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Table 2 Contamination rates for all 3 types of samples processed

From: Comparison of the MGIT 960, BACTEC 460 TB and solid media for isolation of Mycobacterium bovis in United States veterinary specimens

 

Contamination rates

Media inoculated

Fresh/frozen samples (liquid only)

Routine slaughter surveillance histologically non-compatible granulomas

Histologically compatible and other high risk samples

BACTEC 12B

0.07

N/A

0.07

MGIT

0.18

0.24

0.18

M7H11P

N/A

0.14

0.34

7H10P

N/A

0.24

0.49

M-LJ

N/A

0.07

N/A*

7H11AA&P

N/A

0.29

N/A*

  1. Samples submitted fresh or frozen were inoculated only using the 2 liquid media systems. Routine slaughter surveillance samples were inoculated using MGIT and 4 solid media. High risk samples were inoculated on both liquid systems and at least 3 solid media.
  2. * Media results for these samples were not included in the log linear model.