title: Actinobacillus actinomycetemcomitans isolated from a case of cutaneous botryomycosis.
abstract: Cutaneous botryomycosis is an uncommon chronic suppurative bacterial skin infection that can mimic a fungal infection both clinically and histopathologically. Causative bacteria, most commonly Staphylococcus aureus, aggregate to form characteristic granules. We report the case of a 52-year-old black man who developed cutaneous botryomycosis of the hand following trauma. Routine bacterial cultures grew S aureus and Actinobacillus actinomycetemcomitans, a fastidious gram-negative bacillus known to cause periodontal disease, endocarditis, and actinomycosislike soft tissue infections. Despite culture-proven eradication of S aureus with long-term appropriate antibiotic therapy, the lesion, resolved only after fluoroquinolone treatment directed against A. actinomycetemcomitans, suggesting that A. actinomycetemcomitans was of etiologic significance.
authors.affiliation: Department of Dermatology, Baylor College of Medicine, Houston, TX 77030, USA.
authors.forename: Josie A
authors.initials: JA
authors.lastname: Pielop
authors.forename: Rhea
authors.initials: R
authors.lastname: Phillips
authors.forename: Ted
authors.initials: T
authors.lastname: Rosen
mesh_terms: D000189:Actinobacillus Infections / Q000150:complications* / Q000382:microbiology* / Q000473:pathology; D016976:Aggregatibacter actinomycetemcomitans; D006229:Hand Dermatoses / Q000382:microbiology / Q000473:pathology; D006801:Humans; D008297:Male; D008875:Middle Aged; D017192:Skin Diseases, Bacterial / Q000382:microbiology* / Q000473:pathology; D013207:Staphylococcal Skin Infections / Q000150:complications* / Q000473:pathology; D013211:Staphylococcus aureus / Q000302:isolation & purification*