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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