Reference | Abou.Youssef_1983_Poulscie (10219)

The purpose of the following study was to determine the effect of virginiamycin on the duration and persistence of experimentally induced Salmonella typhimurium infections in broilers. In addition, the effect of virginiamycin on the antibiotic resistance patterns of Salmonella typhimurium isolated from the alimentary tract was also determined. Broiler chicks were obtained from a commercial hatchery at one day of age. They were divided into Group A (20 chickens) and Group B (20 chickens) Group A served as an infected control. Group B, which was housed in a room separate from Group A, received virginiamycin incorporated in the ration at levels of 25 g/ton 5 days prior to infection with Salmonella typhimurium and throughout the experimental period of 56 days. All chicks from Groups A and B were inoculated with Salmonella typhimurium RG- 1471.

Fecal samples were taken at periodic intervals from day 2 to 56 postinoculation and the quantity of Salmonella spp. determined.

AST Method: Disk Diffusion

Reference explicitly reports AST breakpoints: False

Reference reports using a MIC table: False