Efficacy of virginiamycin as a prophylactic drug to prevent swine dysentery

Forty-eight feeder pigs were used in an experiment to determine Virginiamycin\u27s effectiveness in preventing swine dysentery. Thirteen of 24 controls and one of 24 that received the antibiotic at either 25 or 50 grams per ton of feed died of swine dysentery or complications. Feed conversion ratio was markedly improved by the antibiotic. Virginiamycin was judged effective in preventing clinical cases of swine dysentery, but it has not been cleared for use in swine. Swine dysentery, also known as bloody dysentery, vibrionic dysentery, bloody scours, or black scours, is a infectious, enteric disease of swine. It is serious in many areas of the Midwest and is assumed to be present wherever swine are raised in the United States. For years the etiology of the condition was thought to be Vibrio coli; however, recent work has indicated Treponema hyodysenterrae-instead.; Swine Day, Manhattan, KS, November, 197

Comparison of oral iron and injectable iron for the prevention of iron deficiency anemia in baby pigs

One of two oral iron compounds or an injectable iron (100 mg iron per treatment) were administered to pigs on d 1 and 15 postfarrowing, and they were compared with untreated littermates. There was no significant difference between the pigs receiving the oral iron and the negative controls in serum iron or total iron binding capacity. Pigs that received iron by injection had higher serum iron and packed cell volume and a lower total iron binding capacity compared with pigs given oral iron or untreated controls.; Swine Day, Manhattan, KS, November 19, 199

Iron dextran and iron dextran-gentamycin combined, compared as methods of preventing iron-deficiency anemia in neonatal pigs

Giving an iron iron dextran-gentamycin combination to young pigs had no advantages over giving them iron dextran alone, as measured by hemoglobin levels, packed cell volumes, or weight (when 28 days old).; Swine Day, Manhattan, KS, November 10, 197

Transfer of fatty acids across the swine uterus and placenta

The transfer across the swine uterus and placenta of [1-14C] octanoic acid, [9,10(n)- H] palmitic acid, and [1- 14C] linoleic acid was studied in five gilts and their fetuses during late gestation, following a single bolus injection. Only trace amounts of labeled fatty acids were found in fetal plasma lipid. There were no measureable differences in free fatty acids (FFA) from umbilical artery, and veinous blood. Concentration of FFA in fetal blood was about 40% of the level of uterine values (187, 194, 73, and 82 µEg/1 for uterine artery, uterine vein, umbilical artery, and umbilical vein). In addition, fetal plasma contained larger amounts of 14:0, 16:1, 18:1, and 20:4, whereas maternal plasma contained larger amounts of 18:0 and 18:2. These results indicate that only trace amounts of FFA cross the swine utero-placental unit during late gestation, which are probably not enough to increase energy supply or lipid storage of the fetus.; Swine Day, Manhattan, KS, November 21, 198