Isolate/ Origin Espécie Virulence phenotypes Aspect mucoid Capsular serotype Aerobactin production Hemolytic Lecithinase activity P1/A K. oxytoca Absent -a Negative Negative Negative P2/A K. oxytoca Absent - Negative Negative Negative P3/A K. oxytoca Absent - Negative Negative Negative P4/A K. oxytoca Absent - Negative Negative Negative P5/A K. oxytoca Absent - Negative Negative Negative P6/A K. pneumoniae Weak NDb Negative Negative Negative P7/A K. pneumoniae Weak ND Negative Negative Negative P8/A K. pneumoniae Weak ND Negative Negative Negative P9/A K. oxytoca Absent - Negative Negative Negative P11/A K. pneumoniae Weak ND Negative Negative Negative P13/A K. pneumoniae Moderate K5 Negative Negative Negative P14/A K. pneumoniae Weak ND Negative Negative Negative P15/A K. pneumoniae Weak ND Negative Negative Negative P17/A K. pneumoniae Weak ND Negative Negative Negative U1/B K. pneumoniae Moderate K5 Negative Negative Negative U2/B K. pneumoniae Weak ND Negative Negative Negative U3/B K. pneumoniae Moderate ND Negative Negative Negative U4/B K. pneumoniae Intense K5 Negative Negative Negative U5/B K. pneumoniae Weak K4 Negative Negative Negative U7/B K. pneumoniae Absent ND Negative Negative Negative U8/B K. pneumoniae Moderate K5 Negative Negative Negative A= Hospital A B= Hospital B ND= not serotyped b= undetermined serotype, serotype K6 up

Table 2: Virulence phenotypes of Klebsiella isolates from modular enteral diets, originating from two public hospitals