Tag Michelle S. Hirsch MD PhD

Varicella Zoster

D efinition —Infection by the neurotropic varicella-zoster virus (VZV), an alpha-herpesvirus. Clinical Features Epidemiology Primary VZV infection, commonly known as chickenpox, occurs predominantly in children. Recurrences occur later in life. Severe, recurrent infections can be seen in the setting of…

Necrotizing Fasciitis

D efinition —An aggressive infection of the subcutis and fascia. Clinical Features Epidemiology Commonly seen in the setting of diabetes. Predisposing factors include obesity, hypertension, immune compromise, and history of previous trauma. You’re Reading a Preview Become a Clinical Tree…

Bacillary Angiomatosis

D efinition —An opportunistic infection that commonly occurs in the backdrop of human immunodeficiency virus (HIV)/AIDS infection caused by the organisms Bartonella henselae or Bartonella quintana . Clinical Features Epidemiology This is a rare, opportunistic disease seen in immunocompromised individuals.…

Schistosomiasis

D efinition —Infection by trematodes that belong to the superfamily schistosomatidae ( Schistosoma haematobium , Schistosoma japonicum , and Schistosoma mansoni ). Clinical Features Epidemiology Endemic in Egypt and the Middle East. Genital lesions occur in approximately 5% of patients…

Granuloma Inguinale

D efinition —A sexually transmitted disease, marked by ulceration, caused by the intercellular, gram-negative rod Klebsiella granulomatis . Clinical Features Epidemiology Endemic in tropical and subtropical areas in sexually active adults. Sporadic outbreaks do occur in Western countries. You’re Reading…

Chancroid

D efinition —Infection secondary to infection with Haemophilus ducreyi marked by painful ulcers and adenopathy. Clinical Features Epidemiology Most common in tropical and subtropical developing countries. It is more common in males than females and is commonly seen in the…

Syphilis

PITFALL D efinition —A sexually transmitted disease caused by the spirochete Treponema pallidum . Clinical Features Epidemiology Primary syphilis typically occurs in young, sexually active adults. Secondary and tertiary disease is much less common due to the effectiveness of antibiotic…

Molluscum Contagiosum

D efinition —A viral infection of the skin (often sexually transmitted when involving the genital area) caused by a DNA poxvirus. Clinical Features Epidemiology Genital infection most commonly occurs in young, sexually active individuals. In this population it is commonly…