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Table 2 MAP: Blood ELISA, INFγ, plaque qPCR & fecal PCR

From: Comparison of a mycobacterial phage assay to detect viable Mycobacterium avium subspecies paratuberculosis with standard diagnostic modalities in cattle with naturally infected Johne disease

MAP

Control

Johne

Pos

Neg

Pos

Neg

%

#

%

#

%

#

%

#

ELISA

0

0/17

100

17/17

31

10/32

69

22/32

IFNγ

12

2/17

88

15/17

69

22/32

31

10/32

Fecal PCR

0

0/17

100

17/17

75

24/32

25

8/32

Phage / qPCR

35

6/17

65

11/17

72

23/32

28

9/32

  1. A summary of standard test results compared with the data from the phage/qPCR experiments. In the Control animals the ELISA and fecal PCR have no positives, whereas IFN-γ was 12% and phage / qPCR 35% positive. ELISA (31%+) is least sensitive in the Johne animals. IFN-γ (69%+), fecal PCR (75%+) and phage / qPCR (72%+) the most sensitive