Fig. 4.
Effect of Eimeria spp. challenge and methionine supplementation on nitrite, NO2− content and thiobarbituric acid reactive substances, TBARS content in the jejunum of broiler chickens 144 h post-inoculation. Results are presented as mean and standard error. a,b Different letters represent significant differences by the Tukey test, P < 0.05. UC = unchallenged broilers; EC = Eimeria-challenged broilers; NS = non-supplemented diet; dl-Met = diet supplemented with free methionine; dl-MMet = diet supplemented with methionine dipeptide