TABLE 1.

Concentration of microorganisms in a subsample of water drained from one head of lettuce or one bundle of spinach^a

Product and sample no.	No. of cells/ml of drained water
	Bacteria	Ciliates	Flagellates	Amoebae	Nematodes
Spinach
1	1.5 × 108	—b	5.0 × 105	—	—
2	2.2 × 109	—	3.0 × 106	—	—
3	4.2 × 108	1.0 × 102	8.2 × 106	3.2 × 101	—
4	5.9 × 108	1.6 × 102	3.6 × 106	2.7 × 101	5.0 × 101
5	1.6 × 107	—	7.4 × 105	—	—
6	4.9 × 107	—	2.6 × 105	—	—
7	5.2 × 107	—	2.6 × 105	—	—
8	8.6 × 107	—	—	—	—
Romaine lettuce
1	12.0 × 106	—	—	—	—
2	2.8 × 107	—	1.5 × 106	—	—
3	9.5 × 106	—	1.8 × 105	—	—
4	4.0 × 106	—	1.1 × 105	—	—
5	1.0 × 107	—	3.7 × 105	—	—
6	1.6 × 106	—	—	—	—

^aSamples of 1.5 to 35 ml were tested. Samples were purchased on different days.

^b—, none observed in two subsamples.