Table 2.

Summary of all transmission events of psychrotolerant spore-forming (PSF) bacteria from bulk tank milk to later process stages as determined by RAPD typing of 90 strains from 10 batches of ESL milk.

Batch	Species	Isolated from	Bulk tank milk
			Abundance of species [% of PSF]	PSF count [MPN/mL]
1	P. taichungensis/tundrae	BM SM PE EP	90%	1.84
2	P. odorifer	BM SM PE	5%	0.17
3	B. cereus sensu lato	BM PA	5%	0.63
4	B. pumilus/safensis	BM EP	5%	0.33
5	P. sp. nov. 1	BM EP	42%	1.70
	P. odorifer	BM EP	31%

In five batches, no transmission was observed (data not shown). For batches 1–3, isolates were obtained from bulk tank milk (BM), skim milk (SM), permeate (PE), pasteurized milk (PA), and end products (EP) — for batches 4 and 5, from bulk tank milk and end products only.