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Table 4 Results from analysis of milk samples by qPCR and bacterial culturea

From: Prevalence of udder pathogens in milk samples from Norwegian dairy cows recorded in a national database in 2019 and 2020

Bacterial finding

qPCR, n (%)

Bacterial culture, n (%)

Negative/other bacteria

8146 (60.1)

7153 (69,4)

Staphylococcus aureus

1865 (13.8)

1628 (15.8)

Streptococcus dysgalactiae

1,275 (9.4)

929 (9.0)

Streptococcus uberis

808 (6.0)

535 (5.2)

Streptococcus agalactiae

249 (9.0)

62 (0.6)

Total

13,560 (100)

10,307 (100)

  1. aSamples from 970 (qPCR) and 1,489 (bacterial culture) dairy herds submitted to the TINE mastitis laboratory in Norway in 2019 and 2020 with reason for sampling i) control at dry-off (cows with somatic cell count geometric mean > 100,000 cells/mL the three milk recordings before dry-off, and ii) control of group B streptococci (Streptococcus agalactiae)
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Acta Veterinaria Scandinavica

ISSN: 1751-0147