Table 1. Antimicrobial spectrum of the isolated S. hyointestinalis B19 strains against some of pathogenic bacteria including five strains of C. perfringens (+ means showing positive inhibition effect to indicator bacteria; +++, very strong inhibition; ++, strong; +, a little inhibition)

Indicator microorganisms	S. hyointestinalis B19
Clostridium perfringens KCTC 5100	++
Clostridium perfringens KCTC 5101	-
Clostridium perfringens KCTC 5102	++
Clostridium perfringens USDA	+++
Clostridium perfringens KCTC 3269T	+++
Staphylococcus aureus ATCC 33591	-
Staphylococcus aureus ATCC 27664	-
Staphylococcus aureus 35	-
Listeria monocytogenes ATCC 19114	+++
Listeria monocytogenes ATCC 19115	+
Listeria monocytogenes ATCC 7644	+++
Listeria monocytogenes KCTC 3569	+++
Listeria monocytogenes KCTC 13064	+++
Campylobacter jejuni ATCC 33291	-
Campylobacter jejuni ATCC 33560	-
Escherichia coli ATCC 43888	-
Escherichia coli YHS 394	-
Escherichia coli ATCC 25922	-
Salmonella enteritidis YHS 383	-