Penicillium sp. LBKURCC34 has the ability to produce antibacterial activity by single and co-culture fermentation. To increase diversity of chemical compounds, in this study, Penicillium sp. LBKURCC34 was fermented by co-culture with the addition of Staphylococcus aureus on day 3rd for 14 days incubation. To obtain active fractions as antibacterial activity from the ethyl acetate extract ag…