Table 3.
Relative risk of detection of the genes with a significant different distribution in the four classes of prevalence of intramammary infections by S. aureus, using the lower frequency class as reference. MLP, herds with prevalence 5.1–24%; MHP, prevalence 24.1–40%; HP, prevalence >40.1%.
| Genes | Relative Risk to the LP Class | ||||
|---|---|---|---|---|---|
| Sign. | MLP | MHP | HP | ||
| sea | 0.034 | 1.61 | 3.41 | 5.53 | enterotoxin A |
| sed | 0.001 | 1.91 | 4.84 | 7.97 | enterotoxin D |
| ser | 0.001 | 1.64 | 4.92 | 8.05 | enterotoxin R |
| sej | 0.001 | 1.64 | 4.92 | 8.05 | enterotoxin J |
| lukD | 0.001 | 5.53 | 16.12 | 6.76 | leukocidin D component |
| lukE | 0.010 | 3.50 | >25.00 | 6.76 | leukocidin E component |
| hlb probe 3 | 0.007 | 4.66 | 4.126 | 6.09 | haemolysin beta |
| sak | 0.020 | 1.50 | 3.69 | 5.78 | staphylokinase |
| scn | 0.020 | 1.50 | 3.69 | 5.78 | staphylococcal complement inhibitor |
| splA | 0.036 | 3.65 | >25.00 | 5.71 | serin–protease A |
| splB | 0.050 | 3.56 | >25.00 | 4.90 | serin–protease B |
| splE | 0.000 | 5.04 | 7.25 | 10.47 | serin–protease E |
| aur ★ | 0.050 | 3.56 | >25.00 | 4.90 | aureolysin |
| fib | 0.050 | 3.56 | >25.00 | 4.90 | fibrinogen-binding protein |
| ebpS probe 612 | 0.004 | 5.48 | >25.00 | 6.75 | cell surface elastin-binding protein |
| clfB ▲ | 0.000 | 8.60 | 11.74 | 17.40 | clumping factor B |
| fnbA ✦ | 0.000 | 2.94 | 7.11 | 7.21 | fibronectin-binding protein A |
| fnbB ✦ | 0.000 | 16.99 | 13.93 | 31.81 | fibronectin-binding protein B |
| sasG ▲ | 0.000 | 5.82 | 3.69 | 6.19 | S. aureus surface protein G |
| sasG * | 0.000 | 5.26 | 2.23 | 6.54 | |
| sdrC ✦ | 0.002 | 3.97 | 2.29 | 5.68 | Serine–aspartate repeat protein C |
| sdrC * | 0.000 | 3.28 | 12.75 | 15.22 | |
| sdrD ※ | 0.002 | 4.27 | 3.25 | 7.52 | Serine–aspartate repeat protein D |
| vwb ※ | 0.000 | 4.55 | 3.38 | 12.78 | van Willebrand factor-binding protein |
* Indicates other allelic variants than MRSA252 (CC30). ▲ indicates the allelic variant shared by COL (CC8) and Mu50 (CC5). ✦ indicates the allelic variant of COL (CC8). ★ indicates other allelic variants than MRSA252 (CC30) and RF122 (CC151/CC705). ※ indicates the allelic variant shared by COL (CC8) and MW2 (CC1).