RESUMO
Dermabacter hominis species is constituted by Gram positive facultative anaerobic coryneform rods being part of the resident microbiota human skin, and exceptionally associated to infections in immunocompromised or severely debilitated patients. An immunocompetent young adult woman with a neck sebaceous cyst infected by D. hominis as unique etiologic agent is presented. Phenotypic identification of the causative agent was achieved through simple tests, based on the originally scheme proposed by Funke and Bernard, and feasible to be performed in a hospital Microbiology Laboratory. Phenotypic characteristics as coccoid morphology, the acrid/spermatic odor, esculin hydrolysis, the production of pyrrolidonyl-arylamidase, lysine and ornithine decarboxylase, are key tests to identify D. hominis. The matrix-asisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) confirmed the phenotypic identification.
Assuntos
Abscesso/microbiologia , Infecções por Actinomycetales/microbiologia , Cisto Epidérmico/microbiologia , Micrococcaceae/isolamento & purificação , Abscesso/etiologia , Abscesso/cirurgia , Infecções por Actinomycetales/etiologia , Infecções por Actinomycetales/cirurgia , Proteínas de Bactérias/análise , Técnicas de Tipagem Bacteriana , Drenagem , Farmacorresistência Bacteriana Múltipla , Cisto Epidérmico/complicações , Feminino , Humanos , Imunocompetência , Micrococcaceae/efeitos dos fármacos , Micrococcaceae/enzimologia , Pessoa de Meia-IdadeRESUMO
A healthy 20-year-old woman with myopia had uneventful bilateral laser in situ keratomileusis after which the uncorrected visual acuity was 20/20 in the right eye and 20/30 in the left eye. Fifteen days later, a stromal paraxial lesion was found in the right eye with a corresponding loss of visual acuity, pain, and photophobia. The flap was lifted and the infiltrate scraped for smears. Cultures showed that Rhodococcus globerulus was the infectious agent. Intensive topical antibiotic treatment was applied with good visual results.