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Table 3 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 red deer

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

Intestinal ln

5

no ct

no ct

no ct

no ct

negative

negative

2

Intestinal ln

3

no ct

no ct

no ct

no ct

no ct

no ct

negative

negative

negative

3

Mesenteric ln

2

no ct

no ct

no ct

no ct

negative

negative

4

Intestinal ln

8

no ct

no ct

no ct

no ct

negative

negative

5

Intestinal ln

3

no ct

no ct

no Ct

no Ct

negative

negative

6

Peritoneum

2

no ct

no ct

no Ct

no Ct

negative

negative

7

Intestinal ln

4

no ct

no ct

no Ct

no Ct

41.90

no ct

negative

negative

negative

8

Mesenteric ln

3

35.63

34.79

ne

ne

positive

9

Intestinal ln

3

no ct

37.57

ne

ne

positive

positive

Lung

5

26.27

26.14

27.00

27.20

10

Intestinal ln

2

no ct

no ct

no Ct

no Ct

negative

negative

Lung

3

no ct

no ct

ne

ne

11

Intestinal ln

19

33.78

35.20

35.02

35.53

33.11

33.60

positive

positive

positive

Retropharyngeal ln

3

no ct

39.54

38.09

37.96

41.77

41.11

12

Intestinal ln

5

37.54

36.79

35.67

36.38

37.82

38.08

positive

positive

positive

Retropharyngeal ln

11

no ct

no ct

38.82

39.81

37.03

36.81

13

Lung

7

33.74

34.62

35.90

36.20

positive

positive

Pleura

2

37.14

37.07

36.10

37.20

  

Palatine tonsil

3

35.49

36.08

33.20

33.10

  

Mass

8

34.03

38.53

32.80

33.10

  

Diaphragm

11

31.85

31.84

38.10

37.60

  

14

Lung

3

no ct

no ct

no Ct

no Ct

no ct

no ct

negative

negative

negative

15

Retropharyngeal ln

8

no ct

no ct

no Ct

no Ct

no ct

39.92

negative

negative

negative

16

Intestinal ln

2

no ct

no ct

ne

ne

no ct

no ct

negative

negative

17

Retropharyngeal lna

5

17.95

25.95

26.88

27.61

25.91

26.25

positive

positive

positive

18

Intestinal ln

2

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