The effect of two dehydration technologies, spray-drying and freeze-drying, on the viability of 12 lactic acid bacteria (LAB) were compared. All LAB cultures had been previously isolated from porcine blood and were candidates to be used as biopreservatives in order to maintain the quality of porcine blood until further processing to obtain added-value blood derivatives is carried out. The residual viability and the reductions in microbial counts in dried LAB samples at 20 °C and 5 °C during 60-day storage were determined. Cellular damage due to freeze-drying was observed immediately after drying whereas cellular damage due to spray-drying did not become evident until the subsequent phase of storage. For most of the strains, the faster decrease in viability of spray-dried as compared to freeze-dried cultures was compensated by the higher percentage of viable cells obtained after dehydration, leading to comparable survival rates at the end of the storage period. Dehydration resulted in a good alternative to freezing at 80 °C for preservation purposes. Spray-drying has been shown to be as suitable as freeze-drying for preserving LAB strains during a 2-month storage period. Results suggest the possibility of achieving a good formulation system for the LAB strains with a high number of viable cells to be used for the industrial development of bioprotective cultures.
Abd El-Gawad I.A. , Metwally M.M. , El-Nockrashy S.A. and Ahmed K.E. (1989). Spray-drying of lactic acid cultures: the effect of culture conditions and storage on microorganisms survival . Egyptian Journal of Dairy Science17: 273–281 .
2.
Boumahdi M. , Mary P. and Hornez J.-P. (1999). Influence of growth phases and desiccation on the degrees of unsaturation of fatty acids and the survival rates of rhizobia . Journal of Applied Microbiology87: 611–619 .
3.
Brennan M. , Wanismail B. , Johnson M.C. and Ray B. (1986). Cellular damage in dried Lactobacillus acidophilus . Journal of Food Protection49: 47–53 .
4.
Carretero C. and Parès D. (2000). Improvement of the microbiological quality of blood plasma for human consumption purposes. In: Pandalai S.G. (ed.), Recent Research Developments in Agricultural & Food Chemistry,Vol. 4. Trivandrum, India: Research Singpost , pp. 203–216.
5.
Carvalho A.S. , Silva J. , Ho P. , Teixeira P. , Malcata F.X. and Gibbs P. (2002). Effect of additives on survival of freeze-dried Lactobacillus plantarum and Lactobacillus rhamnosus during storage . Biotechnology Letters24 (19): 1587–1591 .
6.
Carvalho A.S. , Silva J. , Ho P. , Teixeira P. , Malcata F.X. and Gibbs P. (2004). Relevant factors for the preparation of freeze-dried lactic acid bacteria . International Dairy Journal14(10): 835–847 .
7.
Castro H.P. , Teixeira P.M. and Kirby R. (1997). Evidence of membrane damage in Lactobacillus bulgaricus following freeze-drying . Journal of Applied Microbiology82: 87–94 .
8.
Conrad P.B. , Millar D.P. , Cielenski P.R. and Pablo J.J. (2000). Stabilization and preservation of Lactobacillus acidophilusin saccharide matrices . Cryobiology41: 17–24 .
9.
Corcoran B.M. , Ross R.P. , Fitzgerald G.F. , Stanton C. (2004). Comparative survival of probiotic lactobacilli spray-dried in the presence of prebiotic substances . Journal of Applied Microbiology96(5): 1024–1039 (16)
10.
Costa E. , Teixidó N. , Usall J. , Fons E. , Gimeno V. , Delgado J. and ViÒas I. (2002). Survival of Pantoea agglomerans strain CPA-2 in a spray-drying process . Journal of Food Protection65(1): 185–191 .
11.
Costa E. , Usall J. , Teixidó N. , Garcia N. and ViÒas I. (2000). Effect of protective agents, rehydration media and initial cell concentration on viability of Pantoea agglomeransstrain CPA-2 subjected to freeze-drying . Journal of Applied Microbiology89: 793–800 .
12.
Desmond C. , Stanton C. , Fitzgerald G.F. , Collins K. and Ross R.P. (2001). Environmental adaptations of probiotic lactobacilli towards improvement of performance during spray drying . International Dairy Journal11: 801–808 .
13.
Espina F. and Packard V.S. (1979). Survival of Lactobacillus acidophilus in spray-drying process . Journal of Food Protection42(2): 149–152 .
14.
Fonseca F. , Beal C. and Corrieu G. (2000). Method of quantifying the loss of acidification activity of lactic acid starters during freezing and frozen storage . Journal of Dairy Research67: 83–90 .
15.
Gardiner G.E. , Bouchier P. , O’Sullivan E. , Kelly J. , Collins J.K. , Fitzgerald G.F. , Ross R.P. and Stanton C. (2002). A spray-dried culture for probiotic cheddar cheese manufacture . International Dairy Journal12: 749–756 .
16.
Gardiner G.E. , O’Sullivan E. , Kelly J. , Auty M.A.E. , Fitzgerald G.F. , Collins J.K. , Ross R.P. and Stanton C. (2000). Comparative survival rates of human-derived probiotic Lactobacillus paracaseiand L. salivarius strains during heat treatment and spray-drying . Applied and Environmental Microbiology66(6): 2605–2612 .
17.
Johnson J.A.C. and Etzel M.R. (1995). Properties of Lactobacillus helveticusCNRZ-32 attenuated by spraydrying, freeze-drying, or freezing . Journal of Dairy Science78(4): 761–768 .
18.
Lian W. , Hsiao H. and Chou C. (2002). Survival of bifidobacteria after spray-drying . International Journal of Food Microbiology74(1–2): 79–86 .
19.
Mauriello G. , Aponte M. , Andolfi R. , Moschetti G. and Villani F. (1999). Spray-drying of bacteriocinproducing lactic acid bacteria . Journal of Food Protection62: 773–777 .
20.
Metwally M.M. , Abd El-Gawad I.A. , El-Nockrashy S.A. . and Ahmed K.E. (1989). Spray-drying of lactic acid culture: the effect of spray drying conditions on the survival of microorganisms . Egyptian Journal of Dairy Science17: 35–43 .
21.
Parès D. and Ledward D.A. (2001). Emulsifying and gelling properties of porcine blood plasma as influenced by high pressure processing . Food Chemistry74 (2): 139–145 .
22.
Parès D. , Saguer E. , Saurina J. , SuÒol J.J. and Carretero C. (1998). Functional properties of heat induced gels from liquid and spray dried porcine blood plasma as influenced by pH . Journal of Food Science65(6): 958–961
23.
Parès D. , Saguer E. , Toldrà M. and Carretero C. (2000). Effect of high pressure processing at different temperatures on protein functionality of porcine blood plasma . Journal of Food Science65(3): 486–490 .
24.
Parès D. , Zamora L. , Saguer E. and Carretero C. (2004). Acid lactic bacteria as biopreservative cultures in porcine blood for human consumption. Food Info Online Features2 April 2004 http://www.foodsciencecentral.com/library.html%23ifis/13082.
25.
Saguer E. , Altarriba S. , Lorca C. , Parès D. , Toldrà M. and Carretero C. (2003). Color stabilization of spray-dried porcine red blood cells using nicotinic acid and nicotinamide . Food Science and Technology International9 (4): 301–307 .
26.
Speckman C.A. , Sandine W.E. and Elliker P.R. (1973). Lyophilized lactic acid starter culture concentrates: preparation and use in inoculation of vat milk for cheddar and cottage cheese . Journal of Dairy Science57(2): 165–173 .
27.
Teixeira P. , Castro H. and Kirby R. (1995a). Spray-drying as a method for preparing concentrated cultures of Lactobacillus bulgaricus . Journal of Applied Bacteriology78(4): 456–462 .
28.
Teixeira P.C. , Castro M.H. , Malcata F.X. and Kirby R.M. (1995b). Survival of Lactobacillus delbrueckiissp. bulgaricusfollowing spray-drying . Journal of Dairy Science78(5): 1025–1031 .
29.
To B.C.S. and Etzel M.R. (1997a). Survival of Brevibacterium linens(ATCC 9174) after spray-drying, freezedrying, or freezing . Journal of Food Science62(1): 167–170 .
30.
To B.C.S. and Etzel M.R. (1997b). Spray drying, freeze drying, or freezing of three different lactic acid bacteria species . Journal of Food Science62(3): 576–578 .
31.
Toldrà M. , Elias A. , Parès D. , Saguer E. and Carretero C. (2004). Functional properties of spray dried porcine red blood cells fraction treated by high hydrostatic pressure . Food Chemistry88(3): 461–468 .
32.
Zamora L. (2003). Aislamiento, identificación y conservación de cultivos de bacterias lácticas antagonistas de microbiota contaminante de sangre de cerdo de matadero. PhD thesis. Institut de Tecnologia Agroalimentària (INTEA). University of Girona, Spain.
33.
Zamora L. , Carretero C. and Parès D. (2003). Aplicación de bacterias ácido lácticas como cultivo bioprotector en sangre de cerdo procedente de matadero industrial . Alimentación, Equipos y Tecnología175: 45–50 .
34.
Zamora L.M. , Guajardo M. , Saguer E. , Bonaterra A. , Carretero C. and Parès, D. (2001). Application of lactic acid bacteria as biopreservative culture of blood from slaughtered animals . In: Proceedings of III Congreso Iberoamericano de Ingeniería de Alimentos and I Congreso espaòol de Ingeniería de alimentos. Valencia2001, 7C-14.III.
