University of Veterinary Science

About: University of Veterinary Science is a education organization based out in Pyinmana, Myanmar. It is known for research contribution in the topics: Population & Feed conversion ratio. The organization has 597 authors who have published 650 publications receiving 14262 citations.

Epidemiology of Salmonella derby strains isolated from swine, pork and pork products.

Abstract: A total of 35 Salmonella derby strains, isolated from 6 types of samples of porcine origin from 9 different places in Hungary were examined for their characteristics. Thirty-two strains (91%) were of phage type 25, 2 (6%) of phage type 15 and 1 (3%) of phage type 58. Colicin production was observed in 3 (9%) strains. Five strains (14%) were found to be resistant to tetracycline (Tc). The strains harboured plasmids of 2.2, 2.4, 3.4, 4.2 and 72 Md. The 72 Md plasmid appears to be characteristic of S. derby and possibly encodes Tc resistance. The 72 Md plasmid belonged partly to incompatibility (Inc) group I1, while the other plasmid of the same size belonged to Inc. group B. The findings suggest that healthy salmonella carrier pigs carried the infection from the farm to the abattoir. Slaughtering of infected pigs may have led to contamination of the carcasses and, thereafter, that of the pork and pork products.

Cooled storage of canine semen: in vitro effects of different concentrations of an antibiotic combination on growth of mollicutes.

Abstract: Contents The aim of this study was to examine effects of an antibiotic combination at different concentrations on growth of mycoplasma and ureaplasma during cooled storage of canine semen (n = 20). Semen aliquots were diluted with Tris–citric acid–fructose–egg yolk extender containing either 1.0 g/l streptomycin and 0.6 g/l benzylpenicillin (control) or a combination of gentamycin, tylosin, lincomycin and spectinomycin (GTLS-1: 0.25, 0.05, 0.15 and 0.3; GTLS-2: 0.5, 0.1, 0.3 and 0.6; GTLS-3: 1.0, 0.2, 0.6 and 1.2 g/l). Samples were assessed for motility and membrane integrity by computer-assisted sperm analysis immediately after dilution and at 24, 48 and 72 h of cooled storage. Morphologically, normal spermatozoa were determined, and bacterial culture was performed at 24 and 72 h. Mycoplasma spp. were detected in 14 of 20 ejaculates (70%) with severe growth in 12 samples. A reduction but not total elimination of mycoplasma growth occurred in all GTLS extenders with the most pronounced reduction in group GTLS-3 (control vs GTLS-1 and GTLS-2 p < 0.05, control vs GTLS-3 p < 0.001). Ureaplasmas were detected in four ejaculates, and growth was reduced to the same extent in GTLS and control extender. Progressive motility in all groups, total motility in groups GTLS 1–3 and percentage of membrane-intact spermatozoa in groups GTLS 2 and 3 decreased slightly (p < 0.05) over time. In conclusion, dilution of canine semen with GTLS extender has no major detrimental effects on spermatozoa during cooled storage. It reduced the growth but did not totally eliminate mycoplasmas and ureaplasmas from cooled-stored dog semen.

Rapid Decrease of the Peripheral Deiodination of Thyroxine in Malabsorption Syndrome in Artificially Inoculated Broilers

Abstract: Thyroid function of broilers inoculated with the intestinal homogenate from birds from a field case of malabsorption syndrome was investigated during the first 2 days postinoculation. In one experiment, different amounts of the inoculum were applied to see if there exists a dose-response relationship. As early as 3 hours after inoculation, there was a significant drop in the serum level of triiodothyronine and in the activity of the liver 5'-deiodinase (type I). Type II deiodinase activity was less impaired. A minimum of 0.3 ml of inoculum was effective, whereas 0.05 ml of the same homogenate elicited a significant (P less than 0.01) drop in liver deiodinase activity. These findings underline the importance of thyroid impairment in the pathogenesis of malabsorption syndrome.