type (WT)j and two distinct but closely related virulent bacteriophages isolated from industrial yogurt samples, phase 858 and phase 2972 (//). 'Danisco USA Inc., 3329 Agriculture Drive, Madison, WI 53716, USA. iDanisco France SAS, Bate Postale 10, F-86220 Dange.Saint.Romain. France. -tepartement de Bi3chimi