Escherichia coli - 4971, 5078, 5081, 5082, 5083, 649100, 650974, 691007, 716878 Escherichia coli CR63MA - 5078 Escherichia coli NCTC 10418 - 5081 Klebsiella aerogenes - 5080 Leptospira interrogans - 677338 no activity in Bacillus subtilis hexarate-grown 4971 Picrophilus torridus - 704334