DIY FERMENTATION: MAKING FOOD BASED PROBIOTICS AT HOME · diy fermentation: making food based...
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DIY FERMENTATION: MAKING FOOD BASED PROBIOTICS AT HOME
SUSAN AARONSON, RD
JILL SCHNEIDERHAN, MD
CREATING A SPACE FOR HEALTH: INTEGRATIVE HEALTH IN
PRIMARY CARE
MARCH 16, 2017
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OBJECTIVES
• PARTICIPANTS WILL BE ABLE TO DESCRIBE THE BENEFITS OF FOOD
BASED PROBIOTICS
• PARTICIPANTS WILL BE ABLE TO DISCUSS THE KEY ELEMENTS FOR
SAFELY FERMENTING FOOD AT HOME
• PARTICIPANTS WILL BE ABLE TO DEMONSTRATE HOW TO MAKE A
FERMENTED VEGETABLE PRODUCT
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THE MICROBIOME
• THE MICROBIOME CONSISTS OF ALL THE MICROBES THAT LIVE
ON AND IN HUMANS
• CONTRIBUTES 99% OF THE GENETIC MATERIAL IN THE HUMAN
BODY
• THE HIGHEST NUMBER OF ORGANISMS ARE FOUND INSIDE THE
GASTROINTESTINAL TRACT
• MOST ARE BACTERIA
• 90% ARE ANAEROBIC
Tsukumo DM et. Al. Archives of endocrinology and metabolism. Apr 2015
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SOME BASIC TERMINOLOGY
• PREBIOTICS - NONDIGESTIBLE COMPLEX SUGARS THAT PROMOTE
GROWTH AND METABOLIC ACTIVITY OF BENEFICIAL COLONIC
BACTERIA
• MOST COMMON PREBIOTICS FOUND IN SUPPLEMENTS ARE FRUCTO-
OLIGOSACCHARIDES (FOS’S). I.E. INULIN AND OLIGOFRUCTOSE.
• FERMENTABLE FIBER, DI-, POLY-, OLIGOSACCHARIDES (FOUND IN
BRAN, PSYLLIUM, QUINOA, BUCKWHEAT, RAW OATS, RYE, HONEY,
LEGUMES, BEER, ONIONS, GARLIC, BURDOCK ROOT, CHICORY,
LEGUMES, ASPARAGUS, RYE, JERUSALEM ARTICHOKES, BANANAS,
BERRIES, NUTS, LEAFY GREENS).
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SOME BASIC TERMINOLOGY
• PROBIOTICS - LIVE MICROORGANISMS, INCLUDING
BACTERIA AND YEAST, WITH BENEFICIAL PROPERTIES FOR
THE HOST
• MEASURED IN COLONY FORMING UNITS (CFUS)
• NATURALLY OCCURRING IN FERMENTED FOODS
• SYNBIOTICS - COMBINATION OF PROBIOTICS AND
PREBIOTICS
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GUT FLORA
• THE COMPOSITION OF THE GUT FLORA IS DIVERSE
• EACH INDIVIDUAL HAS A UNIQUE MICROBIAL FOOTPRINT
• SMALL NUMBER OF GENES RESPONSIBLE FOR THE MAJOR
FUNCTIONS OF THE GUT FLORA1
• FACTORS THAT CONTRIBUTE TO THE COMPOSITION INCLUDE:
• HOW A PERSON IS BORN (CESAREAN SECTION VS. VAGINAL),2
• BREAST OR BOTTLE3
• USE OF ANTIBIOTICS4
• DIET (SOLUBLE FIBER FROM FRUITS AND VEGETABLES IS PARTICULARLY
IMPORTANT)5
• HYGIENE/SANITATION.6
1. Structure, function and diversity of the healthy human microbiome. Nature. June 2012. 2. Gronlund MM et
al. J Pediatr Gastroenterol Nutr. Jan 1999. 3. Wolowczuk I et al. Clinical and Developmental Immunology. Feb
2008. 4. Vangay P et al. Cell host & microbe. May 13 2015. 5. Cotillard A, et al. Nature. Aug 2013. 6.
Azad MB, et al. Allergy, Asthma, and Clinical Immunology : Official Journal of the Canadian Society of Allergy
and Clinical Immunology. Apr 2013.
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PROBIOTICS AND NORMAL FLORA
• ROLE IN DIGESTION/NUTRITION
• SUPPLYING ESSENTIAL NUTRIENTS THROUGH THEIR BREAKDOWN OF COMPLEX
CARBOHYDRATES
• GENERATING SECONDARY BILE ACIDS THAT ASSIST IN THE DIGESTION OF FATS1
• SYNTHESIZING VITAMINS SUCH AS VITAMINS K, B12, FOLATE, AND BIOTIN2
• ROLE IN IMMUNE SYSTEM/PROTECTION
• CONTRIBUTE TO THE DEFENSIVE BARRIER IN THE COLON
• STIMULATE MUCOUS PRODUCTION, LYMPHATIC TISSUE DEVELOPMENT, ANTIBODY FORMATION
• INDUCE PROTECTIVE CYTOKINES, SUPPRESS PRO-INFLAMMATORY CYTOKINES IN THE MUCOSA OF
PATIENTS THROUGH THE ACTIONS OF SHORT CHAIN FATTY ACIDS (SCFA’S) 3
• INTERACT WITH OUR SYSTEMIC IMMUNE SYSTEM IN A WAY THAT MAINTAINS A
LEVEL OF HOMEOSTASIS
• ALLOWING FOR THE APPROPRIATE ACTIVATION
• WITH NO AUTOIMMUNITY.3
1. Conlon MA, Bird AR. Nutrients. Jan 2015. 2. Nicholson JK, et al. Science. June 2012. 3. Zhang YJ, et al.
International journal of molecular sciences. 2015.
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PROBIOTICS AND NORMAL FLORA
• ROLE IN GUT-BRAIN AXIS
• BIDIRECTIONAL COMMUNICATION
• BRAIN CAN SIGNAL ENTERIC NERVOUS SYSTEM TO SPEED UP OR SLOW DOWN
TRANSIT TIME
• NEUROTRANSMITTERS GENERATED BY GUT BACTERIA CAN AFFECT PATHWAYS IN THE
CNS
• HORMONAL SIGNALING
• NERVOUS SYSTEM COMMUNICATION1,2
• MODULATE PAIN PERCEPTION
• L ACIDOPHILUS INDUCES EXPRESSION OF MU-OPIOID
AND CANNABINOID RECEPTORS IN INTESTINAL
EPITHELIAL CELLS, MEDIATES ANALGESIC
FUNCTIONS SIMILAR TO MORPHINE3
1. Tillisch K. Gut microbes. May 2014. 2. Cong X, Hender et al. Advances in neonatal care : official journal
of the National Association of Neonatal Nurses. Oct 2015. 3. Rousseaux C, et al. Nat Med. Jan 2007.
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HEALTHY MICROBIOME
• INCREASED MICROBIAL DIVERSITY
• DISEASE MARKERS RISE WITH DECREASED DIVERSITY
• INCREASED ADIPOSITY, INSULIN, TRIGLYCERIDES AND C-REACTIVE PROTEIN. 1
• SPECIFIC SPECIES ASSOCIATIONS
• A NUMBER OF STUDIES HAVE FOUND ASSOCIATIONS WITH PARTICULAR
BACTERIAL SPECIES AND DISEASE MANIFESTATION.
• CHANGING DIET ALONE CAN HAVE A SIGNIFICANT IMPACT
• NUMBER OF SPECIES PRESENT
• INCREASES IN SOLUBLE FIBER THROUGH INCREASED SERVINGS
OF FRUITS AND VEGETABLES LEADS TO THE GREATEST LONG
TERM IMPROVEMENT IN THE MICROBIAL DIVERSITY. 2
1. Le Chatelier E, et al. Nature. Aug 2013. 2. Cotillard A, et al. Nature. Aug 2013.
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NATIVE GUT FLORA
• STOMACH
• LACTOBACILLUS
• PROXIMAL SMALL INTESTINE
• RELATIVELY FEW BACTERIA (~105 - 107 PER ML FLUID): PRIMARILY
LACTOBACILLUS, ENTEROCOCCUS
• TERMINAL ILEUM
• TRANSITIONAL ZONE, BOTH AEROBIC AND ANAEROBIC ORGANISMS
(~108/ML): LACTOBACILLUS, BACTEROIDES, ENTEROCOCCUS, E. COLI
• COLON
• PRIMARILY STRICT ANAEROBES (~1011/ML): BACTEROIDES,
BIFIDOBACTERIA, ENTEROCOCCUS, E. COLI, LACTOBACILLUS,
CLOSTRIDIUM, STAPHYLOCOCCUS, KLEBSIELLA, ENTEROBACTER
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ABOUT THE EVIDENCE
• HETEROGENEOUS EVIDENCE BASE
• MAKES ACCUMULATING EVIDENCE FOR ANY ONE
PROBIOTIC DIFFICULT
• META-ANALYSIS ARE CHALLENGING
• LOTS OF SMALL STUDIES
• SOME USING PROBIOTIC SUPPLEMENTS
• SOME USING FERMENTED FOODS
• NO ONE YET LOOKING AT GUT FLORA MAKE UP OF THOSE
PARTICIPATING IN STUDIES
• LIKELY WILL NEVER BE A ONE SIZE FITS ALL TREATMENT
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IRRITABLE BOWEL SYNDROME
• PROBIOTICS ASSOCIATED WITH DECREASED PAIN, BLOATING, URGENCY 1,2
• RESTORE MORE NORMAL GUT MICROFLORA, IMPROVE INTESTINAL PERMEABILITY,
NORMALIZE IMBALANCES IN INFLAMMATORY CYTOKINE RATIOS
• SOLUBLE FIBER, COMMONLY FOUND TO BE HELPFUL IN TREATING IBS, HAS BEEN
SHOWN TO HAVE PROFOUND EFFECTS ON IMPROVING MICROBIOTA DIVERSITY
AND IN SHIFTING THE COMPOSITION TOWARD LESS PATHOGENIC STRAINS 3,4
• DOSING:
• VSL#3, 225 BILLION CFU DAILY-BID
• MULTIPLE STRAINS OF BIFIDOBACTERIUM AND
LACTOBACILLUS, 20-40 BILLION CFU, DAILY TO BID
• RECOMMEND TRIAL FOR 4-8 WEEKS, CAN
THEN TRY DECREASING DOSE
1. Didari T et al. World J Gastroenterol. Mar 14 2015. 2. Ford AC et al. Am J Gastroenterol. Oct 2014. 3. Moayyedi P, et al. Am J Gastroenterol. Sept 2014. 4. Simpson HL, Campbell BJ. Aliment Pharmacol Ther. Jul 2015.
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INFLAMMATORY BOWEL DISEASE• INFLAMMATION OF THE GASTROINTESTINAL LINING DUE TO AN
OVERACTIVE IMMUNE RESPONSE.
• ALTERATION IN MICROBIAL COMPOSITION
• INCREASE IN BACTERIA THAT PRODUCE PRO-INFLAMMATORY MOLECULES
• DECREASE IN BACTERIA THAT HAVE A DAMPENING EFFECT ON IMMUNE
ACTIVATION1
• RECENT META-ANALYSES SHOWED EFFECTIVENESS OF COMBINATION
PROBIOTICS FOR BOTH INDUCTION OF, AND MAINTENANCE OF,
REMISSION IN ULCERATIVE COLITIS2
• VSL #3 - 2 CAPSULES DAILY (225 BILLION CFU) FOR 8-12 WEEKS FOR
INDUCTION OR LONG TERM FOR MAINTENANCE OF REMISSION2
• NO EVIDENCE FOR THEIR USE IN CROHN’S DISEASE
1. Hansen JJ, et al. Current treatment options in gastroenterology. Mar 2015. 2. Fujiya M, et al. Clinical
journal of gastroenterology. Feb 2014.
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DIARRHEA
• COLONIZATION RESISTANCE: MECHANISM BY WHICH THE HUMAN
INTESTINE IS PROTECTED FROM DIARRHEAL ILLNESS BY HEALTHY BACTERIA
THAT BLOCK THE ACTIONS OF PATHOGENIC BACTERIA1
• ANTIBIOTIC ASSOCIATED DIARRHEA: MICROBIAL BALANCE IS ALTERED BY
ANTIBIOTIC USE.
• RECENT META-ANALYSES HAVE SHOWN AN OVERALL RISK REDUCTION
WITH THE USE OF PROBIOTICS FOR PREVENTION OF BOTH AAD IN
GENERAL AND ALSO CLOSTRIDIUM DIFFICILE ASSOCIATED DIARRHEA.2,3
1. McFarland LV. Travel Medicine and Infectious Disease. Mar 2007. 2. Hempel S, et al. Jama. May 9 2012.
3. Szajewska H, Kolodziej M. Aliment Pharmacol Ther. October 2015.
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DIARRHEA
• ACUTE INFECTIOUS DIARRHEA AND TRAVELER’S DIARRHEA
• COCHRANE LEVEL EVIDENCE SHOWING THAT PROBIOTICS DECREASE THE
DURATION OF A DIARRHEAL EPISODE BY 25 HOURS, DECREASE THE RISK
OF THE EPISODE LASTING MORE THAN 4 DAYS BY 59%, AND LED TO
ONE FEWER DIARRHEAL STOOL PER DAY BY DAY TWO OF THE
INTERVENTION.1
• PROBIOTICS WERE SHOWN IN A META-ANALYSIS OF 12 STUDIES TO
PREVENT 85% OF CASES OF TRAVELER’S DIARRHEA.
1. Allen SJ, et al. The Cochrane database of systematic reviews. 2010.
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DEPRESSION
• A STATE OF CHRONIC LOW GRADE INFLAMMATION AND OXIDATIVE STRESS1
• TRADITIONAL DIETS (MEDITERRANEAN AND JAPANESE) HAVE BEEN SHOWN TO
CONFER A LEVEL OF PROTECTION AGAINST DEPRESSION1
• FERMENTED FOODS FROM TRADITIONAL DIETS PROVIDE ANTI-INFLAMMATORY
EFFECTS AND PRODUCE INCREASED GABA1
• MECHANISMS THROUGH WHICH THE GUT-BRAIN AXIS IS THOUGHT TO IMPACT
MENTAL HEALTH
• MODULATION OF THE HPA AXIS
• ACTIVATION OF THE IMMUNE SYSTEM
• PRODUCTION OF ACTIVE METABOLITES
• DIRECT INVOLVEMENT OF THE VAGUS NERVE2,3
1. Selhub EM, et al. J Physiol Anthropol. 2014. 2. Tillisch K. Gut microbes. May 2014. 3. Petra AI, et al.
Clinical therapeutics. May 2015.
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DEPRESSION
• DIFFERENCES IN PATTERNS OF BOTH OVER AND UNDERREPRESENTED
MICROBIOTA SPECIES IN DEPRESSED PATIENTS1
• ONE SMALL STUDY OF HEALTHY WOMEN SHOWED THAT A
FERMENTED MILK PRODUCT WITH PROBIOTIC IMPACTED THE AREAS
OF THE BRAIN THAT CONTROL EMOTION AND SENSATION ON FMRI.2
• A FEW SMALL STUDIES HAVE SHOWN IMPROVEMENT IN DEPRESSION
SCORES WITH PROBIOTICS.3
1. Jiang H, et al. Brain, behavior, and immunity. Aug 2015. 2. Tillisch K, et al. Gastroenterology. June 2013.
3. Bested AC, et al. Gut pathogens. 2013.
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OBESITY
• MULTIFACTORIAL PROCESS
• IN SETTING OF STABLE ENERGY CONSUMPTION AND ADEQUATE
PHYSICAL ACTIVITY – PREVALENCE OF METABOLIC DISORDERS IS RISING
• ANIMAL DATA SHOWING THAT THE MICROBIOTA OF OBESE RATS CAUSE
WEIGHT GAIN IN SETTINGS OF CONTROLLED CALORIE INTAKE
• MECHANISM IS THOUGHT TO BE THROUGH INCREASED CALORIE BREAK DOWN AND
ABSORPTION
• RECENT META-ANALYSIS OF 4 RCT’S SHOWED NO DIFFERENCE IN THOSE
TREATED WITH PROBIOTICS FOR WEIGHT LOSS
• 2 STUDIES NOT INCLUDED FOR POOR DESCRIPTION OF RANDOMIZATION WERE LONGER
AND WITH HIGHER DOSES OF PROBIOTICS SHOWED POSITIVE RESULTS
• POSSIBLE THAT FUTURE STUDIES WILL WITH HIGHER CONCENTRATIONS AND BETTER
CONTROL FOR DIET WILL SHOW BETTER RESULTS
Park S, Bae JH. Nutrition research (New York, N.Y.). Jul 2015.
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DIABETES
• HYPOTHESIS IS THAT DYSBIOSIS OF THE GUT FLORA
• ACTIVATION OF PRO-INFLAMMATORY CYTOKINES
• DISRUPTION OF THE INTESTINAL MUCOSA
• LEADING TO SYSTEMIC INFLAMMATION AND GLUCOSE DYSREGULATION
• PROBIOTIC SUPPLEMENTATION STUDIES ARE SHOWING LARGELY BENEFICIAL
EFFECTS ON GLYCEMIC CONTROLS ESPECIALLY IN ANIMAL STUDIES.
• THE LARGEST SYSTEMATIC REVIEW TO DATE LOOKED AT 33 STUDIES OF WHICH
5 WERE IN HUMANS.
• ALL OF THE STUDIES IN HUMANS SHOWED A SIGNIFICANT REDUCTION IN AT
LEAST ONE PARAMETER OF GLYCEMIC CONTROL
• IT IS STILL UNCLEAR WHICH STRAINS CONFER THE MOST BENEFIT AND IF THOSE
BENEFITS ARE SUSTAINABLE WITHOUT DIETARY AND ACTIVITY CHANGES.
Le Barz M, et al. Diabetes & metabolism journal. Aug 2015. Tarantino G, Finelli C. Future microbiology. 2015.
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PREVENTION OF URI
• EVIDENCE MIXED, BUT PROMISING
• COCHRANE REVIEW OF 13 RCTS WITH 3270
PARTICIPANTS COMPARING PROBIOTICS VS. PLACEBO FOR
PREVENTION OF URI, DURATION OF SYMPTOMS
• OVERALL, PROBIOTICS REDUCED NUMBER OF PARTICIPANTS WITH ACUTE
URI, REDUCED RATE RATIO OF ACUTE URI, AND REDUCED ANTIBIOTIC USE
BUT QUALITY OF EVIDENCE WAS LOW
• DECREASED LENGTH OF URI BY 1.89 DAYS OVER PLACEBO
• MOST BENEFICIAL STRAINS INCLUDED MIXED LACTOBACILLUS OR
LACTOBACILLUS PLUS BIFIDOBACTERIUM
Hao Q et al. The Cochrane database of systematic reviews. 2015.
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OTHER AREAS OF PROMISE
• ALLERGIC RHINITIS
• ASTHMA
• ADHD
• AUTISM
• CHRONIC FATIGUE
• CYSTIC FIBROSIS
• DENTAL DISEASE
• DIABETES
• DIVERTICULAR DISEASE
• FOOD ALLERGY
• GERD
• HYPERTENSION
• HYPERLIPIDEMIA
• LIVER DISEASE/HEPATIC
ENCEPHALOPATHY
• RHEUMATOID ARTHRITIS
• NEPHROLITHIASIS
• NOSOCOMIAL/ICU INFECTION
• POST-OP INFECTION
• URI
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CONCLUSION
• “EAT FOOD, NOT TO MUCH, MOSTLY VEGETABLES” –
MICHAEL POLLEN
• FAVOR VAGINAL DELIVERY AND BREASTFEEDING
• EAT A DIET RICH IN FRUITS AND VEGETABLES.
• STAY ACTIVE
• CONSIDER ADDITION OF PROBIOTICS FOR CERTAIN
CONDITIONS WHERE INDICATED
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FOOD FERMENTATION
• THE CONVERSION OF CHO TO ALCOHOLS AND CARBON DIOXIDE OR ORGANIC ACIDS
USING YEASTS AND/OR BACTERIA, OCCASIONALLY MOLD UNDER ANAEROBIC CONDITIONS.
C6H12O6 → 2 C2H5OH + 2 CO2
• DESIRABLE GROWTH OF MICROORGANISMS
• SUPPORTED BY METABOLISM OF NUTRIENTS IN FOOD
• PRODUCTION OF ATP VIA GLYCOLYSIS
• CONTROLLED CONDITIONS
• ACID AND ALCOHOL PRESERVE FOOD AND PROVIDE FLAVOR
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FERMENTED FOOD CATEGORIES
• SOY (TEMPEH, SOY SAUCE, TOFU, NATTO)
• ALCOHOLIC BEVERAGES (WINE, BEER, CIDER, SPIRITS)
• BEVERAGES (COFFEE, COCOA BEANS, TEA)
• MEAT (CHORIZO, PEPPERONI, SALAMI)
• GRAIN (BREAD, BEER)
• VEGETABLES (SAUERKRAUT, KIMCHI, PICKLES)
• MILK (YOGURT, KEFIR, BUTTERMILK, CHEESE)
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FERMENTATION PURPOSES
• ENRICHMENT OF THE DIET THROUGH DEVELOPMENT OF A DIVERSITY
OF FLAVORS, AROMAS, AND TEXTURES IN FOOD SUBSTRATES
• PRESERVATION OF SUBSTANTIAL AMOUNTS OF FOOD THROUGH
LACTIC ACID, ALCOHOL, ACETIC ACID AND ALKALINE FERMENTATIONS
• BIOLOGICAL ENRICHMENT OF FOOD SUBSTRATES WITH PROTEIN,
ESSENTIAL AMINO ACIDS, ESSENTIAL FATTY ACIDS, AND VITAMINS
• FOOD SAFETY - ELIMINATION OF UNWANTED MICROORGANISMS
• TIME SAVING – DECREASES COOKING TIME AND FUEL REQUIREMENT
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FOOD SAFETY – MICROBIAL GROWTH
• NUTRIENT AVAILABILITY
• WATER ACTIVITY
• PH
• OXYGEN
• TEMPERATURE
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FERMENTATION “STARTERS”
• LACTIC ACID BACTERIA CULTURE
• YEAST
• MOLD
• EXOGENOUS ADDITION OR NATURAL COMPONENT OF FOODSTUFF
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LACTIC ACID FERMENTORS
HOMOFERMENTORS
PRODUCE LACTIC ACID ONLY
• LACTOBACILLUSS ACIDOPHILUS
• LACTOCOCCUS LACTIS
C6H12O6 → 2 CH3CHOHCOOH
HETEROFERMENTORS C6H12O6 → CH3CHOHCOOH + C2H5OH + CO2
PRODUCE MORE THAN ONE COMPOUND
• I.E. ETHANOL, DIACETYL, LACTIC ACID, ETHANOL, ETC.
• STREPTOCOCCUS THERMOPHILUS
• LEUCONOSTOC CREMORIS
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STARTER CULTURES
• POOLISH, BIGA, DESEM, SPONGE
• STARTS FERMENTATION PROCESS
• SAMPLE OF PREVIOUS BATCH OF FERMENTED FOOD
OR MICROORGANISMS
• ADDED TO FOOD TO PRODUCE DESIRED PRODUCT
• ADDING HIGH NUMBER OF ORGANISMS SPEEDS UP
FERMENTATION PROCESS
• SPECIFIC TYPE OF BACTERIA ADDED TO FOOD TO
PRODUCE DESIRABLE PRODUCT
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FERMENTED DAIRY PRODUCTS
• YOGURT
• SOUR CREAM
• BUTTERMILK
• CHEESE
• KEFIR
• KOUMISS
• ROPY MILKS
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MILK – LACTIC ACID BACTERIA
• LACTOCOCCUS – FOUND PRIMARILY ON PLANTS
• LACTOBACILLUS – 50+ VARIETIES FOUND IN BOTH PLANTS AND
ANIMALS
• STOMACH OF MILK-FED CALVES
• HUMAN MOUTH
• DIGESTIVE TRACT
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MILK FERMENTATION - OVERVIEW
• HEAT MILK
• COOL TO DESIRABLE TEMPERATURE
• ADD BACTERIA
• MONITOR TIME
• COOL FOR STORAGE
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Product Region Microbe Temperature Acidity
Yogurt Middle
east/India
Lactobacillus
delbrueckii
Streptococcus
salvarius
106-114ºF
(2-5 hours)
1-4%
Buttermilk Eurasia Lactococcus
lactis
Leuconostoc
mesenteroides
72ºF
(14-16
hours)
0.8-1.1%
Sour cream Europe Lactococcus
lactis
Leuconostoc
mesenteroides
72ºF
(16 hours)
0.8%
Koumiss
0.7-2.5%
alcohol
Central Asia Lactobacilli
Yeasts
80ºF
(2-5 hours)
0.5-1%
Kefir
0.1% alcohol
Central Asia Lactococci,
lactobacilli,
Acetobacter,
Yeasts
68ºF
(24 hours)
1%
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S. thermophilus
L. delbrueckii ss. bulgaricus
S. thermophilus
L. delbrueckii ss. bulgaricus
Production of
Formic acid
Lactic acid
amino acids
Formic acid
pH=5.5
Lactic acid
pH 4.8
110°F
Stimulates
growth
Stimulates
growth
Stimulates
growth
Series of steps in fermentation of milk to produce yogurt
Cooling and low pH stops growth
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FERMENTATION OF MEAT(SAUSAGES)
• WHY? DEVELOPS FLAVOR OF PROTEIN AND FAT. PRESERVES MEAT WITHOUT NEED FOR REFRIGERATION
• CULTURE MUST BE APPROVED BY USDA
• TYPE OF BACTERIA USED TO FERMENT MEAT MUST BE:
• SALT-TOLERANT
• FROZEN UNTIL USE (106CFU/GRAM)
• ADDED AFTER CURING AND SEASONING
• PRODUCE ACID AND PH CHANGE
• GOAL PH<5.3
• CONTROLLED BY AMOUNT OF SUGAR ADDED, TEMPERATURE, AND TIME
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TYPES OF SAUSAGES• NORTHERN
• NORTHERN EUROPEAN VARIETIES
• 40-50% WATER, 3.5% SALT, REFRIGERATED
• SUMMER SAUSAGES AND GERMAN CERVALATS
• SOUTHERN
• DRY, SALTY, WELL-SPICED TYPICAL OF WARM, DRY MEDITERRANEAN
• 25-35% WATER, 4% SALT, STORED AT RT
• SALAMI AND CHORIZO
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MODERN SAUSAGE MAKING• EUROPE ADDS NITRATES AND US NITRITES TO PREVENT BOTULISM
• FERMENTATION LASTS 18 HOURS – 3 DAYS
• TEMPERATURE DEPENDENT (60-100ºF)
• PH 4.5-5.0
• SAUSAGE IS COOKED AND/OR SMOKED
• DRIED FOR 2-3 WEEKS TO DESIRED MOISTURE CONTENT
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FERMENTING PRODUCE• STARTER CULTURE COMPOSED OF NORMAL MIXED FLORA OF RAW
VEGETABLE
CabbageLactic acid, lowers pH
CO2 creates and
maintains anaerobic conditions
Leuconostoc mesenteroides
Sauerkraut
Fermentation
Lactobacillus brevisPediococceus cerevisiae
2.5% salt
64°F
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FERMENTING ALCOHOL BEVERAGES
• BEER (GRAINS, PRIMARILY BARLEY)
• WINE (FRUIT, PRIMARILY GRAPES)
• SPIRITS OR DISTILLED BEVERAGES (GRAINS, FRUITS OR
OTHER CHO SOURCES)
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BASIC FERMENTATION IN DISTILLED BEVERAGES
• FERMENT CHO SOURCE WITH YEAST
• PRODUCE MODERATE ALCOHOL CONTENT (5-12%
• DISTILL LIQUID TO CONCENTRATE
• MODIFY CONCENTRATED LIQUID (FLAVOR WITH SPICES,
HERBS OR AGED IN WOOD BARRELS)
• ADJUST ALCOHOL CONTENT
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FERMENTING GRAINS: BEER MAKING
Mash (malt is
heated and
dried,cracked and
steeped Wort
Cooled Wort
Beer
Hops (vine, Humulus lupulus)
added to
boiling wort to
provide bitterness
and aroma
Fermentation adds:
Ethanol (flavor)
CO2 (carbonation)
Fermentation by-products:
Organic molecules that contribute
to a beer’s distinctive character
Saccharomyces
Cerevisiae (yeast)
Malted barley
(steep in water
until
it germinates)
+
Cereal grains
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FERMENTING FRUIT - WINE
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FERMENTING OTHER BEVERAGES
• COFFEE
• COCOA
• TEA
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CACAO BEAN FERMENTATION
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FERMENTED SOY
• FERMENTED TOFU
• MOLDS IN THE ACTINOMUCOR AND MUCOR FAMILY
• SOY SAUCE
• CONDIMENT PRODUCED BY FERMENTING SOYBEANS
WITH ASPERGILLUS ORYZAE OR ASPERGILLUS SOJAE
MOLDS
• TEMPEH
• (INDONESIAN) WHOLE SOYBEANS AND A
FERMENTATION STARTER CONTAINING THE SPORES OF
FUNGUS RHIZOPUS OLIGOSPORUS
• MISO
• JAPANESE SEASONING PRODUCED BY FERMENTING
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KIMCHI DEMO• NAPA CABBAGE, SALT, RED CHILI PASTE, GREEN ONIONS,
RADISH, CARROTS, GINGER, GARLIC, ETC…