S ≤ 0, 25 mg/ L и R > 0, 5 mg/ L Enterobacteriaceae S ≤ 1( ^) mg/ L и R > 2 mg/ L (^) Тигециклин има понижена in vitro активност срещу Proteus, Providencia и Morganella spp.
S ≤ 0, 25 mg/ l in R > 0, 5 mg/ l Enterobacteriaceae S ≤ 1 (^) mg/ l in R > 2 mg/ l () ^ Tigeciklin ima zmanjšano aktivnost in vitro proti družinam Proteus, Providencia in Morganella spp.