Table 4.
Microbiological results based on conventional diagnostic methods (n = 2883 mastitic udder milk samples) and their distribution by lactation number.
| Lactation | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| First Lactation | Second Lactation | Third Lactation and Beyond | ||||||||
| Microbiological Findings | n | % 1 | % 2 | n | % 1 | % 2 | n | % 1 | % 2 | Total (n) |
| Streptococcus uberis | 141 | 24.3 | 24.4 | 139 | 23.9 | 19.4 | 301 | 51.8 | 19.0 | 581 |
| NaS | 49 | 28.5 | 8.5 | 34 | 19.8 | 4.7 | 89 | 51.7 | 5.6 | 172 |
| Staphylococcus aureus | 51 | 31.1 | 8.8 | 40 | 24.4 | 5.6 | 73 | 44.5 | 4.6 | 164 |
| Streptococcus dysgalactiae | 25 | 29.1 | 4.3 | 17 | 19.8 | 2.4 | 44 | 51.2 | 2.8 | 86 |
| Trueperella pyogens | 6 | 15.8 | 1.0 | 11 | 28.9 | 1.5 | 21 | 55.3 | 1.3 | 38 |
| Coliforms | 41 | 12.3 | 7.1 | 92 | 27.6 | 12.8 | 200 | 60.1 | 12.6 | 333 |
| Mixed infections | 33 | 31.1 | 5.7 | 23 | 21.7 | 3.2 | 50 | 47.2 | 3.1 | 106 |
| Others 3 | 38 | 19.7 | 6.6 | 51 | 26.4 | 7.1 | 104 | 53.9 | 6.5 | 193 |
| No growth | 157 | 15.5 | 27.1 | 260 | 25.7 | 36.3 | 593 | 58.7 | 37.3 | 1010 |
| Contaminated 4 | 38 | 6.6 | 49 | 6.8 | 113 | 7.1 | 200 | |||
| Total | 579 | 716 | 1588 | 2883 | ||||||
1: Proportion of cases of all cases caused by the pathogen group. 2: Proportion of cases of all cases of the respective phase of lactation. 3: Prototheca spp., Bacillus spp., Enterococcus spp., yeast, Pseudomonas spp., Corynebacterium spp., other streptococci. 4: More than two different pathogens were detected in one sample. NaS: non-aureus staphylococci.