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Many other ancient cultures, including the ancient Egyptians, viagra sportswear Greeks and medieval Arabs already used molds and plants to treat infections, owing to the production of antibiotic substances by these organisms, a phenomenon known as antibiosis Quinine became widely used as a therapeutic agent in the 17th century for the treatment of malaria, the disease caused by Plasmodium falciparum, a protozoan parasite.To date, tuberculosis and pneumococcus are prominent viagra cheap canada of once easily treated infections where drug-resistance has become a problem.They are sometimes recommended by doctors, and, more frequently, by viagra lawyer ohio, after a course of antibiotics, or as part of the treatment for gut related candidiasis.While bacteriophages provide a possible solution to the problem of viagra cheap no prescription resistance, there is no clinical evidence yet that they can be deployed as therapeutic agents to cure disease.