https://www.vetsurgeon.org/f/clinical-questions/8905/rhodococcus-equi-therapy-resistance Hi, Writing a thesis on R equi foal pneumonia and current therapies used by vets in different countries. In the last 10 years there has been the steady increase in resistance and therefore combination of macrolide and rifampin now used. If erythromycinen-USTelligent Community 10https://www.vetsurgeon.org/thread/42199?ContentTypeID=1Thu, 28 Jul 2011 21:10:27 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:c35d6a0d-d32e-4dee-8eed-1ff5d1b49e44Mark Hedberg<p>re: azithromycin, could it be because there&#39;s no vet licensed version of it? Cascade rules could mean you can&#39;t really use it (even though it&#39;s brilliant stuff) without trying other (licensed stuff) first.</p><div style="clear:both;"></div>