The effects of dietary supplementation with different levels of Microzist as newly developed probiotics on growth performance, carcass characteristics, and immunological organs of broiler chicks

Abstract

The current research was conducted to evaluate the influence of newly developed probiotic (Microzist) and commercial probiotic (Primalac) on growth performance, carcass characteristics, and immunity of broiler chickens. A total of 225 one-day-old broiler chicks Ross-308 was randomly assigned into 5 groups -control group, group with 0.2, 0.25, and 0.3 g/kg of Microzist, and group constituting Primalac (starter: 0.9 g/kg, grower: 0.454 g/kg, and finisher: 0.225 g/kg). At 42 nd day of age, there were no statistically significant differences among treatments on daily weight gain and feed conversion ratio (P > .05), but treatment's effect on the feed intake was found to be significant (P < .05). Diet supplementation with various concentrations of Microzist showed growth performance of broiler chickens more or less similar to the Primalac additives. There were statistically significant differences (P < .05) among treatments on the carcass characteristics. Microzist (0.2 g/kg) reduced the abdominal fat content in broiler chickens in a comparison with control as well as Primalac (P < .05). Furthermore, Microzist showed no influence on the immunological organ weights. The present investigation indicates that Microzist may be a potential alternative to antibiotic growth promoters as well as widely used Primalac in broiler industries. ARTICLE HISTORY

Dietary supplementation of powdered and encapsulated probiotic: In vivo study on relative carcass, giblet weight and intestinal morphometry of local duck

“…Statistical analysis of gizzard and heart weight showed there was no significant (p > 0.05) difference between experimental groups. This indicated that inclusion of probiotic and their combination did not stimulate the internal organ weight (Parsa et al, 2018). This finding was in line with (Shabani, Nosrati, Javandel, & Kioumarsi, 2012) that different level of probiotics had no statistically effect on gizzard weight.…”

Characterization of Lactic Acid Bacteria Isolated From the Gastrointestinal Tract of a Wild Boar as Potential Probiotics

“…Moreover, the administration of probiotics to dairy calves results in improvement daily weight gain and resolution of diarrhea (17). Similar results have also been reported in other animals, including poultry (2,18), ostriches (19), raccoon dogs (20), and silver foxes (20). LAB have widely been applied in animal feed.…”

Effects of the Probiotic Mixture Slab51® (SivoMixx®) as Food Supplement in Healthy Dogs: Evaluation of Fecal Microbiota, Clinical Parameters and Immune Function

“…Not all growth-promoting effects are mediated by bacterial metabolites or active colonization of the gastrointestinal tract, and inactivated or live probiotics had a similar performance, superior to the other commonly used growth promoter, as zinc bacitracin ( 1 ). Similar results and conclusions were reported by other authors, demonstrating any significant differences on the influences of probiotic supplementation on lymphoid organs weights ( 2 ). In this optic our approach for this study was to evaluate the impact of live and concentrated probiotic bacteria on systemic and mucosal immune-response in healthy dogs, evaluating directly immunoglobulin concentration.…”