{Reference Type}: Journal Article {Title}: Fungal Infections in the ICU during the COVID-19 Pandemic in Mexico. {Author}: Roman-Montes CM;Bojorges-Aguilar S;Corral-Herrera EA;Rangel-Cordero A;Díaz-Lomelí P;Cervantes-Sanchez A;Martinez-Guerra BA;Rajme-López S;Tamez-Torres KM;Martínez-Gamboa RA;González-Lara MF;Ponce-de-Leon A;Sifuentes-Osornio J; {Journal}: J Fungi (Basel) {Volume}: 9 {Issue}: 5 {Year}: 2023 May 18 {Factor}: 5.724 {DOI}: 10.3390/jof9050583 {Abstract}: Background: Invasive Fungal Infections (IFI) are emergent complications of COVID-19. In this study, we aim to describe the prevalence, related factors, and outcomes of IFI in critical COVID-19 patients. Methods: We conducted a nested case-control study of all COVID-19 patients in the intensive care unit (ICU) who developed any IFI and matched age and sex controls for comparison (1:1) to evaluate IFI-related factors. Descriptive and comparative analyses were made, and the risk factors for IFI were compared versus controls. Results: We found an overall IFI prevalence of 9.3% in COVID-19 patients in the ICU, 5.6% in COVID-19-associated pulmonary aspergillosis (CAPA), and 2.5% in invasive candidiasis (IC). IFI patients had higher SOFA scores, increased frequency of vasopressor use, myocardial injury, and more empirical antibiotic use. CAPA was classified as possible in 68% and 32% as probable by ECMM/ISHAM consensus criteria, and 57.5% of mortality was found. Candidemia was more frequent for C. parapsilosis Fluconazole resistant outbreak early in the pandemic, with a mortality of 28%. Factors related to IFI in multivariable analysis were SOFA score > 2 (aOR 5.1, 95% CI 1.5-16.8, p = 0.007) and empiric antibiotics for COVID-19 (aOR 30, 95% CI 10.2-87.6, p = <0.01). Conclusions: We found a 9.3% prevalence of IFIs in critically ill patients with COVID-19 in a single center in Mexico; factors related to IFI were associated with higher SOFA scores and empiric antibiotic use for COVID-19. CAPA is the most frequent type of IFI. We did not find a mortality difference.