Clinical efficacy of acetylsalicylic acid as an adjunct to antibacterial treatment of porcine respiratory disease complex

Materials and methods: The animals were divided into two groups. The experimental group received doxycycline hyclate and ASA in the drinking water for 5 consecutive days at doses of 10 mg per kg and 100 mg per kg of body weight, respectively, whereas the control group received only doxycycline hyclate (10 mg per kg). Clinical efficacy was investigated by comparing the synergistic or antagonistic effects of ASA administered with an antibiotic versus use of the antibiotic alone to reduce fever or clinical signs or both.