... , M. haemolytica is more sensitive than P. multocida to tilmicosin. Other gram-negative organisms tested, including Enterobacter aerogenes, Escherichia coli ... strains of Actinomyces also are extremely resistant to tilmicosin.Pigs: Tilmicosin for medicated feed is indicated in the control of ... between 4 and 20 °C (59 and 86 °F). tilmicosin premix, veterinary drugs, animal drugs,18 years GMP supply