Sarcoptes scabiei (Scabies)




Sarcoptes scabiei (Scabies)

Integumentary system

Pigmented skin disorders



Acneiform skin disorders

Acne vulgaris



Hidradenitis suppurativa

Papulosquamous and inflammatory skin disorders

Contact dermatitis

Atopic dermatitis

Lichen planus

Pityriasis rosea


Seborrhoeic dermatitis


Keratotic skin disorders

Actinic keratosis

Vesiculobullous skin disorders

Epidermolysis bullosa

Bullous pemphigoid

Pemphigus vulgaris

Desquamating skin disorders

Erythema multiforme

Stevens-Johnson syndrome

Skin integrity disorders

Pressure ulcer




Skin infections




Necrotizing fasciitis

Human papillomavirus

Varicella zoster virus

Poxvirus (Smallpox and Molluscum contagiosum)


Herpes simplex virus


Malassezia (Tinea versicolor and Seborrhoeic dermatitis)

Pediculus humanus and Phthirus pubis (Lice)

Sarcoptes scabiei (Scabies)

Human herpesvirus 6 (Roseola)

Parvovirus B19

Varicella zoster virus

Measles virus

Rubella virus

Skin neoplasms

Vascular tumors

Human herpesvirus 8 (Kaposi sarcoma)


Skin cancer

Hair and nail disorders

Alopecia areata

Telogen effluvium


Integumentary system pathology review

Pigmentation skin disorders: Pathology review

Acneiform skin disorders: Pathology review

Papulosquamous and inflammatory skin disorders: Pathology review

Vesiculobullous and desquamating skin disorders: Pathology review

Skin cancer: Pathology review

Bacterial and viral skin infections: Pathology review

Viral exanthems of childhood: Pathology review


Sarcoptes scabiei (Scabies)


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USMLE® Step 1 questions

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High Yield Notes

5 pages


Sarcoptes scabiei (Scabies)

of complete


USMLE® Step 1 style questions USMLE

of complete

A 37-year-old man presents to an outpatient clinic for evaluation of pruritus and skin lesions. The symptoms developed five weeks ago and have progressively worsened. The symptoms are diffuse but most prominent in the upper extremities. The patient frequently wakes up at night due to itching and has difficulty falling asleep again. Past medical history is notable for inflammatory bowel disease and hypertension. The patient worked as a fisherman but lost his job a year ago. Since then, he has been residing in a homeless shelter. His temperature is 37.2˚C (99.0˚F), pulse is 92/min, and blood pressure is 147/85 mmHg. The heart and lungs are clear to auscultation. Abdominal examination is unremarkable. Examination of the patient’s hands is shown below. Which of the following best describes the pathophysiology of this patient’s condition?

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External References

First Aid



Scabies p. 161, 200


Scabies is a highly contagious skin infection caused by the mite Sarcoptes scabiei. Scabies is spread through close physical contact with an infected person or by sharing clothing or bedding. Symptoms of scabies include severe itchiness and a pimple-like rash. Occasionally tiny burrows may be seen in the skin. These symptoms can be present across most of the body or just in certain areas such as the wrists, between fingers, or along the waistline. The itch is often worse at night. Treatment includes topical permethrin and oral ivermectin. Benzyl benzoate application is an alternative. It's also important to treat all close contacts, and to wash all clothing, bedding, and towels used by the infected person in hot water.


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