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Table 4 Total Staphylococcus and Streptococcus bacterial counts (cfu/mL) on teat skin from two herds (A, B) and for two pre-milking teat disinfection treatments (PTD: that received pre-milking teat disinfectant and NPTD: did not receive disinfectant) across four sampling points during lactation

From: Effect of pre-milking teat disinfection on new mastitis infection rates of dairy cows

 

Herd A

Herd B

s.e.

Significance p-value

Staphylococcus (cfu/mL)

52.4

14.5

3.76

< 0.001

Streptococcus (cfu/mL)

27.2

13.5

3.48

< 0.001

 

NPTD

PTD

  

Staphylococcus (cfu/mL)

50.1

16.8

3.76

< 0.001

Streptococcus (cfu/mL)

30.1

10.6

3.47

< 0.001

  1. cfu/mL = Colony forming units per millilitre
  2. Total number of observations = 612