Generation of a synthetic binary plasmid that confers resistance to nourseothricin for genetic engineering of Sporothrix schenckii.

Some members of the Sporothrix genus can cause sporotrichosis, a worldwide distributed mycosis that affects several mammalian species, including human beings. Sporothrix schenckii and Sporothrix brasiliensis are the fungal species frequently associated with this disease, and the latter has gained significant interest because of the increased number of cases associated with transmission by cats. Despite the relevance of these organisms in the medical field, limited strategies for their genetic manipulation have been explored. Thus far, gene silencing using the hygromycin B resistance cassette is the sole strategy currently available to study these organisms. Here, we report the generation of a cassette that confers resistance to nourseothricin, which was successfully transferred from Agrobacterium tumefaciens to Sporothrix cells. Therefore, this can be used as a second selective marker to manipulate the genome of these organisms.