Table 2.
Distribution of the results of 14,586 cytological analyses performed on quarter milk samples of cows in the first 30 days of lactation.
| Pathogen Isolated | SCS ± Std.dev. (Log10/mL) |
DSCC ± Std.dev. (%) | PLCC ± Std.dev. (Log10/mL) |
|---|---|---|---|
| NO GROWTH | 4.51 ± 0.70 a,1 | 54.48 ± 18.89 a | 4.21 ± 0.778 a |
| Major pathogens | 5.24 ± 0.85 b | 65.12 ± 16.57 b | 5.04 ± 1.03 b |
| Staphylococcus aureus | 5.21 ± 0.92 | 65.58 ± 14.50 | 5.01 ± 0.98 |
| Streptococcus uberis | 5.27 ± 0.96 | 64.32 ± 18.24 | 5.03 ± 1.05 |
| Streptococcus dysgalactiae | 5.23 ± 1.30 | 69.27 ± 15.97 | 5.12 ± 1.37 |
| Gram negative | 4.80 ± 0.85 c | 58.40 ± 16.50 c | 4.55 ± 0.85 c |
| Escherichia coli | 4.71 ± 0.74 | 55.78 ± 16.87 | 4.41 ± 0.82 |
| Other coliforms | 4.87 ± 0.86 | 60.83 ± 5.84 | 4.63 ± 1.00 |
| Minor pathogens | 4.72 ± 0.74 d | 57.89 ± 17.20 c | 4.46 ± 0.83 d |
| Coagulase-negative staphylococci | 4.72 ± 0.74 | 57.93 ± 17.12 | 4.45 ± 0.82 |
| Environmental Streptococci (Streptococci other than Str. uberis and Str. dysgalactiae) | 4.65 ± 0.85 | 56.85 ± 17.18 | 4.37 ± 0.95 |
| Enterococcus spp | 4.91 ± 0.86 | 56.17 ± 18.68 | 4.61 ± 1.00 |
| Others | 4.80 ± 0.75 | 58.85 ± 16.51 | 4.55 ± 0.82 |
1 Columns with different superscripts are statistically different (p < 0.05). Data were analysed comparing the four major classes (MP, GN, LP and negative.