S V Flórez-Muñoz1, J F Alzate2,3, A C Mesa-Arango4. 1. Grupo de Investigación Dermatológica, Instituto de Investigaciones Médicas, Facultad de Medicina, Universidad de Antioquia, Carrera 51D No. 62-29, Oficina 303, Edificio Manuel Uribe Angel, Medellín, Colombia. 2. Grupo de Parasitología, Facultad de Medicina, Universidad de Antioquia, Medellín, Colombia. 3. Centro Nacional de Secuenciación Genómica, CNSG, Sede de Investigación Universitaria-SIU, Universidad de Antioquia, Medellín, Colombia. 4. Grupo de Investigación Dermatológica, Instituto de Investigaciones Médicas, Facultad de Medicina, Universidad de Antioquia, Carrera 51D No. 62-29, Oficina 303, Edificio Manuel Uribe Angel, Medellín, Colombia. ana.mesa@udea.edu.co.
Abstract
BACKGROUND: Sporotrichosis is a subcutaneous mycosis that affects humans and other animals. Infection prevails in tropical and subtropical countries. Until a few years ago, it was considered that two varieties of Sporothrix schenckii caused this mycosis, but by applying molecular taxonomic markers, it has been demonstrated that there are several cryptic species within S. schenckii complex which varies in susceptibility, virulence, and geographic distribution. OBJECTIVE: This study aimed to identify the clinical isolates of Sporothrix spp. from patients with sporotrichosis in Medellin, Colombia, using two markers and to evaluate the in vitro susceptibility to itraconazole. METHODS: Thirty-four clinical isolates of Sporothrix spp. from Colombia, three from Mexico, and one from Guatemala were identified through sequencing of the noncoding region ITS-1 + 5.8SDNAr + ITS-2 and of the fragment containing exons 3 and 4 of the β-tubulin gene. Clinical isolate sequences were compared with GenBank reference sequences using the BLASTN tool, and then, phylogenetic analysis was performed. Besides, the in vitro susceptibility to itraconazole was evaluated by determining the minimum inhibitory concentrations according to the CLSI M38-A2 method. RESULTS: Clinical isolates were identified by morphology as Sporothrix spp. Using the molecular markers, ITS and β-tubulin, isolates were identified as S. schenckii sensu stricto (25) and Sporothrix globosa (13). Susceptibility to itraconazole was variable among clinical isolates. CONCLUSION: This is the first scientific publication that identifies species that cause sporotrichosis in Colombia, along with the antifungal susceptibility to itraconazole.
BACKGROUND:Sporotrichosis is a subcutaneous mycosis that affects humans and other animals. Infection prevails in tropical and subtropical countries. Until a few years ago, it was considered that two varieties of Sporothrix schenckii caused this mycosis, but by applying molecular taxonomic markers, it has been demonstrated that there are several cryptic species within S. schenckii complex which varies in susceptibility, virulence, and geographic distribution. OBJECTIVE: This study aimed to identify the clinical isolates of Sporothrix spp. from patients with sporotrichosis in Medellin, Colombia, using two markers and to evaluate the in vitro susceptibility to itraconazole. METHODS: Thirty-four clinical isolates of Sporothrix spp. from Colombia, three from Mexico, and one from Guatemala were identified through sequencing of the noncoding region ITS-1 + 5.8SDNAr + ITS-2 and of the fragment containing exons 3 and 4 of the β-tubulin gene. Clinical isolate sequences were compared with GenBank reference sequences using the BLASTN tool, and then, phylogenetic analysis was performed. Besides, the in vitro susceptibility to itraconazole was evaluated by determining the minimum inhibitory concentrations according to the CLSI M38-A2 method. RESULTS: Clinical isolates were identified by morphology as Sporothrix spp. Using the molecular markers, ITS and β-tubulin, isolates were identified as S. schenckii sensu stricto (25) and Sporothrix globosa (13). Susceptibility to itraconazole was variable among clinical isolates. CONCLUSION: This is the first scientific publication that identifies species that cause sporotrichosis in Colombia, along with the antifungal susceptibility to itraconazole.
Authors: Rigoberto Hernández-Castro; Rodolfo Pinto-Almazán; Roberto Arenas; Carlos Daniel Sánchez-Cárdenas; Víctor Manuel Espinosa-Hernández; Karla Yaeko Sierra-Maeda; Esther Conde-Cuevas; Eder R Juárez-Durán; Juan Xicohtencatl-Cortes; Erika Margarita Carrillo-Casas; Jimmy Steven-Velásquez; Erick Martínez-Herrera; Carmen Rodríguez-Cerdeira Journal: J Fungi (Basel) Date: 2022-05-30