The Use of Probiotic Containing Lactic Acid Bacteria to the Rescue of Antibiotics in Broiler Production

The use of Probiotic Containing Lactic Acid Bacteria to the 1 Rescue of Antibiotics in Broiler Production 2 3 4 5 ABSTRACT 6 The research was aimed to study the effect of Lactobacillus fermentum, Lactobacillus plantenrun 7 and Weissalla ciberia on growth performance, feed conversion ratio and mortality of broiler 8 chicken. This was design to find a possible alternative to antibiotics in broiler production. The 9 study was carried out at the Department of microbiology, faculty of sciences Kaduna State 10 University, Kaduna between January to April 2018. A total of ten raw milk samples were 11 screened for the isolation of Lactic Acid Bacteria (LAB) and 21 day old chicks were 12 administered probiotics (Lactobacillus fermentum, Lactobacillus plantenrun and Weissalla 13 ciberia) in water at 10cells/milliliters/isolates/birds/day for six weeks. Body Weight (BW), 14 Weight Gain (WG) and Feed Intake (FI) were measured weekly just as feed conversion ratio was 15 calculated and mortality was recorded throughout the duration of the experiment. The results 16 showed the identification of Lactobacillus fermentum, Lactobacillus plantenrun and Weissalla 17 ciberia that were used as probiotics. Significant differences was observe between treatment on 18 BW at day 14 P=0.0292 WG, P=0.0004 and FI P=0.0176, day 21 P=0.0329, WG P=0.0004 and 19 FI P=0.0176, day 28 P=0.0025, WG P=0.0053 and FI P=0.0189, day 42 WG P=0.0112 and FI 20 P=0.0006 and day 49 BW P=0.011, WG P=0.5289 and FI P=0.0006. Probiotics group showed a 21 better body weight and weight gain with a lower feed intake and highest feed conversion ratio 22 compared with antibiotic and control group. There was a progressive increase in weight gain 23 from the first to the fourth but decreases from week five and six. The LAB group recorded 5%, 24 mortality rate, antibiotics group recorded 10% and the control group recorded 0%. Probiotic 25 lactic acid bacteria showed promising tendencies to replace antibiotics in broiler production as 26 illustrated in this research work. 27

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