Skip to main content

Table 2 Ct-values of the three DNA extraction protocols of the MTC-specific target genes Heli and IS 1081 generated with the field tissue samples of cattle

From: Two alternative DNA extraction methods to improve the detection of Mycobacterium-tuberculosis-complex members in cattle and red deer tissue samples

Animal No.

Tissue

Weight in grams

Protocol 1

Protocol 2

Protocol 3

Protocol 1

Protocol 2

Protocol 3

Heli

IS 1081

Heli

IS 1081

Heli

IS 1081

Overall result per animal

1

Lung

5

no ct

no ct

no ct

no ct

negative

negative

Diaphragm

5

no ct

no ct

no ct

no ct

2

Lung

5

no ct

no ct

no ct

no ct

negative

negative

3

Intestinal ln

3

no ct

no ct

no ct

no ct

negative

negative

negative

Kidney

3

no ct

no ct

no ct

no ct

no ct

no ct

Kidney ln

2

no ct

no ct

no ct

no ct

no ct

no ct

4

Intestinal ln

5

no ct

no ct

no ct

no ct

negative

negative

negative

Liver

4

no ct

no ct

no ct

no ct

no ct

no ct

5

Ln cervicalis superf.

8

no ct

no ct

no ct

no ct

no ct

no ct

negative

negative

negative

Mediastinal ln

10

no ct

no ct

no ct

no ct

no ct

no ct

Kidney

7

no ct

no ct

no ct

no ct

Kidney ln

4

no ct

no ct

no ct

no ct

6

Liver

5

no ct

no ct

no ct

no ct

negative

negative

negative

Lung

2

no ct

no ct

no ct

no ct

no ct

no ct

Kidney

4

no ct

no ct

no ct

no ct

7

Lunga

3

no ct

no ct

no ct

no ct

no ct

no ct

negative

negative

8

Lung ln

6

27.20

26.96

31.60

32.50

positive

positive

9

Retropharyngeal ln

3

37.99

37.58

36.93

37.64

positive

positive

10

Intestinal ln

4

31.10

30.54

28.87

29.32

31.85

32.08

positive

positive

positive

11

Liver ln

4

43.92

37.32

35.59

35.00

37.54

39.29

positive

positive

positive

Lung

2

34.26

31.18

37.77

39.37

37.56

38.68

12

Intestinal ln

5

28.21

26.69

31.10

31.50

positive

positive

13

Intestinal ln

6

29.23

28.02

38.42

39.25

35.53

35.65

positive

equivocal

positive

14

Intestinal ln

4

no ct

no ct

33.90

33.92

33.97

34.20

negative

positive

positive

15

Diaphragm

10

no ct

no ct

no ct

no ct

no ct

no ct

negative

negative

negative

Diaphragm

10

no ct

no ct

no ct

no ct

no ct

no ct

Diaphragm

3

no ct

no ct

no ct

no ct

16

Intestinal ln

3

35.31

35.60

no ct

no ct

33.41

34.74

positive

positive

positive

Lung

3

no ct

no ct

no ct

no ct

no ct

no ct

Lung ln

3

29.71

30.38

30.45

31.05

30.56

30.90

Spleen

6

no ct

no ct

no ct

no ct

41.09

37.00

Kidney

8

no ct

no ct

no ct

no ct

no ct

no ct

17

Intestinal ln

3

34.31

34.36

32.00

32.20

positive

positive

18

Liver

4

no ct

no ct

no ct

no ct

positive

positive

positive

Lunga

5

26.53

27.10

24.80

24.86

26.28

26.73

Mediastinal ln

8

30.22

30.40

32.66

33.19

32.57

32.82

Spleen

5

no ct

no ct

34.50

35.70

Kidney

3

no ct

no ct

38.80

38.20

Retropharyngeal ln

2

no ct

no ct

ne

ne

19

Mediastinal ln

3

no ct

no ct

no ct

no ct

no ct

no ct

negative

negative

negative

20

Intestinal ln

5

32.95

32.87

33.80

34.40

positive

positive

Mediastinal ln

5

35.88

36.29

38.70

40.90

Retropharyngeal ln

4

no ct

no ct

no ct

no ct

21

Lung ln

4

no ct

no ct

29.29

30.08

31.59

31.43

negative

positive

positive

22

Intestinal ln

8

no ct

no ct

no ct

no ct

no ct

no ct

negative

negative

negative

Liver

6

no ct

no ct

no ct

no ct

no ct

no ct

Lung

6

no ct

no ct

no ct

no ct

Lung ln

9

no ct

no ct

no ct

no ct

Spleen

6

no ct

no ct

no ct

no ct

Kidney

9

no ct

no ct

no ct

no ct

Retropharyngeal lna

5

no ct

no ct

no ct

no ct

no ct

no ct

23

Kidney

2

no ct

no ct

ne

ne

ne

ne

negative

positive

equivocal

Muscle

9

no ct

no ct

37.60

37.72

38.65

40.23

Palatine tonsil

3

no ct

no ct

39.57

41.83

39.17

39.14

24

Udder ln

3

no ct

no ct

no ct

no ct

no ct

no ct

negative

negative

negative

25

Intestinal ln

2

no ct

no ct

32.92

34.22

31.61

31.05

negative

positive

positive

26

Lung ln

5

no ct

no ct

no ct

no ct

negative

negative

negative

Rumen

5

no ct

no ct

no ct

no ct

no ct

no ct

27

Lung

6

no ct

no ct

no ct

no ct

negative

negative

negative

Thymus

16

no ct

no ct

no ct

no ct

no ct

no ct

28

Lung

6

no ct

no ct

39.00

no ct

negative

negative

29

Pelvic ln

5

no ct

no ct

no ct

no ct

negative

positive

positive

Mesentery

8

no ct

no ct

36.32

36.63

37.46

38.95

Kidney

6

no ct

no ct

no ct

no ct

Perintoneum

11

no ct

no ct

no ct

no ct

no ct

no ct

30

Intestinal ln

3

no ct

no ct

34.14

34.49

38.22

38.39

negative

positive

positive

Liver ln

5

no ct

no ct

no ct

no ct

Lung ln

6

no ct

no ct

no ct

no ct

Retropharyngeal ln

7

no ct

no ct

no ct

no ct

31

Kidney

5

no ct

no ct

no ct

no ct

  

negative

negative

32

Lung

5

no ct

no ct

no ct

no ct

no ct

no ct

negative

negative

negative

Lung ln

5

no ct

no ct

no ct

no ct

33

Lung ln

6

no ct

no ct

no ct

no ct

negative

negative

34

Spleen

3

no ct

no ct

no ct

no ct

no ct

no ct

negative

negative

negative

  1. ln lymph node, ne not evaluable
  2. – not done
  3. amicroscopic examination of Ziehl-Neelsen-stained sediments