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. 2007 Sep 4;115(12):1738–1742. doi: 10.1289/ehp.10191
AMPR CIPR CEFR GENR NITR TETR No. of strains
x x 1
x x 1
x x 1
x x 4
x x 2
x x 3
x x 4
x x x 1
x x x 1

R, resistant to that specific antimicrobial.