169 | Microbiological resistance and clinical ineffectiveness: an investigation into amoxicillin and amoxicillin/clavulanate efficacy in real-world populations: Pierangela Irrera1, Gabriella Frattima1, Fabiola De Luca1, Anna Paola Capra1, Michela Campolo1, Alessio Ardizzone2, Emanuela Esposito1 | 1Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Italy; 2UniCamillus-Saint Camillus International University of Health Sciences, Rome, Italy. J Biol Res [Internet]. 2026 Mar. 31 [cited 2026 Apr. 17];99(s1). Available from: https://www.pagepressjournals.org/jbr/article/view/15421