Study of the Interactive Effect between Fosfomycin and Tylosin for Use in the Therapy and Prevention of Disease in Veterinary Medicine
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The pharmacological interaction of the combination of Fosfomycin and tylosin was studied. An in vitro challenge method was used for this purpose. The results were used to calculate their interaction using the graphical representation known as ISOBOLOGRAM. The agar well bioassay method was used. The following criteria were used to quantify the results: A synergistic effect was defined when the actual/theoretical effect (SMEF) was greater than 1. The additive effect was defined when the SMEF was equal to 1. The area between the antagonism and additive effect was defined as the zone of indifference. When studying the interaction between Fosfomycin and Tylosin, it was observed that the best SMF of this antibiotic combination was 2 : 3. This result allows postulating that the use of this combination of Fosfomycin and Tylosin establishes a well recognised and documented synergistic effect between them and can be recommended in pigs and poultry for the treatment of infections by gram + and gram - germs and other infectious agents sensitive to this combination.
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