Abstract
Bacteriophages present alternatives to antibiotics. In the age of superbugs and antibiotic resistance, the field of medicine is trying to create new antibiotics or derivatives of the old ones to eliminate bacterial infections. Bacteriophages are specific to a certain type of bacterial species and effectively kill the bacteria of target. In order to effectively use the bacteriophages as medicine, their possible side effects should be properly analyzed and one of those includes their activities on the immune system cells. In this study, we isolated two new Escherichia coli bacteriophages and tested their effect on the activation state of the mammalian macrophages. The bacteriophages were host specific and had substantial adsorption rates on E. coli. Moreover, they were able to effectively stimulate the macrophages in the absence of a bacterial stimulant, lipopolysaccharides. This implies that these bacteriophages can be used against E. coli infections in which proper immune system activation is missing. This study is the first one to our knowledge specifically showing the immunostimulatory effect of newly isolated E. coli bacteriophages on the macrophages. It is important to determine the effect of bacteriophages on the immune system cells before their use as antibiotics.
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