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The effects of the supplementation of Bacillus subtilis RX 7 and B2A strains on the performance, blood profiles, intestinal Salmonella concentration, noxious gas emission, organ weight and breast meat quality of broiler challenged with Salmonella typhimurium
Author(s) -
Park J. H.,
Kim I. H.
Publication year - 2015
Publication title -
journal of animal physiology and animal nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.651
H-Index - 56
eISSN - 1439-0396
pISSN - 0931-2439
DOI - 10.1111/jpn.12248
Subject(s) - bacillus subtilis , virginiamycin , biology , zoology , population , salmonella , microbiology and biotechnology , food science , bacteria , antibiotics , medicine , genetics , environmental health
Summary An experiment was conducted to evaluate the effects of B. subtilis RX 7 and B. subtilis B2A on growth performance, blood profiles, intestinal Salmonella population, noxious gas emission, organ weight and breast meat quality of broilers under S . typhimurium challenge. A total of 120, one‐day‐old Ross 308 male broiler chicks were assigned to four dietary treatments, composed of six replications, with five birds per replication, for 10 day. The dietary treatment groups were negative control (NC; no antibiotic, no B. subtilis ), positive control ( PC ; NC + 0.1% virginiamycin), B. subtilis RX 7 ( NC + 0.1% B. subtilis RX 7 1.0 × 10 9 cfu/g) and B. subtilis B2A ( NC + 0.1% B. subtilis 1.0 × 10 9 cfu/g). All birds were orally challenged with 2 ml suspension, containing 10 4 cfu/ml of S. typhimurium KCCM 40253. Results indicated that the body weight gain, feed intake and feed conversion did not differ, among all comparative treatments. Serum haptoglobin concentration was lower in Bacillus treatments (RX7 + B2A) than the NC treatment (p < 0.05). Intestinal and excreta Salmonella number, and excreta ammonia gas emission in the PC treatment or Bacillus treatments, was lower than the NC treatment (p < 0.05). Breast pH , colour and water‐holding capacity were not affected by supplementation of B. subtilis RX 7 and B2A. However, drip loss at 1 day post‐slaughter from birds fed with B. subtilis RX 7 and B2A decreased, compared with the positive control birds (p < 0.05). Relative gizzard weights of birds fed B. subtilis RX 7 and B2A were significantly higher than the NC birds under S. typhimurium challenge. It is concluded from the results that B. subtilis RX 7 and B2A increased the gizzard weight and decreased the intestinal and excreta Salmonella population and excreta ammonia gas, and drip loss of breast meat after being stored for 1 day, under stress caused by the S. typhimurium challenge.