Abstract
Combinations of probiotic microorganisms are the study of interest due to beneficial impact through synergistic actions. Several researchers including our previous result found positive effects of various combinations of probiotic inclusion in broiler diet. In the current study, the efficacy of combinations of probiotic organisms by adding Rhodopseudomonas spp. was the primary interest on growth performance, mortality, immunity and cecal microflora in broilers. According to the completely randomized design, three hundred day-old Ross broiler chicks (initial BW, 45.08 ± 0.79 g) were randomly allocated to three dietary treatments with ten replications of 10 birds per replicate. Broilers were reared for 5 weeks, where experimental diets were provided for starter (0 to 3 weeks) and finisher (4 to 5 weeks) period. The dietary treatments were, CON = control (corn-soybean meal based basal diet); ABT = basal diet + chlortetracycline-HCl; RCMP = basal diet + multi-microbe probiotic, (Bacillus spp. + Lactobacillus spp. + Saccharomyces spp. + Rhodopseudomonas spp.). Present study revealed that, dietary supplementation of RCMP significantly improved overall average daily gain and feed conversion ratio compared to CON (P 0.05). Moreover, cecal pathogenic Escherichia coli and Salmonella was significantly suppressed in RCMP and ABT supplemented group compared to CON (P 0.05). Thus, dietary supplementation of Rhodopseudomonas-based multi-microbe probiotic (RCMP) has the potentiality to be used as effective feed additives in broilers. Key words: Broilers, multi-microbe probiotic combinations, immunity, mortality, performance.
Highlights
The use of antibiotics as prophylactic and growth promoting compounds has long been practiced in commercial poultry farming
Cecal pathogenic Escherichia coli and Salmonella was significantly suppressed in Rhodopseudomonas containing multi-microbe probiotic combinations (RCMP) and ABT supplemented group compared to CON (P0.05)
Dietary supplementation of Rhodopseudomonas-based multi-microbe probiotic (RCMP) has the potentiality to be used as effective feed additives in broilers
Summary
The use of antibiotics as prophylactic and growth promoting compounds has long been practiced in commercial poultry farming. Probiotics are commonly known as the mono or mixed cultures of living microorganisms that exerts beneficial effects on the host by balancing indigenous microbial population (Fuller, 1992; Havenaar et al, 1992) They have beneficial effects on growth performance (Kabir, 2009), health of the host (Guarner et al, 2003), increase nutrient digestibility (Mountzouris et al, 2010), modulate intestinal microflora (Teo and Tan, 2007), and facilitate development of humoral immunity (Waititu et al, 2014). Addition of purple non-sulphur microorganism Rhodopseudomonas with Bacillus, Lactobacillus and Saccharomyces probiotic bacteria would synergistically improve the growth performance, immunity; reduce the mortality and modulate the cecal microflora through microbial balance and nutrient utilization in broilers. The present study was conducted to investigate the efficacy of Rhodopseudomonas containing multi-microbe combinations (RCMP) on growth performance, mortality, immunity and cecal microflora in broilers
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