TABLE 3.

Bifidobacterial species detected via species-specific PCR^a

Substrate	B. adolescentis	B. angulatum	B. bifidum	B. breve	B. catenulatum	B. longum	B. infantis	B. dentium
1% (wt/vol) Polydextrose	+		+		+	+		+
1% (wt/vol) Lactitol	+		+		+	+		+
0.5% (wt/vol) Polydextrose + 0.5% lactitol	+		+	+		+		+
1% (wt/vol) Oligofructose	+	+	+		+	+		+
2% (wt/vol) Polydextrose (p)	+	+	+		+	+	+	+
1% (wt/vol) Oligofructose (p)	+		+		+	+		+

^aDNA recovered from the first vessel of the in vitro fermentation systems was subject to PCR analysis by using species-specific primers for bifidobacteria. (p), parallel fermentations. B. gallicum was not detected with any of the substrates used.