Molecular Dynamics and Antimicrobial Resistance Pattern
of β-lactam Resistant Coagulase Positive
Staphylococcus aureus Isolated from Goat Mastitis
Muhammad Umar Javed1, Muhammad Ijaz1*,
Arslan Ahmed1, Hamza Rasheed1; Muhammad Jawad
Sabir1 and Ali Abdullah Jabir1
1Department
of Veterinary Medicine, University of Veterinary and Animal
Sciences, Lahore-Pakistan *Corresponding author:mijaz@uvas.edu.pk
Abstract
Raw goat milk can be a potential source to
transfer antibiotic-resistant pathogens between animals and humans.Due to increased
virulence and antimicrobial resistance genes acquired by
Staphylococcus aureus (S. aureus), it is considered a major public health hazard and has a
significant impact on the treatment and management of mastitis in dairy goats.
For this purpose, Coagulase-positive S. aureus (n=103) isolates from
mastitis samples in goats were evaluated to check the resistance mechanism
against β-lactam antibiotics by disc diffusion assay and by PCR. The isolates
were tested for the presence of coa, mecA, and blaZ
genes. The results of PCR analysis revealed that out of 384 milk samples
collected from goats, 103 were identified as CoPS, 37 isolates carried blaZ
gene while 19 isolates were identified as methicillin-resistant
Staphylococcus aureus (MRSA). The absolute frequency depicted that 13 of the
isolates harbored both blaZ +
mecA genes in their genetic material.
The findings of the antibiogram profile of β-lactam resistant coagulase positive
S. aureus was found
highly resistant against the oxytetracycline, followed by gentamicin and tylosin
while the maximum isolates showed sensitivity towards ciprofloxacin, levofloxacin, and moxifloxacin in both groups. The results of
antibiotic susceptibility patterns would be critical for evaluating the trends
and patterns of antimicrobial resistance (AMR), estimating the contribution of
particular genes in drug-specific resistance, and developing control measures to
decrease AMR in goats of Pakistan. The genetic analysis of the current study
concluded that genetic divergence, the transfer of zoonotic MRSA, and the
involvement of coa, mecA, and blaZ genes serve as important
virulence factors of S. aureus leading to the causation of goat mastitis.
To Cite This Article:
Javed MU, Ijaz M, Ahmed A, Rasheed H, Sabir MJ
and Jabir AA, 2024. Molecular dynamics
and antimicrobial resistance pattern of β-lactam resistant coagulase positive
Staphylococcus aureus isolated from
goat mastitis. Pak Vet J, 44(2): 423-429. http://dx.doi.org/10.29261/pakvetj/2024.182