Journal
LETTERS IN APPLIED MICROBIOLOGY
Volume 67, Issue 2, Pages 205-211Publisher
WILEY
DOI: 10.1111/lam.13017
Keywords
blood derivative; Salmonella choleraesuis; Salmonella typhimurium; spray-drying; storage conditions
Categories
Funding
- Secretaria de Universitats i Recerca del Departament d'Economia i Coneixement de la Generalitat de Catalunya [2014 DI 066]
- CERCA Programme (Generalitat de Catalunya)
Ask authors/readers for more resources
The objective of this study was to determine the effectiveness of the spray-drying process on the inactivation of Salmonella choleraesuis and Salmonella typhimurium spiked in liquid porcine plasma and to test the additive effect of immediate postdrying storage. Commercial spray-dried porcine plasma was sterilized by irradiation and then reconstituted (1:9) with sterile water. Aliquots of reconstituted plasma were inoculated with either S.choleraesuis or S.typhimurium, subjected to spray-drying at an inlet temperature of 200 degrees C and an outlet temperature of either 71 or 80 degrees C, and each spray-drying temperature combinations were subjected to either 0, 30 or 60s of residence time (RT) as a simulation of residence time typical of commercial dryers. Spray-dried samples were stored at either 4030 degrees C or 230 +/- 03 degrees C for 15days. Bacterial counts of each Salmonella spp., were completed for all samples. For both Salmonella spp., spray-drying at both outlet temperatures reduced bacterial counts about 3 logs at RT 0s, while there was about a 55 log reduction at RT 60s. Storage of all dried samples at either 40 +/- 30 degrees C or 230 +/- 03 degrees C for 15days eliminate all detectable bacterial counts of both Salmonella spp. Significance and Impact of the StudySafety of raw materials from animal origin like spray-dried porcine plasma (SDPP) may be a concern for the swine industry. Spray-drying process and postdrying storage are good inactivation steps to reduce the bacterial load of Salmonella choleraesuis and Salmonella typhimurium. For both Salmonella spp., spray-drying at 71 degrees C or 80 degrees C outlet temperatures reduced bacterial counts about 3 log at residence time (RT) 0s, while there was about a 5.5 log reduction at RT 60s. Storage of all dried samples at either 4.0 +/- 3.0 degrees C or 23.0 +/- 0.3 degrees C for 15days was effective for eliminating detectable bacterial counts of both Salmonella spp.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available