Table 3.
Temporal (monthly) and spatial change in the proportion of bovine milk samples positive for various mastitis pathogens between 2008 and 2017 in Ontario, Canada.
| Parameters | Percentage of samples showing growth of different mastitis pathogens | Total samples per category | |||
|---|---|---|---|---|---|
| Category | Staphylococcus aureus | Corynebacterium spp. | Streptococcus uberis | ||
| Month | January | 7.90 | 4.32 | 5.94 | 6,728 |
| February | 7.85 | 6.99 | 7.49 | 7,001 | |
| March | 10.48 | 7.81 | 7.93 | 7,172 | |
| April | 9.85 | 10.76 | 7.68 | 6,648 | |
| May | 7.78 | 8.09 | 0.85 | 6,461 | |
| June | 8.90 | 7.15 | 8.42 | 7,539 | |
| July | 10.00 | 10.80 | 11.64 | 9,151 | |
| August | 9.11 | 11.54 | 12.94 | 9,595 | |
| September | 7.96 | 7.54 | 8.79 | 7,439 | |
| October | 7.64 | 7.62 | 7.86 | 7,009 | |
| November | 6.73 | 11.58 | 7.06 | 6,073 | |
| December | 5.80 | 5.81 | 5.39 | 5,163 | |
| Location | Central Ontario | 8.35 | 8.13 | 8.85 | 7,165 |
| Eastern Ontario | 28.00 | 31.92 | 20.25 | 22,220 | |
| Northern Ontario | 2.93 | 2.87 | 2.04 | 1,952 | |
| Southwestern Ontario | 60.72 | 57.09 | 68.85 | 54,642 | |
| Total (N) | 13,411 | 2,547 | 1,615 | 85,979 | |