D. Girlich et al., Heterogeneity of AmpC cephalosporinases of Hafnia alvei clinical isolates expressing inducible or constitutive ceftazidime resistance phenotypes, ANTIM AG CH, 44(11), 2000, pp. 3220-3223
Ten unrelated Hafnia alvei clinical isolates were grouped according to eith
er their low-level and inducible cephalosporinase production or their high-
level and constitutive cephalosporinase production phenotype. Their AmpC se
quences shared 85 to 100% amino acid identity. The immediate genetic enviro
nment of ampC genes was conserved in H. alvei isolates but was different fr
om that found in other ampC-possessing enterobacterial species.