Abstract
Background: Pyoderma in dog poses complexity owing to involvement of multi drug resistant bacterial infection particularly Staphylococcus species. This may result into failure of antibiotic therapy in pyoderma. Therapeutic use of lytic bacteriophage (phage) may be an alternative to deal antimicrobial resistance in veterinary medicine. There is no report available on isolation and characterization of bacteriophage from clinical cases of pyoderma in animals, hence the study was performed with aim to isolate and characterize lytic phage against methicillin resistant S. aureus (MRSA). Methods: The phage was isolated from pus sample of dog suffering from severe pyoderma. The phage was isolated using MRSA as a bacterial host and was named as Staphylococcus phage BVC1 (SPBVC1). The morphology of the phage was determined using TME and was characterised by determining the host range and lytic potential of the phage at range of temperature and pH. Result: The morphology of phage revealed an icosahedral head of diameter 81.31 nm. with sheath and a central tube and a tail of 92.08 nm. It showed strong lytic activity against Methicillin resistant S. aureus and was stable under a range of temperature varying from 4oC to 45oC and pH from 4 to 11. The phage has shown lytic activity against the MRSA however no lytic activity against the MSSA was shown by the phage. The high specificity of the phage for MRSA indicated its potential use as an alternative therapeutic approach against multidrug resistant staphylococcal infections.
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