Saccharomycodes ludwigii is a yeast species best known for being a contaminant in alcohol and fruit juice production.[1] It is highly resistant to typical environmental stressors such as high temperature, high sugar concentration, and high sulfur dioxide concentration.[2] It is often referred to as the "winemaker's nightmare," as it contaminates products by outcompeting desirable yeast species.[3] However, S. ludwigii strains are currently being tested in the growing low-alcohol beer industry.[4]