Table 1 Overall bacteriological milk culture results originating from the aDBT and the no-aDBT groups samples at drying-off and at the resumption of milking (< 10 DIM). Percentages represent the proportion calculate on the total number of bacteriological examinations
Pathogens | Gram stain | Sampling at drying-off | First sampling of the new lactation | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Overall No. | % | No. in aDBT group | % | No. in no-aDBT group | % | Overall No. | % | No. in aDBT group | % | No. in no-aDBT group | % | ||
Staphylococcus aureus | Gram+ | 73/160 | 45.6 | 40/80 | 50.0 | 33/80 | 41.2 | 44/160 | 27.5 | 18/80 | 22.5 | 29/80 | 36.3 |
Coagulase-negative staphylococci | Gram+ | 17/160 | 10.6 | 9/80 | 11.2 | 8/80 | 10.0 | 22/160 | 13.7 | 13/80 | 16.2 | 9/80 | 11.2 |
Streptococcus agalactie | Gram+ | 3/160 | 1.9 | 3/80 | 3.7 | / | / | 2/160 | 1.2 | 1/80 | 1.2 | 1/80 | 1.2 |
Streptococcus dysgalactie | Gram+ | / | / | / | / | / | / | 1/160 | 0.6 | / | / | 1/80 | 1.2 |
Streptococcus thoralensis | Gram+ | 3/160 | 1.9 | 3/80 | 3.7 | / | / | / | / | / | / | / | / |
Streptococcus uberis | Gram+ | 2/160 | 1.2 | 1/80 | 1.2 | 1/80 | 1.2 | 2/160 | 1.2 | / | / | 2/80 | 2.5 |
Streptococcus spp. | Gram+ | / | / | / | / | / | / | 11/160 | 6.9 | 5/80 | 6.2 | 6/80 | 7.5 |
Enterococcus faecalis | Gram+ | / | / | / | / | / | / | 1/160 | 0.6 | / | / | 1/80 | 1.2 |
Aerococcus viridans | Gram+ | 8/160 | 5.0 | / | / | 8/80 | 10.0 | 2/160 | 1.2 | 1/80 | 1.2 | 1/80 | 1.2 |
Other bacteria | Gram+ | 13/160 | 8.1 | 7/80 | 8.7 | 6/80 | 7.5 | 28/160 | 17.5 | 20/80 | 25.0 | 8/80 | 10.0 |
Escherichia coli | Gram- | 1/160 | 0.6 | / | / | 1/80 | 1.2 | 30/160 | 18.7 | 16/80 | 20.0 | 14/80 | 17.5 |
Aeromonas spp. | Gram- | / | / | / | / | / | / | 13/160 | 8.1 | 6/80 | 7.5 | 7/80 | 8.7 |
Klebsiella oxytica | Gram- | / | / | / | / | / | / | 5/160 | 3.1 | / | / | 5/80 | 6.2 |
Other bacteria | Gram- | 1/160 | 0.6 | / | / | 1/80 | 1.2 | 10/160 | 6.2 | 5/80 | 6.2 | 5/80 | 6.2 |
Negative | Â | 42/160 | 26.2 | 33/80 | 41.2 | 9/80 | 11.2 | 33/160 | 20.6 | 11/80 | 13.7 | 22/80 | 27.5 |