“…The donated milk is often contaminated with pathogenic microorganisms, such as Escherichia coli and Staphylococcus aureus , which are related to neonatal sepsis, meningitis, necrotizing enterocolitis, and diarrheal diseases (Charlier, Cretenet, Even, & Le Loir, ; Zaidi, Thaver, Ali, & Khan, ); wherefore, studies about microbiological contamination of human milk are increasing (Civardi et al, ; Fernández et al, ; Ikonen, Miettinen, & Grönroos, ; Keim et al, ; Perrin, Fogleman, Newburg, & Allen, ). Nakamura et al () investigated an outbreak caused by contamination of human milk in a neonatal intensive care unit and identified that the causative agent was an E. coli resistant to several antibiotics. This outbreak had a serious impact because many newborns were infected and one death occurred.…”