Sporotrichosis is the most common of the deep mycoses. In most cases the transmission occurs secondary to recent penetrating trauma with plant thorns, wood splinters or contaminated organic material. We report a case of a 68-year-old Brazilian female with a small ulcer on her right forefinger and palpable erythematous nodules on her right forearm. These occurred after the bite of a domestic cat that had a lesion on its hind-foot. Since the 1980s, the role of felines in the transmission of this mycosis to humans has gained attention among animal owners, veterinarians, and caretakers. Humans can be contaminated by a cat scratch or bite and even by contact with contaminated solutions. (+info)
Taxonomy and phylogeny of new wood- and soil-inhabiting Sporothrix species in the Ophiostoma stenoceras-Sporothrix schenckii complex.
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Sporothrix, one of the anamorph genera of Ophiostoma, includes the important human pathogen S. schenckii and various fungi associated with insects and sap stain of wood. A survey of fungi from wood utility poles in South Africa yielded two distinct groups of Sporothrix isolates from different geographical areas. DNA sequence and morphological data derived in this study showed that isolates in these groups represent two novel species in the S. schenckii-O. stenoceras species complex. A new species isolated from pine poles and rosebush wood and phylogenetically closely related to S. pallida is described here as Sporothrix stylites. Phylogenetic analyses also confirmed the synonymy of S. albicans and S. nivea with S. pallida. Sporothrix stylites and S. pallida also are related closely to the isolates from soil, previously treated as "environmental" isolates of S. schenckii. Soil isolates are clearly distinct from human isolates of S. schenckii. We describe the former here as Sporothrix humicola. The isolates from eucalypt poles group peripheral to most other species in the S. schenckii-O. stenoceras complex and are newly described as Sporothrix lignivora. Phylogenetic analyses of sequences of isolates from soil and wood together with those of clinical isolates showed that the human-pathogenic strains form an aggregate of several cryptic species. (+info)
Subcutaneous nodules with sporotrichoid spread.
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BACKGROUND: Mycobacterium marinum is an atypical mycobacterium found worldwide and associated with swimming pools and aquariums. Infections typically present with subcutaneous nodules and lymphangitis. CASE REPORT: A 61-year-old female presented with a two-month history of subcutaneous nodules. The patient had a significant recent history that included rose gardening and cleaning her aquarium at home. Biopsy for histology and tissue culture proved the presence of infection with Mycobacterium marinum and the patient was treated with minocycline. The nodules eventually healed and no new lesions appeared after initiation of treatment. CONCLUSION: Mycobacterium marinum is one of many entities that must be considered in a patient with ascending nodules along the lymphatic drainage of an extremity. (+info)
Spontaneous resolution of zoonotic sporotrichosis during pregnancy.
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Molecular characterisation of Sporothrix schenckii isolates from humans and cats involved in the sporotrichosis epidemic in Rio de Janeiro, Brazil.
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Sporotrichosis is a subcutaneous mycosis that is caused by Sporothrix schenckii. Whereas the most common clinical presentation is the lymphocutaneous form, the fixed cutaneous form is not uncommon. Important clues from the clinical history, such as travel and occupation, can help to raise the suspicion of this infection in the differential diagnosis. However, histopathologic and tissue culture, which often require multiple specimens, are necessary to confirm the diagnosis. We present a patient with fixed cutaneous sporotrichosis whose delayed diagnosis led to appreciable scars and morbidity. (+info)