TABLE 3.

Bacterial counts in inoculated skim milk after 3 to 4 weeks of storage at 5°C

Bacterial straina	Coagulation of milk	Bacterial count (CFU/g)
		Serratia	Hafnia
H. alvei 718	−		8.2 × 108
H. alvei 718 halI mutant	−		1.8 × 109
S. proteamaculans B5a	+	2.2 × 109
S. proteamaculans B5a sprI mutant	−	2.1 × 109
S. proteamaculans B5a sprI mutant H. alvei 718	+	2.3 × 109	1.9 × 108
S. proteamaculans B5a sprI mutant H. alvei 718 halI mutant	−	2.5 × 109	4.0 × 108
S. proteamaculans B5a sprI mutant with 1 μM OHHL	+	1.6 × 109
Negative control (milk only)	−	<104	<104

^aBacteria were inoculated into milk at 10⁴ CFU/g.