Research on antibacterial activity of jockfruit wood (A heterophylla Lmk) ethanolic extract to B, subtilis and E coli in vitro have been done, jackfruit woor ethanolic extraction was done with maceration method using ethonolic solvent 70%. Antibacterial activity test used agar diffution method. There were tesred 5 groups of serial extract concentration 1%, 10% and 100%; positive control (tetrac…