic standards.
PATHOPHYSIOLOGY
Inflammatory alterations affecting the sebaceous follicles result in the buildup of lipid-rich sebum and bacterial proliferation.
· CAUSES
Propionibacterium acnes is an anaerobic, Gram-positive bacterium that inhabits the androgen-stimulated sebaceous follicle and is a typical component of the cutaneous microbiota. Typically characterized by a minimal bacterial load.
• Sebaceous follicles secrete sebum, a lipid-rich product from sebaceous glands that serves as a nutrient-rich medium for P. acnes. • The initial catalyst seems to be an overproliferation of P. acnes, leading to inflammation, follicular rupture, and the propagation of the inflammatory response into the adjacent dermis. This culminates in the development of papules, pustules, and nodules.
DIAGNOSTIC HISTORY
• Characterized by the existence of closed (whitehead) or open (blackhead) comedones. • In more severe instances, comedones may experience inflammatory alterations, potentially resulting in painful nodules, pustules, or cellulitis.
• Confined to regions of the body with the highest concentration of sebaceous glands: face, neck, chest, upper back, and upper arms.
PHYSICAL EXAM
· • A variety of features may be observed, ranging from noninflamed comedones (either open or closed) to active nodules and/or pustules.
• The presence of scarring typically signifies a more severe form of acne vulgaris. • Based on the location and intensity of inflammation, acne can be categorized as mild, moderate, or severe.
– Mild often encompasses noninflammatory comedones.
- Moderate presents with a heightened quantity of inflammatory pustules and papules impacting a broader skin surface area.
Severe acne is characterized by big, painful nodules and may result in scar formation.
THERAPY
• Contingent upon the degree of acne. Topical treatment can be effective for mild to moderate acne.
The primary components of treatment consist of antibacterial medicines, anti-inflammatory medications, and retinoids for the differentiation of follicular keratinocytes.
· PHARMACEUTICALS
Retinoids
• Retinoids diminish the size and secretion of sebaceous glands. • Topical treatments are most efficacious in preventing additional comedone formation.
• Certain topical retinoids, including tazarotene, may induce significant irritation.
• In cases of severe acne, particularly when scarring is anticipated, systemic retinoid therapy with oral isotretinoin is recommended.
Isotretinoin has demonstrated anti-inflammatory properties and suppresses the proliferation of P. acnes, contributing to its efficacy.
• Typical adverse effects of oral retinoids Isotretinoin may cause birth abnormalities and hypertriglyceridemia. Young women should get counseling regarding the utilization of two contraceptive methods while undergoing oral retinoid treatment.
Connections between isotretinoin and depression/suicide have been documented.
Antimicrobials
• Specified whether an inflammatory component is observed.
Benzoyl peroxide is an effective first-line bactericidal agent having a rapid onset of action.
The incorporation of topical antimicrobials is efficacious when utilized alongside benzoyl peroxide or retinoids.
Topical antimicrobials utilized in isolation often result in elevated resistance levels and treatment failure.
• In cases of severe acne, oral antimicrobials are warranted. • Frequently utilized medications exhibiting efficacy against P. acnes encompass tetracyclines (minocycline, tetracycline, doxycycline), bactrim, erythromycin, and clindamycin. • An increase in resistance has been seen, with over 50% of P. acnes exhibiting complete resistance to at least one antimicrobial agent. The predominant resistance is shown in the following order: erythromycin, followed by clindamycin, and then tetracycline.
Patient education and medication adherence are essential, and drug resistance must be taken into account in a deteriorating patient.
• An additional reason of clinical failure is the proliferation of Gram-negative bacteria.
Gram-negative bacteria.
· Considerations During Pregnancy
Oral isotretinoin is strongly teratogenic.
· SUPPLEMENTARY THERAPY
Supplementary Treatments
In the context of hyperandrogenism, medicines like spironolactone are effective in inhibiting the excessive development of androgen-sensitive sebaceous glands.
• Oral contraceptives have been demonstrated to decrease the incidence of acne. • For significant inflammatory alterations, intralesional corticosteroid administration may be employed.
· COMPLEMENTARY AND ALTERNATIVE THERAPIES
The roles of chemical and physical microabrasion and laser treatment remain undefined.
