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Table 1 Comparison of two strains of D29 and two sources of ferrous ammonium sulfate (FAS)

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

  

Plaque #

D29 pfu/ml

D29: U. Pittsburgh

D29: Queens U. Belfast

Positive Control

102

92

98

10

10

17

1

1

1

FAS USA

108

14

0

108

21

0

108

23

0

FAS EUROPE

108

20

0

108

23

0

108

23

0

  1. A comparison of two sources of mycobacteriophage D29, (see Materials and methods) with two sources of the virucide, ferrous ammonium sulfate (see Materials and methods). Satisfactory viricidal action was only achievable with D29 sourced from Queens University Belfast, (see example in Fig. 1a). As a consequence, the QUB D29 was used in all subsequent experiments. PFU: Plaque Forming Units