Table 3. PBP3 mutation profiles of β-lactamase-non-producing β-lactam-resistant Haemophilus influenzae

Ann Clin Microbiol 2025;28(4):23. Prevalence and molecular characteristics of β-lactam resistance in non-typeable Haemophilus influenzae isolates in Korea

Table 3. PBP3 mutation profiles of β-lactamase-non-producing β-lactam-resistant Haemophilus influenzae

Resistance profile	Isolates (n = 16)	TEM	ftsI allele	Amino acid substitutions
Resistance profile	Isolates (n = 16)	TEM	ftsI allele	D350	S357	M377	S385	L389	I449	A502	R517	N526
AM	2	–	40	N	N	I	T	F				K
AM, AMC, CXM, FEP	1	–	NEW	N	N		T					K
AM, CXM, FEP	1	–	NEW	N	N		T					K
AM, CXM	1	–	NEW	N	N		T					K
AM, CXM	2	–	26	N	N	I	T	F			H
CXM	2	–	26	N	N	I	T	F			H
CXM	4	–	40	N	N	I	T	F				K
CXM	1	–	16	N	N	I	T	F		T		K
CXM	1	–	16-like	N	N	I	T	F		T		K
CXM	1	–	370			I	T	F			H

Abbreviations: AM, ampicillin; AMC, amoxicillin-clavulanate; CXM, cefuroxime; FEP, cefepime.