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Bacteria in yogurt and kefir Byliana Savova BIOL 108
Introduction <ul><li>Yogurt Bacteria </li></ul><ul><li>Fermentation </li></ul><ul><li>Bacteria in Kefir </li></ul><ul><li>...
Yogurt Bacteria <ul><li>Originated in plants </li></ul><ul><li>Made its way into ‘food’ - yogurt </li></ul><ul><li>Strains...
Fermentation <ul><li>Milk is very perishable </li></ul><ul><li>People through the ages had found fermentation to be the be...
Fermentation <ul><li>Lactobacillus acidophilus or L. Bulgaricus </li></ul><ul><ul><li>Big rod-shaped bacilli  </li></ul></...
Kefir <ul><li>Another ‘liquid’ Fermented Milk Product </li></ul><ul><li>Originated in the Former Soviet Union  </li></ul><...
Kefir Please click on screen to view video
Kefir Grains <ul><li>Kefir grains resemble small cauliflower  florets </li></ul><ul><li>Cluster of microorganisms </li></u...
Probiotics <ul><li>From Greek - ‘for life’ </li></ul><ul><li>Probiotics are living non pathogenic bacteria  </li></ul><ul>...
Benefits <ul><li>Boost immune system </li></ul><ul><li>Promotes weight loss </li></ul><ul><li>Raise good cholesterol </li>...
Benefits
Kefir Benefits <ul><li>Guard against infection </li></ul><ul><li>Fights metabolic disorders </li></ul><ul><li>Used in Form...
Work Cited Crislip, Mark. “Probiotics.” Science based medicine. Basic Science,Science and Medicine,Science and the Media, ...
  Conclusion <ul><li>Yogurt Bacteria </li></ul><ul><li>Fermentation </li></ul><ul><li>What is Kefir </li></ul><ul><li>Bact...
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  1. 1. Bacteria in yogurt and kefir Byliana Savova BIOL 108
  2. 2. Introduction <ul><li>Yogurt Bacteria </li></ul><ul><li>Fermentation </li></ul><ul><li>Bacteria in Kefir </li></ul><ul><li>Probiotic </li></ul><ul><li>Benefits </li></ul><ul><li>Conclusion </li></ul>
  3. 3. Yogurt Bacteria <ul><li>Originated in plants </li></ul><ul><li>Made its way into ‘food’ - yogurt </li></ul><ul><li>Strains different between regions </li></ul><ul><li>Mesophilic – no t o requirements </li></ul><ul><li>Thermophilic - heat required for fermentation </li></ul><ul><ul><li>Greek type yogurt </li></ul></ul>
  4. 4. Fermentation <ul><li>Milk is very perishable </li></ul><ul><li>People through the ages had found fermentation to be the best way to preserve it </li></ul><ul><li>Improves nutritional value </li></ul><ul><li>Bacteria in Yogurt breaks down Lactose into Lactic Acid and turn it into solid mass </li></ul><ul><ul><li>Helps prevent growth of pathogenic bacteria by lowering pH </li></ul></ul>
  5. 5. Fermentation <ul><li>Lactobacillus acidophilus or L. Bulgaricus </li></ul><ul><ul><li>Big rod-shaped bacilli </li></ul></ul><ul><li>Streptococus Thermophilis </li></ul><ul><ul><li>Smaller round shaped </li></ul></ul><ul><li>Most common ones among all Yogurt </li></ul>
  6. 6. Kefir <ul><li>Another ‘liquid’ Fermented Milk Product </li></ul><ul><li>Originated in the Former Soviet Union </li></ul><ul><li>Consumed for thousands of years </li></ul><ul><li>Consists of Bacteria and Yeast </li></ul><ul><li>Slightly carbonated taste with low alcohol content </li></ul><ul><li>Can be consumed as is or in cooking </li></ul>
  7. 7. Kefir Please click on screen to view video
  8. 8. Kefir Grains <ul><li>Kefir grains resemble small cauliflower florets </li></ul><ul><li>Cluster of microorganisms </li></ul><ul><ul><li>living in symbiotic relationship </li></ul></ul><ul><li>Besides the Bacteria found in Yogurt they also include Yeast </li></ul><ul><li>Also suppress pathogenic bacteria </li></ul><ul><ul><li>Salmonella </li></ul></ul><ul><ul><li>Shigella (causes dysentery) </li></ul></ul>
  9. 9. Probiotics <ul><li>From Greek - ‘for life’ </li></ul><ul><li>Probiotics are living non pathogenic bacteria </li></ul><ul><li>Help lower the pH of the intestines </li></ul><ul><li>Creates non desirable environment for pathogenic bacteria </li></ul><ul><li>Both Yogurt and Kefir contain Probiotics </li></ul>
  10. 10. Benefits <ul><li>Boost immune system </li></ul><ul><li>Promotes weight loss </li></ul><ul><li>Raise good cholesterol </li></ul><ul><li>Helps build bones </li></ul><ul><li>Reduce gingivitis </li></ul><ul><li>Lactose-intolerant friendly </li></ul><ul><li>Guard against colon-cancer </li></ul><ul><li>Increase Allergy Tolerance </li></ul><ul><li>Lower Blood Pressure </li></ul>
  11. 11. Benefits
  12. 12. Kefir Benefits <ul><li>Guard against infection </li></ul><ul><li>Fights metabolic disorders </li></ul><ul><li>Used in Former USSR for variety of condition: </li></ul><ul><ul><li>Tuberculosis </li></ul></ul><ul><ul><li>Cancer </li></ul></ul><ul><ul><li>Gastro Intestinal Disorders </li></ul></ul><ul><li>Associated with longevity </li></ul><ul><li>Fights Aterosclerosis </li></ul><ul><li>Regulates digestive track </li></ul>
  13. 13. Work Cited Crislip, Mark. “Probiotics.” Science based medicine. Basic Science,Science and Medicine,Science and the Media, 2009. Web. 18 Apr. 2011.   Fankhauser, B. “ Milk Fermenters.” Milk fermenters in yogurt, buttermilk and sour cream. University of Cincinnati Clermont College, 2004. Web. 15 Apr. 2011.   Farnworth, Edward R. “The evidence to support health claims for Probiotics 1,2.” The journal of nutrition 138.6 (2008):12505-45. ProQuest. Web. 8 Mar. 11.   Feickert, Julie. “Yogurt Bacteria.” Cultures for health. March 2011. Web. 3 Apr. 2011. Probiotics. 2007. Chrisjc2010. Video. Web. 24 Apr. 2011.   Fermented Foods & Digestion : Eating Healthy with KefirFermented Foods & Digestion : Eating Healthy with Kefir. 2008. Expertvillage. Video. Web. 13 Apr. 2011.   Saloff-Coste, Cathy J. “RawHealth’s Probiotics. The kefir curds article.” dwb. n.p. 2000. Web. 12 Mar. 11.   “ The Role of Bacteria in the Health Potential of Yogurt.” Microbewiki. n.p. 10 Aug. 2010. Web. 12 Mar. 11.   “ Yogurt.”Microbewiki. n.p. 20 Aug. 2010. Web. 12 Mar.11.
  14. 14. Conclusion <ul><li>Yogurt Bacteria </li></ul><ul><li>Fermentation </li></ul><ul><li>What is Kefir </li></ul><ul><li>Bacteria in Kefir </li></ul><ul><li>Probiotic </li></ul><ul><li>Benefits </li></ul>
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