Inhibition of the Vancomycin Resistance in Staphylococcus aureus in Egypt Using Silver Nanoparticles

Figure 1

Phenotypic methods for identification of the studied S. aureus. (a) Growth on mannitol salt agar showed golden-yellow colonies. (b) Gram stain showed purple cells arranged in grape-like clusters. (c) Catalase test resulted in effervescence after the addition of hydrogen peroxide to the fresh growth of staphylococci. (d) DNase test using the toluidine blue indicator resulted in pink hallows around the colonies and a negative result for the control (S. epidermidis).

(a)

(b)

(c)

(d)