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Effects of the Combination of Bacillus licheniformis and Saccharomyces cerevisiae on Blood Profile, Immune Organs, Carcass Characteristics, and Intestinal Health of Broiler Chickens Challenged with Escherichia coli
The poultry industry faces ongoing challenges from bacterial infections. Probiotics have emerged as a promising strategy to improve the performance and health of animals. The current research aimed to evaluate the effectiveness of the combination of Bacillus licheniformis and Saccharomyces cerevisiae on blood profile, immune organs, carcass characteristics, and intestinal health in broiler chickens exposed to Escherichia coli (E. coli). This study involved the random assignment of 100 male Cobb 500 broiler chicks aged one day, raised for 35 days, each with an average weight of 44.26 ± 1.89g, to four oral treatments. There were four groups, each group consisting of five replications, and each replication consisting of five chickens. T1, the control group, received a basal diet. T2 received B. licheniformis (5×109CFU per 2g), administered at a level of 2g per 1000g of basal diet. T3 received S. cerevisiae (1.0 ×10 10CFU per 2g), administered at a level of 2g per 1000g of basal diet. T4 received a combination of B. licheniformis (5×10 9CFU/g) and S. cerevisiae )1.0 × 1010CFU/g), with each probiotic administered at a level of 1g per 1000g of basal diet. The data of blood profile parameters, including electrolytes, leukocytes, total protein of plasma (TPP), fibrinogen, hemoglobin, LDL, HDL, triglycerides, and cholesterol, indicated a notable disparity between the control group and the group receiving the combination of Bacillus licheniformis and Saccharomyces cerevisiae, with the control group exhibiting lower values for these parameters compared to the combination group. Total bacteria counts before and after the challenge showed fewer colonies of E. coli in the group that received the combination of Bacillus licheniformis and Saccharomyces cerevisiae. The weights of carcass parts (breast, wing, and thigh) and immune organs (spleen, Bursa Fabricius, and intestine) were all significantly lower in the control group compared to the group administered a combination of Bacillus licheniformis and Saccharomyces cerevisiae. These results indicated that the supplementation of Bacillus licheniformis and Saccharomyces cerevisiae to broiler chickens exposed to E. coli increased their parameters of blood profile, immune system, carcass features, and intestinal health. © The Author(s) 2025. This article is licensed under a Creative Commons Attribution 4.0 International License https://creativecommons.org/licenses/by/4.0/.
Effects of the Combination of Bacillus licheniformis and Saccharomyces cerevisiae on Blood Profile, Immune Organs, Carcass Characteristics, and Intestinal Health of Broiler Chickens Challenged with Escherichia coli (Text)
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