Preparation is transparent liquid, with yellow to light brown colour.
Pharmacological actions: Pyo bacteriophage leads to a specific lysis of bacteria belonging to: Staphylococcus (S. aureus), Streptococcus (S.pyogenes, S. sanguis, S.salivarius, S. agalactiae), E.coli (Different types), Pseudomonas Aeruginosa, Proteus (Mirabilis and Vulgaris) spices.