Effects of Different Doses of Probiotic Supplementation to Diet on Performance, Organ Weight, and Some Blood Parameters in Broilers

Abstract

Objective: Probiotics are live microorganisms such as bacteria, fungi, or yeast that support the gastrointestinal flora and promote growth performance when administered in sufficient amounts. The current study was conducted to examine the impact of different doses of probiotic mix (Lactobacillus delbrueckii subsp. bulgaricus, Streptococcus thermophiles, Lactobacillus acidophilus, Lactococcus lactis, Propionibacterium) on performance, organ weights, and some blood parameters in broilers. Materials and Methods: For this aim, a total of 360 two-day-old Ross-308 mixed-sex broiler chickens were randomly divided into five groups, with six replicates containing 12 chicks per replicate. All of them were fed with five different dietary intakes for 40 days as follows: Control (Con; basal diet), Trial I (TI; 0.05% adding probiotics), TII (0.075% adding probiotics), TIII (0.10% adding probiotics), and TIV (0.125% adding probiotics). After the treatments, performance parameters and organ weights were evaluated. Also, blood specimens were collected for sero biochemical analysis. Results: Data showed that the highest body weight (BW), average daily weight gain (ADWG), and feed conversion rate (FCR) were determined in the TII group (p