Extended Data Fig. 9: Antibiotic resistance profiles of K. pneumoniae in contact mice matches antibiotic resistance profile of K. pneumoniae administered to index mice.

a, Fecal K. penumoniae burden in samples from neonatal contact mice before and after cohousing with K. penumoniae OXA-48 (resistant to azithromycin and ampicillin and sensitive to kanamycin) colonized index mice (n=6,7 animals) (a). b,c Fecal K. penumoniae burden in samples from adult contact mice before and after cohousing with K. penumoniae OXA-48 colonized index mice (n=6,7 animals) (b) or K. penumoniae ST258 (resistant to kanamycin and ampicillin and sensitive to gentamycin) colonized index mice (n=6,7 animals) (c). Culture media was supplemented with kanamycin, ampicillin, gentamycin and azithromycin were indicated (at 50 μg/mL). ND is none detected (the limit of detection for K. pneumoniae in feces = 103 CFU/g), horizontal lines indicate mean values.