Table 7

MRSA transmission parameter and R0-values
No risk antimicrobials; pIP = 0 Risk antimicrobials; pIP = 0 No risk antimicrobials; pIP = 1 Risk antimicrobials; pIP = 1
Country C/S4) TP2 R0 95% CI TP2 R0 95% CI TP2 R0 95% CI TP2 R0 95% CI
NL 377/704 0.035 0.62 0.45 - 0.84 0.089 1.54 0.84 - 2.83 0.188 3.28 1.43 - 7.49 0.470 8.17 2.65 - 25.22
DK 188/240 0.001 0.02 0.00 - 0.07 0.002 0.03 0.00 – 0.16 6958 121076 307.31 - ∞ 10117 176041 287.92 - ∞
NL + DK 565/944 0.039 0.68 0.54 - 0.85 0.076 1.32 0.84 - 2.06 0.309 5.38 2.74–10.56 0.603 10.50 4.31 - 25.59

Legend: this table shows the transmission per day resulting from bivariable analysis with use of risk antimcrobials1) and the relative proportion of IP compared to the total IP (pIP) included in the model2) (TP2) and R0-value3) with its 95% confidence interval for Dutch (NL) and Danish (DK) farms separately and all farms combined (NL + DK) for pre-weaning pigs only.

1) Risk antimicrobials (tetracyclins and β-lactams) in > 1 pig per pen.

2) Interaction between variables was not significant (P > 0.05).

3) To calculate R0, TP2was multiplied with 17.4 days (= length of infectious period).

4) Number of MRSA cases (C) from total number of susceptibles (S) used in analysis.

Broens et al.

Broens et al. BMC Veterinary Research 2012 8:58   doi:10.1186/1746-6148-8-58

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