A study conducted by Dr. Dean D. Concepcion, Dr. Lee G. Verzosa, and Registered Massage Therapist Jose Jurel M. Nuevo of the Fatima Eye Center in Fatima Medical Center, Valenzuela City, Philippines entitled, “Antimicrobial potency of colloidal silver compared with antibiotic eye drops” was published in Philippine Journal of Ophthalmology.
The objective is to determined the antimicrobial potency of colloidal silver against Escherichia coli, Staphylococcus epidermidis, Staphylococcus aureus, and Bacillus subtilis compared with that of tobramycin, lomefloxacin, and moxifloxacin eye drops.
The results were 22-mm zones of inhibition in the Kirby Bauer were observed in the 30 ppm preparation of colloidal silver for both S. aureus and B. subtilis, showing strong inhibitory activity compared with ampicillin (16 mm and 10 mm respectively). A 12-mm zone of inhibition was measured for S. epidermidis, showing slight inhibitory activity. ABAT showed that E. coli, S. epidermidis, S. aureus , and B. subtilis were resistant to the different concentrations of colloidal silver but sensitive to ampicillin, tobramycin, lomefloxacin, and moxifloxacin.
They have concluded that in Kirby Bauer disc-diffusion test demonstrated that S. epidermidis, S. aureus, and B. subtilis were sensitive to the 30-ppm concentration of colloidal silver. On the other hand, ABAT yielded negative results for colloidal silver at 10, 20, 30 ppm when tested against these organisms. Further, they have concluded that the study supports findings in previous studies that silver effectively inhibits the growth of these organisms, making colloidal silver an effective antimicrobial.
They believe that the conflicting results regarding the antimicrobial activity of colloidal silver may be due to differences in study design and factors affecting the stability of the colloidal silver solution. Thus, this suggests that their laboratory technique may have contributed to the negative results in ABAT.
This clearly demonstrates the antimicrobial potency of colloidal silver against these organisms. Despite of the many studies conducted by the proponents of colloidal silver, the government, the main stream media, some medical doctors, and the pharmaceutical companies do not support or even recommend the use of colloidal silver as treatment to illnesses caused by viruses, bacteria, fungi, and one-celled organisms. The reason? It all boils down to money.
Source: Philippine Journal of Ophthalmology, Philippine Academy of Ophthalmology. Last Accessed: December 27, 2014. View the article screenshot here. Photo credit: Google Search, Collin County Community College District.