Tulathromycin A is a macrolide antibiotic that inhibits bacterial protein synthesis (IC50 = 0.26 µM) by targeting the 50S ribosomal subunit, blocking the progression of nascent polypeptide chains. It is effective against M. haemolytica and P. multocida (MICs = 2 and 0.5 µg/ml, respectively), which cause respiratory...