| retrospective comparison of azithromycin, clarithromycin, and erythromycin for the treatment of foals with rhodococcus equi pneumonia. | the objective of this retrospective study was to compare the efficacy of azithromycin-rifampin, clarithromycin-rifampin, and erythromycin-rifampin for the treatment of pneumonia caused by rhodococcus equi in foals. eighty-one foals with naturally acquired pneumonia caused by r. equi were included in the study. information on age, sex, breed, physical examination findings, laboratory testing, and thoracic radiography was abstracted from each medical record. foals were divided in 3 groups based on ... | 2004 | 15320600 |