Comparative efficacy of spray-dried plasma and bacitracin methylene disalicylate in reducing cecal colonization by Salmonella Enteritidis in broiler chickens
| Autor: | Peter R. Ferket, Temitayo Obanla, Y. O. Fasina, Devendra H. Shah |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Litter (animal)
Salmonella food.ingredient MICROBIOLOGY AND FOOD SAFETY bacitracin methylene disalicylate Bacitracin medicine.disease_cause Feed conversion ratio SF1-1100 spray-dried plasma Animal science food medicine Agar Animals Cecum broiler chickens Meal Chemistry Broiler General Medicine Factorial experiment Animal Feed Diet Animal culture Salmonella enteritidis Salmonella spp Animal Science and Zoology Chickens medicine.drug |
| Zdroj: | Poultry Science, Vol 100, Iss 7, Pp 101134-(2021) Poultry Science |
| ISSN: | 0032-5791 |
| Popis: | Spray-dried plasma (SDP) contains immunoglobulins and glycoproteins that possess antibacterial properties. Two floor-pen trials were conducted to determine the efficacy of dietary SDP and bacitracin methylene disalicylate (BMD) antibiotic in reducing intestinal colonization by Salmonella Enteritidis (SE) in broiler chickens. Experiment 1 was a 2-wk, 3 × 2 factorial design consisting of 6 treatments. Treatment CON consisted of chicks fed unmedicated corn-soybean meal (SBM) basal without SDP. Treatment BMD consisted of chicks given unmedicated corn-SBM basal into which BMD was added at 0.055g/kg diet. Treatment SDP consisted of chicks given unmedicated corn-SBM basal into which SDP was added at 30g/kg diet. Treatments CON-SE, BMD-SE, and SDP-SE consisted of chicks that were given diets similar to CON, BMD, and SDP, respectively, and were each inoculated with 7.46 × 108 CFU SE /mL at 1 day of age. Experiment 2 was a 42-day trial that was similar to Experiment 1 in design, except that chicks were placed on fresh clean litter. On d 3, 7, 14, and 28 post-challenge (PC), ceca SE concentration was enumerated on xylose lysine tergitol-4 (XLT4) agar. Body weight gain (BWG) and feed conversion ratio (FCR) were also recorded. Results for d 3 showed that BMD- and SDP-fed chicks had similar (P > 0.05) cecal SE (3.39 log 10 CFU / g and 3.58 log 10 CFU / g, respectively), but these levels were lower (P < 0.05) than that of CON-fed chicks (5.68 log 10 CFU / g). A similar trend was observed on d 7 and 14 PC. The BMD- and SDP-fed chicks also had higher BWG and FCR (P < 0.05) when compared with CON-fed chicks up to d 14. Thereafter, only BMD treatment sustained this growth-promoting effect till d 42 in SE-challenged birds. In conclusion, BMD and SDP showed similar efficacy in reducing cecal Salmonella and in mitigating consequent growth-depressing effect(s) in broiler chicks up to 2 wk of age. |
| Databáze: | OpenAIRE |
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