TABLE 3.

Milk samples with positive bacteriological examination results

Bacterium	No. of positive samples in group at wk posttreatment
	Nisin treated			Control
	0a	1	2	0a	1	2
S. aureus	14	7b	7b	11	9	9
CNS	17	14	7b	11	9	8
Streptococcus agalactiae	11	3b	1b	19	18	18
Streptococcus dysgalactiae	2	1	1	2	1	1
Streptococcus uberis	2	1	0	1	1	1
Total	46	26b	16b	44	38	37

^aPretreatment.

^bSignificantly different compared with pretreatment value within the same group (P < 0.05).