10.22376/ijpbs.2019.10.1.p1-12 Volume 2 Issue 4 2011 (October - December) The antibacterial activity of moss lessThan i greaterThan Physcomitrium japonicum lessThan /i greaterThan (Hedw.) was studied against the various bacteria namely lessThan i greaterThan Bacillus subtilis lessThan /i greaterThan (MTCC-441) , lessThan i greaterThan Escherichia coli lessThan /i greaterThan (MTCC-41) lessThan i greaterThan , lessThan /i greaterThan lessThan i greaterThan Staphylococcus aureus lessThan /i greaterThan (MTCC-740) lessThan i greaterThan , Pseudomonas aeruginosa lessThan /i greaterThan (MTCC-424) and lessThan i greaterThan Agrobacterium tumefaciens lessThan /i greaterThan (MTCC-2250) by agar well diffusion technique. The extracts of aqueous and organic solvents were tested against the all bacterial culture. All the extracts showed antibacterial activity against all tested microorganism. The results suggest the potential of lessThan i greaterThan P. japonicum lessThan /i greaterThan for developing a broad spectrum antibacterial formulation in future. B.L.Chaudhary And Shabana Khanam Antibacterial, moss, bacteria, phytochemical screening, Agar well assay, Zone of inhibition (ZI) 667-673