Table 3

Groups of S. suis strains with different combinations of tetracycline genes and respective minimal inhibitory concentrations.

Number of isolates

Group

Tetracycline resistance genes

MIC50* (mg/L)

Range of MIC (mg/L)

p-values#


5

1

tet(M), tet(O) and tet(L) or tet(M) and tet(L)

64

64 - 256

0.01 (group 1 vs. 2)

<0.001 (group 1 vs. 3)

0.002 (group 1 vs. 4)

0.002 (group 2 vs. 3)

0.03 (group 2 vs. 4)

0.08 (group 3 vs. 4)


8

2

tet(M) and tet(O)

32

24 - 48


116

3

tet(M)

24

3 - 48


22

4

tet(O)

24

16 - 32


* MIC50 is the MIC value inhibiting growth of 50% of tested isolates

# Pair-wise comparisons based on Wilcoxon rank-sum tests with Holm correction for multiple testing

Hoa et al. BMC Infectious Diseases 2011 11:6   doi:10.1186/1471-2334-11-6

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