Presentation on theme: "Microbes can be beneficial to us?!?"— Presentation transcript:
1 Microbes can be beneficial to us?!? Useful MicrobesMicrobes can be beneficial to us?!?
2 Useful MicrobesThere are billions of microbes and lots more we haven’t discovered yetMost of these microbes are eitherNecessary for our survivalGood for usCan be used for our benefit in industry
3 In Nature Microbe – plant Interaction Many microbes are found in nature and help plants to growRhizobacteria found in the soil fixate nitrogen which is required for many crops to growRootsMicrobes
4 In Nature Oxygen production Cyanobacteria or ‘blue-green algae’ produce oxygen in the ocean
5 In Nature Decomposition Defined as the breakdown of raw organic materials to a finished compostThe fungi invade the organic matter in soils first and are then followed by bacteria.Without this recycling of inorganic nutrients, primary productivity on the globe would stop.
6 In the Food Industry Cheese and yogurt Bread and dough products Lactic acid fermentation produces yogurt and cheese. Some fungi are also used to make the cheese turn blue!Bread and dough productsYeast is used to make bread and dough products.Alcohol ProductionYeast is also used in alcohol production when fermentation occurs without airLactobacilli bacteria used in yogurt and cheese makingSaccharomyces cerevisiae yeast used in bread making and alcohol production
7 In the Food Industry Fermentation A process during which the bacteria break down the complex sugars into simple compounds like carbon dioxide and alcohol.Fermentation changes the product from one food to another.
8 The fungus Penicillium produces the antibiotic Penicillin In MedicinePenicillinDiscovered by Alexander Flemming in 1928Produced by the fungus Penicillium notatumOne of the most commonly used antibiotics todayVaccinesDiscovered by Edward Jenner in 1796Usually made from weak or inactive versions of the same microbes that make us illThe fungus Penicillium produces the antibiotic Penicillin
9 Probiotics What are they? Live microorganisms which when administered in adequate amount confer a health benefit on the hostWhat type of bacteria are they?Lactobacilli which are part of the beneficial natural microflora found in the human gut
10 Probiotics How do they work? Interacting directly with the disease-causing microbes, making it harder for them to cause diseaseReinforce the natural barrier of the digestive tract protecting against pathogenic microbes"Competitive exclusion" in which beneficial microbes directly compete with disease-causing microbes for food and other resources, eventually crowding them outInteracting with and strengthening the immune system