Nocardia brasiliensis is a Gram-positive facultative intracellular bacterium frequently isolated from human actinomycetoma. However, the pathogenesis of this infection remains unknown. Here, we used a model of bacterial delipidation with benzine to investigate the role of N. brasiliensis cell wall-associated lipids in experimental actinomycetoma. Delipidation of N. brasiliensis with benzine res...

Mycetoma/madura foot is a chronic suppurative granulomatous disease characterized by localized subcutaneous swelling with multiple sinus tracts discharging granules. The infection caused by true fungi (eumycetoma) in 40% or filamentous bacteria (actinomycetoma) in 60% of the cases [1]. Actinomycetoma may be due to Actinomadura madurae, Actinomadura peliietieri, Streptomyces somaliensis, Nocardi...

In Mexico, actinomycetoma is mainly caused by Nocardia brasiliensis, which is a soil inhabitant actinobacterium. Here, we report for the first time the draft genome of a strain isolated from a human case that has largely been found in in vitro and experimental models of actinomycetoma, N. brasiliensis HUJEG-1.

Mycetoma is a chronic granulomatous disease, classified into eumycetoma caused by fungi and actinomycetoma due to aerobic filamentous actinomycetes. Mycetoma can be found in geographic areas near the Tropic of Cancer. Mexico is one of the countries in which actinomycetoma is endemic. We report an extraordinary case of an adult male with double eumycetoma caused by Madurella mycetomatis and Fusa...

Mycetoma is a neglected tropical disease caused by fungi (eumycetoma) or bacteria (actinomycetoma), with high morbidity. Gordonia spp. are gram-positive that have previously been reported to cause mycetoma. Here, we report case of soli (initially misidentified as Nocardia spp.) the etiological agent actinomycetoma in 64-year-old patient. After literature search Cochrane Library, LILACS, SciELO,...

Mycetoma is caused by the subcutaneous inoculation of filamentous fungi or aerobic filamentous bacteria that form grains in the tissue. The purpose of this study is to describe the epidemiologic, clinic, laboratory, and therapeutic characteristics of patients with mycetoma at the Oswaldo Cruz Foundation in Rio de Janeiro, Brazil, between 1991 and 2014. Twenty-one cases of mycetoma were included...

Mycetoma are inflammatory pseudotumors, due to infection by bacterial (Actinomycetoma) or fungal (Eumycetoma) agent. A retrospective study was conducted during 34 years. Our aim was to study epidemiologic, clinic, therapeutic and microbiologic characteristics. Eighteen patients were assessed. Sex-ratio H/F was 2. The mean age was 43.6 years. Principal localization was the feet. Our study was ch...

Actinomycetoma is a chronic granulomatous infection, with Nocardia species being one of the infecting pathogens. Infections caused by N. otitidiscaviarum are relatively rare compared with those caused by other Nocardia species. Conventional methods for the diagnosis of nocardiosis based on phenotypic characterization of the strains (e.g., morphology, histopathology) are relatively time consumin...

Foamy cells have been described in various infectious diseases, for example in actinomycetoma induced by Nocardia brasiliensis. These cells are generally considered to be macrophages, although they present dendritic cell (DC)-specific surface markers. In this study, we determined and confirmed the lineage of possible precursors of foamy cells in vitro and in vivo using an experimental actinomyc...