TABLE 3.

Categorization of 245 invasive Haemophilus influenzae isolates (Norway 2017–2021) into rPBP3 genotypes based on amino acid substitutions in positions 385, 389, 517, and 526 compared to reference strain Rd KW20 (Fleischmann et al., 1995).

Level	sPBP3	Low	Low	High-	High-	High +	High +
Stage	0	1	1	2	2	3	3
Group	–	I	II	III-like(−)	III(−)	III-like(+)	III(+)
S385T	–	–	–	+	+	+	+
L389F	–	–	–	–	–	+	+
R517H	–	+	–	+	–	+	–
N526K	–	–	+	–	+	–	+
Number	215	2	27	0	0	0	1
%	87.8	0.8	11.0	0	0	0	0.4