Penicillium kills the bacterium Staphylococcus. This sort of relationship is called:
Antibiotics produced by fungi eliminates the bacterial population. The fungal population is not affected by this interaction. This type of relationship that harms one species but does not have any effect on other species is called ammensalism. For example, the interaction between Penicillium and bacterium Staphylococcus. Penicillium eradicates the growth of Staphylococcus by producing antibiotic penicillin.