Mycobacterium Leprae Lymphadenitis Definition Lymphadenitis caused by infection with Mycobacterium leprae. Epidemiology About 5.5 million people are estimated to have leprosy around the world, with the majority of cases occurring…
Introduction In the population at large, mycotic infections are generally restricted to the skin; however, in persons debilitated by chronic disease, treated for long periods with broad-spectrum antibiotics, or immunosuppressed…
Nontuberculous Mycobacterial Lymphadenitis A. Atypical Mycobacterial Lymphadenitides Definition Lymphadenitides caused by nontuberculous mycobacteria. Synonym Nontuberculous mycobacterial lymphadenitides. Etiology A variety of mycobacteria, referred to as nontuberculous or atypical, are widely…
Mycobacterium Tuberculosis Lymphadenitis Definition Lymphadenitis caused by infection with Mycobacterium tuberculosis. Synonym Tuberculous lymphadenitis. Epidemiology Tuberculosis was for centuries one of the most severe human diseases and, although its incidence…
Introduction Mycobacteria are aerobic, non–spore-forming, nonmotile gram-positive bacilli that are essentially defined by their distinctive acid-fast staining property (1). Owing to their thick, lipid-rich cell walls, mycobacteria are relatively impermeable…
Lymphadenitis of Whipple Disease Definition Lymphadenitis caused by infection with the bacterium Tropheryma whipplei. Epidemiology The incidence of Whipple disease is low (1). Only 1,000 cases were reported by 1987…
Syphilitic Lymphadenitis Definition Lymphadenitis in the course of syphilis caused by infection with Treponema pallidum. Synonym Luetic lymphadenitis. Epidemiology The epidemiology of syphilis has radically changed with time. After high…
Lymphogranuloma Venereum Lymphadenitis Definition Lymphadenitis caused by the sexually transmitted bacterium Chlamydia trachomatis. Synonym Nicolas-Favre disease. Epidemiology Formerly, in Western countries, lymphogranuloma venereum (LGV) caused by Chlamydia trachomatis serovar L1–L3…
Bacillary Angiomatosis of Lymph Nodes Definition Tumor-like proliferations of small blood vessels caused by infection with Bartonella henselae. Synonym Epithelioid angiomatosis. Epidemiology Bacillary angiomatosis (BA) has been described primarily in…
Cat-Scratch Lymphadenitis Definition Necrotizing granulomatous lymphadenitis caused by Bartonella henselae. A cat scratch, bite, or lick introduces the bacteria at the site of cutaneous inoculation, causing a self-limited infection, the…
