Virginiamycin for prevention of swine dysentery
Miller, C.R.; Philip, J.R.; Free, S.M.; Landis, L.M.
Veterinary Medicine-Small Animal Clinician 67(11): 1246-1248
1972
ISSN/ISBN: 0042-4889 PMID: 4564020 Document Number: 49288
Six groups, each of 12 pigs, were placed on a ration containing 25, 50 or 100 g/ton of virginiamycin or tylosin. After a week all the pigs, as well as 24 controls, were given by stomach tube a suspension of infected pigs' colons. The great majority of pigs fed virginiamycin remained healthy, but the others developed diarrhoea, though those fed tylosin had better weight gains and food efficiency than controls. The mortality rate was 30% in pigs fed tylosin and 29% in controls, while none of those fed virginiamycin died. There was no dose-response relationship for either antibiotic.