A combination preparation based on antibiotic, cluster silver and bacteriophage for treatment of infectious diseases caused by <i>Staphylococcus aureus</i> and <i>S. aureus</i> MRSA

Abstract

The problems of bacterial infections in medicine and veterinary medicine require careful study and rapid solution. Due to continuous and, in some cases, irrational use of antibiotics, the efficiency of their effect on host has been noticeably decreasing; moreover, resistance to antibacterial drugs is steadily growing, antibiotic-resistant strains emerge, which are not amenable to conventional medical treatment. The unprecedented rise of pathogenic bacteria resistance to antibiotics requires generation of new drugs to combat them. One of the ways to increase the effectiveness of antibiotic therapy is to use combination drugs. Combination dosage forms provide an increased therapeutic effect and should not be toxic to the body. To overcome the microbial resistance reducing host burden of antibiotics, we proposed a combination preparation based on antibiotic, cluster silver and specific bacteriophage for treatment of infectious diseases caused by S. aureus, including MRSA strains. Each component has already proven in the treatment of pathogen-caused infectious diseases. But while using this combination agent, it became possible to reduce the amount of antibiotic and get rid of antibiotic-resistant and phage-resistant forms of bacteria. The study showed the effectiveness of the combination preparation on S. aureus MRSA bacteria, while reducing the amount of antibiotics in proposed composition by 24 times compared to use of antibiotic alone. The efficacy of the preparation containing was as follows: 10 mg/ml gentamicin, 7 mg/ml cluster silver and 106 BOV/ml bacteriophage, on S. aureus MRSA bacteria in suspension is comparable to the effectiveness of gentamicin with a concentration of 40 mg/ml. For S. aureus 209 and S. aureus ssp. bacteria with reduced resistance to antibiotics, the use of two-component compositions (antibiotic + cluster silver; antibiotic + bacteriophage) also allowed to reduce the antibiotic concentration by 23 times. It should be noted that with a constant amount of antibiotic, increasing the amount of cluster silver by 45 times, there is a rise in bactericidal properties of the resulting preparations. Repeated introduction of drug dose allows to achieve a marked decrease in level of pathogenic microorganisms in the suspension studied. This drug has no limitations depending on the state and degree of microbial resistance.