PURPOSE: An antibacterial composition containing Porphyra tenera extract is provided to ensure antibacterial activity against pathogenic bacteria and to prevent and treat bacterial infectious diseases. CONSTITUTION: An antibacterial composition contains Porphyra tenera extract as an active ingredient. The composition has antibacterial activity against Escherichia coli, Bacillus subtilis, Candida albicans, Streptococcus mutans, or Staphylococcus aureus. The extract is isolated using water including purified water, low alcohol of C1-C4, hexane, chloform, methylene chloride, ethyl acetate, glycerin, butylene glycol, or mixture solvent. A pharmaceutical composition for preventing and treating bacterial infectious diseases contains Porphyra tenera extract as an active ingredient. A neutraceutical composition for preventing and treating bacterial infectious diseases contains the Porphyra tenera extract as an active ingredient. The neutraceutical composition is manufactured in the form of powder, granule, tablet, capsule, or beverage.본 발명은 김(Porphyra tenera) 추출물을 유효성분으로 함유하는 항균 조성물에 관한 것으로, 상세하게는 본 발명의 김 추출물은 에셔리키아 콜라이(Escherichia coli), 바실러스 서브틸리스(Bacillus subtilis), 칸디아 알비칸스(Candida albicans), 스트렙토코커스 뮤탄스(Streptococcus mutans) 및 스타필로코커스 아우레우스(Staphylococcus aureus)에 대하여 항균 활성을 나타내므로, 세균성 감염 질환의 예방 및 치료에 유용한 약학조성물 및 건강기능식품에 이용될 수 있다.
