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Table 6 Bacteria isolated from cases of clinical mastitis.

From: Reproductive Performance, Udder Health, and Antibiotic Resistance in Mastitis Bacteria isolated from Norwegian Red cows in Conventional and Organic Farming

 

Conventional

Organic

Diagnosis

n

%

n

%

No bacteria

26

18.1

29

30.9

Mixed bacteria

2

1.4

1

1.1

Staphylococcus aureus

40

27.8

19

20.2

CNS

5

3.5

1

1.1

Streptococcus dysgalactiaee

16

11.1

16

17.0

Streptococcus uberis

8

5.6

2

2.1

Other Streptococcus spp.

3

2.1

2

2.1

Escherichia coli

34

23.6

18

19.1

Enterococcus spp.

1

0.7

0

-

Others1

9

6.3

6

6.4

  1. 1 Proteus, Klebsiella, Archanobacter pyogenes, Pasturella, Serratia, yeast, combinations of S. aureus and Streptococcus dysgalactiae.
  2. Distribution of bacteria isolated from milk samples from quarters with sign of clinical mastitis (changes in milk secret or symptoms from quarter) in conventional and organic farming (n = 238, from 177 lactations 173 animals).