TABLE 3.

A 0.2-μm-pore-size, 47-mm-diameter polycarbonate membrane provides D. pigrum with some protection against inhibition by oleic acid in vitro^a

Plated vol of oleic acid (μg)	Result for indicated D. pigrum strain
	Growth directly on agar		Growth on membrane
	KPL1914	CDC4709-98	KPL1914	CDC4709-98
500	0	0	0	+
50	0	0	+	+
5	+	+	+	+
0.5	+	+	+	+
0.05	+	+	+	+
0 (BHI agar)	+	+	+	+
0 (CSBA)	+	+	+	+

^a0, no growth; +, growth detected; n = 3. CSBA, citrated sheep blood agar.