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. 1999 May;43(5):1252–1255. doi: 10.1128/aac.43.5.1252

TABLE 1.

Classification based on PBP 2X sequence differences and properties of S. pneumoniae strains

Group Strain Serotype MIC (μg/ml)a
Amino acid motifb
PCR resultc
PC CTX CPDX CDTR CFDN CCL S T M K A H S S N V L K S G T pbp1a pbp2b
None 1/E9 15 0.031 0.031 0.125 0.016 0.125 1 –––– –––––– –––––
2/HSB1 15 0.031 0.031 0.125 0.031 0.125 2 –––– V––––– –––––
3/YO42 3 0.031 0.063 0.125 0.031 0.125 1 –––– –––––– –––––
4/HSC21 6 0.031 0.063 0.125 0.031 0.25 1 –––– –––––– –––––
5/H48 19 0.031 0.063 0.125 0.031 0.25 1 –––– –––––– –––––
I 6/HSB5 3 0.008 0.125 0.5 0.031 0.25 2 –––– –––––– ––––A
7/T37 6 0.008 0.125 0.25 0.031 0.25 2 –––– –––––– ––––A
8/TJ24 9 0.016 0.125 0.25 0.031 0.25 1 –––– –––––– ––––A
9/E13 9 0.016 0.25 0.5 0.031 0.25 2 –––– –––––– ––––A
II 14/TO22 19 0.031 0.063 0.25 0.063 0.125 0.5 –––– –L–––– V––––
17/SU1 19 0.063 0.125 0.25 0.016 0.25 1 –––– –L–––– V––––
21/H3 10 0.031 0.125 0.25 0.063 0.125 1 –––– –L–––– –––––
16/MA37 23 0.063 0.125 0.25 0.125 0.25 1 –––– VL–––– –––––
22/H23 14 0.031 0.063 0.25 0.063 0.25 1 –––– VL–––– –––––
III 11/KM99 3 0.031 0.125 0.5 0.063 0.25 0.5 –A–– –––––– –––––
15/HSC9 3 0.031 0.125 0.5 0.125 0.25 1 –A–– –––––– –––––
18/TJ41 3 0.031 0.125 0.5 0.063 0.25 2 –A–– –––––– –––––
23/H69 3 0.031 0.25 0.25 0.063 0.25 1 –A–– –––––– –––––
25/S19 3 0.031 0.125 0.5 0.125 0.25 1 –A–– –––––– –––––
IV 34/H31 6 1 0.5 1 0.5 4 32 –A–– –––––– V–––– + +
36/Z21 6 2 0.5 2 0.5 8 64 –A–– –––––– V–––– + +
37/H28 19 1 0.5 2 0.5 2 64 –A–– –––––– V–––– + +
38/KM90 19 2 0.5 2 0.5 4 64 –A–– –––––– V–––– + +
39/Z13 19 2 0.5 1 0.5 4 64 –A–– –––––– V–––– + +
40/H29 23 1 0.5 2 0.5 4 64 –A–– –––––– V–––– + +
41/B99 23 1 0.5 2 0.5 4 64 –A–– –––––– V–––– + +
42/H0 14 4 1 4 1 8 64 –A–– –––––– V–––– + +
27/S46 23 0.5 0.5 1 0.25 2 32 –A–– –––––– V–––– +
1A22/HA5 6 0.25 0.5 1 0.25 2 16 –A–– –––––– V–––– +
V 20/SHA3 19 2 4 16 4 32 64 –A–– V––––– V–––– + +
29/KK133 23 2 8 16 4 32 64 –AF– –––––– V–––– + +
30/NG44 23 2 2 16 2 16 64 –AF– –––––– V–––– + +
31/KU5 23 1 2 8 2 8 64 –AF– –––––– V–––– + +
32/KU81 19 4 4 16 2 16 64 –AF– –––––– V–––– + +
33/AK5 14 0.125 4 16 2 2 8 –AF– –––––– V–––– +
a

Susceptibilities to PC, CTX, cefpodoxime (CPDX), cefditoren (CDTR), cefdinir (CFDN), and cefaclor (CCL) were determined by previously described methods (1). 

b

Only amino acid residues differing from PBP 2X conserved motif sequences of the PSSP strain R6 are shown. Conserved amino acid motifs are underlined. 

c

Altered PBP genes were detected by PCR as described previously (29). +, altered; −, not altered.