title: Botryomycosis.
abstract: A case of botryomycosis was studied in which a coagulase-negative, DNAsenegative Staphylococcus with wide antibiotic sensitivity in vitro was isolated and which could be classified as having a 'low pathogenic capacity'. Nevertheless, there was no improvement with appropriate therapy. IgG and complement (C3) were demonstrated in the grains. Botryomycosis can be considered as a state of 'equilibrium' between the host and the microorganism. It is not clear if this results from low pathogenicity of the organism or from some peculiar characteristic of the host.
mesh_terms: D000328:Adult; D003176:Complement C3; D003937:Diagnosis, Differential; D005528:Foot; D006801:Humans; D007074:Immunoglobulin G; D008297:Male; D008271:Mycetoma / Q000175:diagnosis; D012867:Skin / Q000473:pathology; D012874:Skin Diseases, Infectious / Q000276:immunology / Q000382:microbiology / Q000473:pathology; D013203:Staphylococcal Infections / Q000276:immunology / Q000382:microbiology / Q000473:pathology
chemical_list: D003176:Complement C3; D007074:Immunoglobulin G