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…
Human Immunodeficiency Virus Lymphadenitis Definition Lymphadenitis caused by infection with human immunodeficiency virus (HIV). Synonym HIV lymphadenitis. Epidemiology In the 26 years since june 1981, when the first cases of…
Ordinary Bacterial Lymphadenitis Definition Acute, sometimes suppurative lymphadenitis caused by bacterial infection. Pathogenesis Common bacteria, more often Staphylococcus aureus than group A streptococci, may infect the regional lymph nodes draining…
Introduction In a broad sense, bacterial diseases include infections produced by ordinary cocci and bacilli and also by mycobacteria, rickettsiae, and spirochetes. This heterogeneous group of microorganisms can produce tissue…
Measles Lymphadenitis Definition Lymphadenitis caused by infection with measles virus. Etiology Measles virus, a paramyxovirus, produces an acute, highly contagious, exanthematous infection in unimmunized patients. The measles virus does not…
