1. Vancomycin intermediate resistant Staphylococcus aureus in the nasal cavity of asymptomatic individuals: a potential public health challenge.
- Author
-
Adeoye-Isijola M, Olajuyigbe O, Adebola K, Coopoosamy R, and Afolayan A
- Subjects
- Anti-Bacterial Agents therapeutic use, Carrier State, Humans, Methicillin-Resistant Staphylococcus aureus isolation & purification, Microbial Sensitivity Tests, Staphylococcus aureus drug effects, Staphylococcus aureus isolation & purification, Vancomycin therapeutic use, Vancomycin-Resistant Staphylococcus aureus isolation & purification, Anti-Bacterial Agents pharmacology, Methicillin-Resistant Staphylococcus aureus drug effects, Nasal Cavity microbiology, Vancomycin pharmacology, Vancomycin-Resistant Staphylococcus aureus drug effects
- Abstract
Background: The potential of transmitting multidrug resistant Staphylococcus aureus from asymptomatic individuals to healthy individuals could constitute a great challenge to antimicrobial therapy., Methods: The antibiograms of the S. aureus from asymptomatic individuals were determined by disk diffusion and agar dilution assay techniques with different antibiotics and vancomycin., Results: Of the 152 S. aureus isolated, (59)38.8% isolates were multi-drug resistant strains. Streptomycin was the most effective and inhibited (135)88.82% of the isolates while ceftazidime inhibited (24)15.8% of the isolates. While (82)54.0% of the isolates inhibited by cefuroxime had resistant colonies within their inhibition zones (Rc) and ofloxacin inhibited (100)65.8% of the isolates without having resistant colonies within the inhibition zones, ceftazidime inhibited (7)4.6% of the isolates with resistant colonies within the inhibition zones. Subjecting the isolates to vancomycin showed that (27)17.8% were resistant to 2 µg/ml, (43)28.3% were resistant to 4 µg/ml and (27)17.8% of the isolates were simultaneously resistant to both concentrations of vancomycin. Although (100)65.8% of the isolates had MAR
index ≥0.2, (52)34.2% of the isolates had MARindex ≤ 0.2 and (65)428% of the isolates were considered multidrug resistant strains., Conclusion: The isolation of multi-drug and vancomycin intermediate resistant strains of S. aureus in high percentage, in this study, presents a great threat to clinicians and general populace. The vancomycin intermediate resistant S. aureus (VISA) in asymptomatic individuals could be a critical concern to the therapeutic dilemma to be added to the presence of multi-drug resistance. A more sustainable therapy must be in place to prevent its dissemination or the outbreak of its infection., (© 2020 Adeoye-Isijola M et al.)- Published
- 2020
- Full Text
- View/download PDF