Table 2. BLI susceptibility phenotypes for inhibitor resistance-assigned alleles.

Allele	Piperacillin-tazobactam (R/n, %R)	Amoxicillin-clavulanic acid (R/n, %R)	Mutation/s
Exact matches to known alleles assigned as inhibitor resistant
SHV-52	0/12 (100%)	0/9 (100%)	35Q, 69I
SHV-107	–	2/2 (100%)	235A
Other alleles with mutations at Ambler site 69, 130, 234 or 235
SHV-2 +130G	1/1 (100%)	1/1 (100%)	130G, 238S
SHV-27* +69I	0/1 (0%)	0/1 (0%)	69I
SHV-27* +69L	0/2 (0%)	0/2 (0%)	69L
SHV-27* +130R	0/1 (0%)	0/1 (0%)	130R
SHV-110* +69I	1/1 (100%)	1/1 (100%)	35Q, 69I, 156D
SHV-164* +69I	0/1 (0%)	0/1 (0%)	69I
SHV-187* +69L†	0/2 (0%)	0/1 (0%)	69L
SHV-209* +69I	2/2 (100%)	1/1 (100%)	35Q, 69I
Exact matches to alleles reported in the literature as inhibitor resistant but assigned here as WT
SHV-26	13/63 (20.6%)	10/59 (16.9%)	–

Novel alleles identified in this study have been highlighted with an ‘*’.

†SHV-187* +69L is SHV-132 in Kleborate v2.4.1.