Genes capsule overview (cap5 & cap8) in identify Methicillin-Resistant
Staphylococcus aureus from clinical samples
Abstract
Staphylococcus aureus (S. aureus) is an important pathogen that is
involved in causing various infections. In recent years, attempts to
treat infections caused by these strains have led to resistance to most
antibiotics, especially methicillin and vancomycin. In this study, we
evaluated genes capsule in MRSA isolated from clinical samples of
hospitals affiliated with the Tehran University of Medical Sciences. 73
clinical samples suspected of MRSA were collected and confirmed
phenotypically and biochemically. PCR was done by studying the presence
of cap8, cap5, vanA, and mecA genes. All 73 samples were confirmed as
MRSA both by biochemical tests and by examining the presence of the mecA
gene. Wound with 21 (28.77%) was the most, and synovial fluid with 1
(1.36%) was the least analyzed sample. The ICU department had the
highest amount of MRSA samples, with 25 (34.24%), and the ENT, with 1
(1.36%), had the lowest amount. 32 isolates (43.84%) contained the
cap5 gene, 27 (36.99%) cap8 gene, and 5 (6.84%) had the vanA gene.
Among the isolated VRSAs, 2 (40%) isolates contained both cap5&8 genes
simultaneously. The results of antimicrobial tests showed multi drugs
resistance in these isolates.