Tiamulin feed premix in the prevention and control of swine dysentery under farm conditions in the UK

Three field trials were carried out to evaluate the efficacy of tiamulin hydrogen fumarate at levels of 20 and 30 ppm in the feed for the prevention and control of swine dysentery. Tiamulin at 30 ppm was shown to be highly effective in preventing the clinical signs of dysentery. Treponema hyodysenteriae was not isolated from these pigs. Tiamulin at 20 ppm was effective in two out of three trials. The trials were performed on pigs either on or from farms with swine dysentery problems which had proven resistant to medication with other products.