On the use of a probiotic (Bacillus subtilis - strain DSM 17299) as growth promoter in broiler diets

Abstract

The objective of this experiment was to evaluate the effect of a probiotic (Bacillus subtilis, strain DSM 17299) in broiler diets on feed intake, weight gain, and feed conversion ratio. The experiment included 1,200 male Ross broilers from 1 to 42 days of age. Birds were randomly allocated to 4 treatments, with 10 replicates of 30 birds. The following treatments were applied: T1 - Negative Control (basal diet, with no added growth promoter; T2 - Negative Control + Bacillus subtilis (8 x 10(5) CFUs/g feed); T3 - Negative Control + Bacillus subtilis (3 x 10(5) CFUs/ g de feed) and T4 - Positive Control (avilamycin + anticoccidial from 1 to 35 days of age). At 21, 35, and 42 days of age, there was an increase of antibiotic-free diet intake as compared to the diets with growth promoters (p<0.05), but there was no difference, however, as compared to the diets with probiotic as a growth promoter (p>0.05). The use of growth promoter did not improve weight gain at the studied ages. There was a marked improvement in the feed conversion ratio of broilers fed the diet with antibiotics and of broilers fed the diet with added B. subtilis. It is concluded that the Bacillus subtilis probiotic can be used as a growth promoter in broiler diets

Effect ofBacillus SubtilisSpore (GalliPro®) Nutrients Equivalency Value on Broiler Chicken Performance

“…This result was in agreement with outcomes of Zhang and Kim (2014), Amerah et al (2013), Toghyani et al (2011), andOpalinski et al (2007). Amerah et al (2013) reported that probiotic supplementation reduced FI and improved FCR with no effect on weight gain throughout the trial, indicating that the probiotic indeed exerted some beneficial effect on broilers.…”

Evaluation of the use of probiotic (Bacillus subtilis C-3102) as additive to improve performance in broiler chicken diets

“…These results were partly different from those found by Brito et al (2005), Opalinski et al (2007) and Meurer et al (2010), who observed better performance in broilers fed both diets supplemented with the additives (AGP or BS) alone and combined. Rigobelo et al (2008) found better feed conversion in broilers fed probiotic or AGP-supplemented diets when compared with the broilers in the negative control group.…”

A Trial to Prevent Salmonella Enteritidis Infection in Broiler Chickens Using Autogenous Bacterin Compared with Probiotic Preparation

“…on bird's performance in case of absence of enteric infections revealed that these compounds are effective as they improve the growth of the broiler chickens (Mohan et al, 1996;Jin et al, 1998;Zulkifli et al, 2000;Kalvathy et al, 2003;Gracia et al, 2004;Huang et al, 2004;Opalinski et al, 2007;Midilli et al, 2009). On the other hand, Angle et al, (2005) found no improvement in performance but there were increased protein, calcium and phosphorus retention.…”