Abstract
Sporotrichosis is the most common implantation mycosis caused by several species of the Sporothrix schenckii complex. The gold standard for diagnosis is concerned with the isolation of the fungus; although, fresh examinations, staining, and biopsies are also helpful for this purpose. The sporotrichin is an antigenic complex comprised of a peptide-rhamnomannan, which is relevant with respect to pathogenic fungi; it is primarily used for serological and skin testing. We present a study regarding the use of sporotrichin as a diagnostic aid for cutaneous sporotrichosis. Furthermore, 138 cases with suspicion of sporotrichosis were included, 55 of which were proven through cultures. Moreover, out of these 55 cases, 52 (94.5%) tested positive for sporotrichin, while the negative cases corresponded to the disseminated cutaneous forms. We observed a sensitivity of 94.5% and a specificity of 95.2%. We consider that the use of sporotrichin as a skin test helps us as an auxiliary diagnosis before a positive sample culture.
Highlights
Sporotrichosis is a subacute, subcutaneous mycosis that is related to the Sporothrix complex, which is primarily represented by Sporothrix schenckii
We aimed to present our experience by employing a sporotrichin skin test from the Universidad
Among the 138 cases with clinical suspicion of sporotrichosis included in this study, 56 recorded positive sporotrichin, and among those 56 cases, 4 (7.1%) were false-positives
Summary
Sporotrichosis is a subacute, subcutaneous mycosis that is related to the Sporothrix complex, which is primarily represented by Sporothrix schenckii (sensu stricto). This infection generally develops after a traumatic inoculation of the fungus. Sporothrix schenckii is a dimorphic fungus (mycelial and yeast forms) that, along with the other species that constitute the complex, generally thrives in temperate and humid climates with an average temperature of. 20–25 ◦ C, in conjunction with high humidity. It has been isolated from soil, plants, decaying plant, wood, and decomposing matter [1,2,4,5,6,7]. After five to seven days of culture medium incubation at 26 ◦ C, the mycelial typical morphology of fine septate hyphae with conidiophores that form sympodially
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