Table 4.

β-Lactamases produced by 104 penicillinase-producingP. mirabilis strains

pI (n)ASPCR position 39ASPCR promoterβ-Lactamase(s) (promoter), n
GlnLysP3Pa + Pb
Low level (n = 23)
 5.4 (21)++TEM-1 (P3), 20
++TEM-1 (Pa + Pb), 1
 5.7 (1)NDa NDCARB-2 (PSE-1), 1
 7.7 (1)NDNDNDNDSHV-1, 1
Intermediate level (n = 28)
 5.4 (21)++TEM-1 (P3), 15
++TEM-1 (Pa + Pb), 6
 5.6 (3)++TEM-2 (Pa + Pb), 3
 5.4 + 5.6 (3)+++TEM-1 (Pa + Pb) + TEM-2 (Pa + Pb), 1
++++TEM-1 (P3) + TEM-2 (Pa + Pb), 2
 5.7 (1)NDNDCARB-2 (PSE-1), 1
High level (n = 53)
 5.4 (19)++TEM-1 (Pa + Pb), 17
+++TEM-1 (P3) + TEM-1 (Pa + Pb), 1
++TEM-1 (P4), 1
 5.6 (21)++TEM-2 (Pa + Pb), 19
++TEM-2 (P4), 1
+TEM-2 (deletion + G162→T), 1
 5.4 + 5.6 (12)++++TEM-1 (P3) + TEM-2 (Pa + Pb), 10
+++TEM-1 (Pa + Pb) + TEM-2 (Pa + Pb), 2
 7.7 (1)NDNDNDNDSHV-1, 1
  • a ND, not determined.