Composted swine manure was examined for the presence of antibacterial
and antifungal activities. While commercial composts show some antibacterial
activity composted swine manure demonstrated inhibitory activity against Gram-positive
bacteria and fungi. Weaker inhibitory activity against Gram-negative
bacteria was also detected in composted swine manure. It is likely that these
antimicrobial activities are due to compounds produced by bacteria or fungi
present in the composted swine manure. An antifungal compound of possible
commercial and agricultural significance is present in composted swine manure.
Antibacterial agents of the same significance are also present.