Effect of toltrazuril on the ceacal fermentation in rabbits.

摘要

This research was carried out on 24 Californian breed rabbits, aged 12 weeks, weighing between 1.8 and 2.2 kg, from which the caecal contents were taken and placed in fermentation in vitro. Toltrazuril at 0.15 ml was added to the contents in vessels (experimental group), which resulted in a final concentration of 25 ppm toltrazuril. In the analyses of gases obtained during fermentation, it was determined that CO2 had the most substantial percentage, above 70%; CH4 had a smaller percentage of 15% and hydrogen and hydrogen sulfide had the least considerable portion. During fermentation, the amount of the gases produced changed and the zenith of fermentation took place between the second and fourth hours of incubation. The addition of toltrazuril to the caecal contents of rabbits leads to an increase in the value of CO2:CH4 not observed in the control experiments. The addition of toltrazuril increases the hydrogen level, which may result from changes in either the composition or activity of bacteria releasing H2..