The coa genotypes and their restriction patterns observed in the present study are novel, not published earlier. Two coa patterns were observed in mastitic milk indicating multiple origins of infection, with 595 bp coa genotype being predominant in mastitic milk. aureus coagulase types have a site-specific predilection. aureus 802 isolates.Ĭonclusion: The study, being localized to only one farm, yielded different RFLP patterns as observed from different sampling sites, which indicates that different S. While as the most distant sequences with the value of 0.483 were found between S. aureus 595 (mastitic milk), and thus, they are most closely related.

The most identical sequences with the value of 0.810 were found between isolate S. On sequencing, four different sequences having unique restriction patterns were obtained. On RFLP using both restriction enzymes, four different restriction patterns P1, P2, P3, and P4 were observed. 514 bp (2 isolates) and 757 bp (4 isolates) coa genotypes were observed from nasal cavity and pus from skin wounds, respectively. Two coa genotypes, 595 bp (15 isolates) and 802 bp (4 isolates), were observed in mastitic milk. Four different genotypes of coa gene, i.e., 514 bp, 595 bp, 757 bp, and 802 bp were obtained.

aureus isolates, 25 (64.10%) isolates carried coa gene. aureus were confirmed by targeting nuc gene using PCR. Results: Of 192 different samples, 39 (20.31%) isolates of S.

These sequences were aligned for maximum homology using the Bioedit software and similarity in the sequences was inferred with the help of sequence identity matrix. One isolate from each restriction pattern was sequenced.

Different coa genotypes observed were subjected to RFLP using restriction enzymes Hae111 and Alu1, to obtain the different restriction patterns. aureus isolates were subjected to coagulase ( coa) gene PCR. The presumptive isolates were confirmed by nuc gene-based polymerase chain reaction (PCR). Materials and Methods: A total of 192 different samples from mastitic milk, nasal cavity, and pus from skin wounds of cattle from Military Dairy Farm, Jammu, India, were screened for the presence of S. Aim: This study was conducted to study the coagulase gene-based genetic diversity of Staphylococcus aureus, isolated from different samples of cattle using restriction fragment length polymorphism (RFLP) and their sequence-based phylogenetic analysis.

Identity matrix in bioedit