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Case Report: Sweet Syndrome in Patients with Sporotrichosis: A 10-Case Series
Ísis Maria Firmino de Lima1, Cláudia Elise Ferraz2,3, Reginaldo Gonçalves de Lima-Neto2,3
11Federal University of Pernambuco, Recife, Brazil.
Abstract:
Human sporotrichosis is an emerging disease caused by fungi of the genus Sporothrix, distributed worldwide, but mostly in tropical and subtropical regions. This disease is caused by traumatic inoculation of contaminated material (either animal or vegetal in origin) into the skin. Sporotrichosis cases caused by zoonotic transmission through felines have significantly increased over the last 20 years in Brazil. There is a spectrum of clinical outcomes, from classical lymphocutaneous and fixed forms to disseminated manifestations and extracutaneous lesions; however, hypersensitivity reactions related to sporotrichosis, including Sweet syndrome (acute febrile neutrophilic dermatoses), are uncommon. In Brazil, Sporothrix brasiliensis is repeatedly associated with feline infection and has consistently shown higher virulence, tendency to escalate to outbreaks or epidemics, and development of atypical forms. Therefore, the objective of the present study was to report the cases of 10 patients with sporotrichosis infected by S. brasiliensis species who developed Sweet syndrome to alert this association, especially in endemic areas.
Insights
Human sporotrichosis, a fungal infection, is increasing, particularly from cats in Brazil. This study highlights an uncommon association between Sporothrix brasiliensis infection and Sweet syndrome, a severe skin reaction.
Area of Science:
- Mycology
- Infectious Diseases
- Dermatology
Background:
- Human sporotrichosis is an emerging globally distributed fungal infection.
- Zoonotic transmission via felines has notably increased in Brazil.
- Sporothrix brasiliensis exhibits higher virulence and atypical presentations.
Purpose of the Study:
- To report cases of sporotrichosis caused by Sporothrix brasiliensis.
- To highlight the uncommon association with Sweet syndrome.
- To alert healthcare professionals in endemic areas.
Main Methods:
- Case series of 10 patients.
- Clinical and etiological investigation of sporotrichosis cases.
- Identification of Sporothrix brasiliensis as the causative agent.
Main Results:
- All 10 patients were infected with Sporothrix brasiliensis.
- All patients developed Sweet syndrome, an uncommon hypersensitivity reaction.
- Sporothrix brasiliensis was linked to feline transmission and severe disease.
Conclusions:
- Sporothrix brasiliensis infection can lead to Sweet syndrome.
- This association is critical for diagnosis and management in endemic regions.
- Increased vigilance for atypical sporotrichosis presentations is necessary.
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