▎ 摘　　要

NOVELTY - Antibacterial composition comprises Aspergillus strain, its culture, and graphene oxide reduced to more than one filtrate of culture. USE - The antibacterial composition is useful as medicinal composition and health food composition for preventing or treating microbial infection disease e.g. food poisoning, diarrhea, vomiting, enteritis, gastroenteritis, constipation, abdominal pain and abdominal distension (all claimed). ADVANTAGE - The composition is safe, nontoxic and has excellent antibacterial activity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing reduced graphene oxide filtrate of Aspergillus strain culture, comprising obtaining a filtrate of the Aspergillus strain culture, sonicating the graphite oxide formed by oxidizing graphite to prepare graphene oxide; and culturing by mixing the filtrate of the obtained Aspergillus strain culture with the prepared graphene oxide.