What Happened
Health officials across Tennessee are tracking a sharp increase in cases involving Candida auris, a multidrug-resistant yeast that can cause severe and often fatal infections. The Tennessee Department of Health reports a 45% year-over-year increase in clinical cases for the first quarter of 2026 compared to the same period last year, with over 500 patient cases identified since intensified tracking began in 2022.
The fungus spreads easily in healthcare environments through contaminated surfaces and person-to-person contact. It is particularly insidious because it can colonize a patient's skin without causing symptoms, allowing for silent transmission within facilities. The mortality rate for invasive infections is high, estimated between 30% and 60%, largely due to drug resistance and patients' underlying health conditions.
Who Is at Risk and State Response
The primary at-risk groups are patients with prolonged stays in hospitals or nursing homes, those with invasive medical devices like breathing tubes or catheters, individuals with weakened immune systems, and people who have recently received broad-spectrum antibiotics or antifungals. 'This isn't a pathogen that the general public encounters at the grocery store,' said Dr. Michelle Fiscus, Chief Medical Officer for the TDH. 'The risk is almost exclusively inside healthcare facilities.'
In response, the Tennessee Department of Health has issued advisories emphasizing enhanced infection control. Protocols include strict contact precautions, thorough environmental cleaning with specific disinfectants, and proactive screening of high-risk patients. The fungus shows resistance to multiple antifungal drug classes, including fluconazole, with growing concerns about resistance to amphotericin B and echinocandins, which are the current first-line treatments.
Broader Context and Spread
The Tennessee outbreak is part of a national trend. The U.S. Centers for Disease Control and Prevention (CDC) categorizes C. auris as an 'urgent antimicrobial resistance threat,' with U.S. clinical cases rising from 476 in 2019 to over 2,300 in 2023. While initial Tennessee clusters were concentrated in metropolitan areas like Nashville and Memphis, confirmed cases have now been identified in multiple regions, including Knoxville and Chattanooga.
First identified globally in 2009 and in the U.S. in 2016, C. auris represents a persistent public health challenge due to its simultaneous emergence on multiple continents and its ability to survive on surfaces for weeks. The primary public health goals are containing outbreaks in healthcare settings and preserving the effectiveness of the limited number of antifungal medications available.