In a follow-up on the outbreak linked to contaminated fentanyl in Argentina, the Ministry of Health reports based on information provided by the National Epidemiological Bulletin, as of May 16, 66 cases of infections with the bacteria Klebsiella pneumoniae metallo-beta-lactamase (MBL), extended-spectrum non-beta-lactamase (ESBL), and Ralstonia have been reported due to exposure to contaminated fentanyl produced by the firm HLB Pharma.