Slidesfinder is a sharing website for PowerPoint presentations search and share. They are also very versatile organisms, surviving in extremely inhospitable conditions. We don’t have access to users’ Facebook password. & IT’S STRUCTURE i) Facultative thermophiles: grow over a wide range of temperatures covered by mesophiles and obligate thermophiles and below. Inactive member won’t be able to Fastidiousness: Certain bacteria have specific O2/CO2 requirements, need special media or grow only intracellularly. Current classification is primarily based on morphology and biochemical characteristics of bacteria. for easy sharing of PowerPoint presentations, ensuring that these presentations get maximum exposure. library of professional ppt presentations. So the piluses are these little structures on the side of the bacteria. Either they may remain as a single cell or may aggregate together for various configurations. If the cell wall is rigid they are classified into free living bacteria i.e. The uploader spent his/her valuable time to create this Structure of Bacteria powerpoint presentation slides, to share his/her useful content with the world. Read More, Published on : Mar 14, 2014 PowerPoint is the world's most popular presentation software which can let you create professional Structure of Bacteria powerpoint presentation easily and in no time. b. Bacteria are very difficult to study microscopically unless stained. store their respective email addresses for becoming registered member of Slidesfinder.com. So, the bacterial species which take up the blue color during gram staining are called gram +ve and those which take up an orange are called gram -ve bacteria. h) Obligate thermophiles: grow between 38°C and 82°C. Cohn divided the bacterial into four types based on their shapes in 1872. Cell wall (Peptidoglycan) 3. Fill all required fields and you will be a registered member of slidesfinder. Binary Fission It's save your time :). Laboratory diagnosis gram positive and gram negative cocci, Introduction to bacteria, structure and function, Cell structure of bacteria and normal flora, No public clipboards found for this slide, CLASSIFICATION OF BACTERIA & IT’S STRUCTURE. It is also known as a microbe.  1. State what criteria are used in viral classification. 26 Useful Bacteria Other uses for bacteria include making yogurt, cheese, and buttermilk.  Bacteria can be classified into six major groups on morphological basis. our users who have confirmed their slidesfinder login email. ... divides based on cell wall structure, shape, arrangement, and physiological traits; 16 Species and Subspecies. BY Antigenic variation B. Cytoplasmic components Regarding the naming of enzymes involved in the replication of viral nucleic acid, state what the "dependent" part of the name refers to and what the "polymerase" part of the name refers to. 27 Flagella Bacteria that are motile have appendages called flagella Attached by Basal Body A bacteria can have one or many flagella, 29 Flagella Made of Flagellin Used for Classification Monotrichous: 1 flagella Lophotrichous: tuft at one end Amphitrichous: tuft at both ends Peritrichous: all around bacteria, 30 Monotrichous Lophotrichous Amphitrichous Peritrichous. Most bacteria often have the protective outer most area which is called the capsule. (2) Because there are so many gram-negative rods, they are divided into three categories: respiratory organisms, zoonotic organisms, and enteric and related organisms. Current classification is primarily based on morphology and biochemical characteristics of bacteria. This classification is done on the basis of shape, cell wall, flagella, nutrition and morphology. Appendages 5. TRUE BACTERIA  Cocci – These are spherical or oval cells. educationists and others anywhere around the world, and lightning fast. Classifies bacteria by cell wall composition, morphology, biochemical tests, differential staining, etc. They're these little tubes, really. They are extremely tiny thus they cannot be seen individually unless viewed through microscope. DHAKA MEDICAL COLLEGE. and educationists. It has a plant like cell-wall and autotrophic mode of nutrition. Facultative anaerobes: Those bacteria that do not require O2 but can use it if available. One of the piluses can connect from one bacteria to another, and then essentially you have a mixing of what's inside one bacteria with another. If you continue browsing the site, you agree to the use of cookies on this website. 9 Classification of Microorganisms Important in the Food Industry: Bacteria, Yeasts and Mold g) Mesophiles: require a temperature below 38°C for growth. Classification of virus on the basis of genetic material present, presence of a number of strands, presence of envelope, capsid structure, shapes of the viruses, types of host, mode of transmission, replication properties, site of replication and Baltimore Classification. Bacteria have three ways of obtaining energy; photosynthesis, chemosynthesis or Heterotropism. The staining characteristics of bacteria in the Gram stain are very useful in classification. Find your interest in the form of powerpoint 1) Slime (extracellular polysaccharide): This is extracellular material, loosely associated with the bacteria, that is elaborated by some bacterial species that facilitates colonization of smooth, prosthetic surfaces such as intravascular catheters. 32 Pili Short protein appendages Smaller than flagella Adhere bacteria to surfaces Used in conjugation for Exchange of genetic information Aid Flotation by increasing buoyancy, 35 Shapes Are Used to Classify Bacillus: Rod shaped Coccus: Spherical (round) Vibrio: Comma shaped with flagella Spirillum: Spiral shape Spirochete: wormlike spiral shape, 37 Grouping of Bacteria Diplo- Groups of two Strepto- chains Staphylo- Grapelike clusters, 50 Archaebacteria Lack peptidoglycan in cell walls Have different lipids in their cell membrane Different types of ribosomes Very different gene sequences, 51 Archaebacteria Archaebacteria can live in extremely harsh environments They do not require oxygen and can live in extremely salty environments as well as extremely hot environments Called the Ancient bacteria, 52 Archaebacteria Subdivided into 3 groups: Methanogens Thermoacidophiles Extreme Halophiles, 53 Methanogens Live in anaerobic environments (no oxygen) Get energy by changing H2 & CO2 into methane gas Found in swamps, sewage treatment plants, digestive tracts of animals, 54 Methanogens Break down cellulose in a cow’s stomach Produce marsh (methane) gas, 55 Extreme Halophiles Live in very salty water Use salt to generate ATP (energy) Dead Sea, Great Salt Lake inhabitants, 56 Thermoacidophiles or Thermophiles Live in extremely hot environments Found in volcanic vents, hot springs, cracks on ocean floor that leak acid, 58 Characteristics 3 basic shapes (coccus, bacillus, spirilla) Most are heterotrophic (can’t make their own food) May be aerobic or anaerobic Identified by Gram staining, 59 Gram Staining Developed in 1884 by Hans Gram Bacteria treated with purple Crystal Violet & red Safranin stains Cell walls either stain purple or reddish pink, 60 Gram Positive Have thick layer of peptidoglycan (protein-sugar complex) Single lipid layer Stain purple Can be treated with antibiotics, 61 Gram Positive Bacteria Lactobacilli (makes yogurt & buttermilk) Actinomycetes (make antibiotics) Clostridium (lockjaw bacteria) Streptococcus (strep throat) Staphylococcus (staph infections), 62 Gram Negative Bacteria Thin layer of peptidoglycan in cell wall Extra thick layer of lipids Stain pink or reddish Hard to treat with antibiotics Some photosynthetic but make sulfur not oxygen Some fix nitrogen for plants, 63 Gram Negative Rhizobacteria grow in root nodules of legumes (soybeans, peanuts) Fix N2 from air into usable ammonia, 64 Gram Negative Rickettsiae are parasitic bacteria carried by ticks Cause Lyme disease & Rocky Mountain Spotted Fever, 65 Cyanobacteria Gram negative Photosynthetic Called blue-green bacteria Contain phycocyanin (red-blue) pigments & chlorophyll, 66 Cyanobacteria May be red, yellow, brown, black, or blue-green May grow in chains (Oscillatoria) Have Heterocysts to help fix N2 First to re-enter devastated areas Some cause Eutrophication (use up O2 when die & decompose in water), 68 Spirochetes Gram positive Flagella at each end Move in corkscrew motion Some aerobic; others anaerobic May be free living, parasitic, or symbiotic, 69 Enteric Bacteria Gram negative Can live in aerobic & anaerobic habitats Includes E. coli in intestines Salmonella – causes food poisoning, 70 Chemoautotrophs Gram negative Obtain energy from minerals like iron Found in freshwater ponds, 71 Nutrition, Respiration, and Reproduction, 72 Modes of Nutrition Saprobes – feed on dead organic matter Parasites – feed on a host cell Photoautotroph – use sunlight to make food Chemoautotroph – oxidize inorganic matter such as iron or sulfur to make food, 73 Methods of Respiration Obligate Aerobes – require O2 (tuberculosis bacteria) Obligate Anaerobes – die if O2 is present (tetanus) Facultative Anaerobes – don’t need O2, but aren’t killed by it (E. coli), 74 Bacterial Respiration Anaerobes carry on fermentation Aerobes carry on cellular respiration, 75 Reproduction Bacteria reproduce asexually by binary fission Single chromosome replicates & then cell divides Rapid All new cells identical (clones), 76 Cellular organism copies it’s genetic information then splits into two identical daughter cells, 78 Reproduction Bacteria reproduce sexually by Conjugation Form a tube between 2 bacteria to exchange genetic material Held together by pili New cells NOT identical, 80 Spore Formation Form endospore whenever when habitat conditions become harsh (little food) Able to survive for long periods of time as endosperm Difficult to destroy (heat resistant), 81 Transduction & Transformation Genetically change bacteria May become antibiotic resistant Transformed bacteria pick up pieces of DNA from dead bacterial cells Transduction – viruses carry foreign DNA to bacteria; used to make insulin, 83 Pathogens Called germs or microbes Cause disease May produce poisons or toxins Endotoxins released after bacteria die (E. coli) Exotoxins released by Gram + bacteria (C. tetani). Bacteria have a cellular structure are prokaryotes and unicellular with three distinctive shapes – coccus (spherical), bacillus (rod shaped) and spirillus (spiral shaped). be displayed on your uploaded presentation. Home / Health & Wellness / Health & Wellness Presentations / Structure of Bacteria PowerPoint Presentation. Users need not worry about security when accessing SlidesFinder Yes, it’s absolutely safe sign-in. SlidesFinder Classification of Bacteria by shape or cell structure. 1. Re-productivity of content are not allowed. This helps you give your presentation on Structure of Bacteria in a conference, a school lecture, a business proposal, in a webinar and business and professional representations. These bacteria carryout only oxidative type of metabolism. Infolding theory 2. Bergey’s Manual of Systematic Bacteriology. TABLE 5–1 Classification of Medically Important Bacteria (1) Only organisms that are described in this book in the section on medically important bacteria are included. In the year 1872 scientist Cohn classified bacteria to 4 major types depending on their shapes are as follow: 1) Cocci: These types of bacteria are unicellular, spherical or elliptical shape. Leave a Comment / Uncategorized / Uncategorized •bilayer structure unique among biologic membranes. Examples; Mycobacterium, Bacillus; 2. Now customize the name of a clipboard to store your clips. Bacilli: rods , 0.5-1 m in ... however, in certain bacilli they are composed of ... Bacillus and Clostridium. Following present classification, there are a little less than 9,300 known species of prokaryotes, which includes bacteria and archaea. without filling any form, required detail automatically will be fatch from your account. Discovered by H.C. Gram in 1884 it remains an important and useful technique to this day. •i.e., it maintains the bacterial structure and is a permeability barrier to large molecules. Other shapes will be considered later in the course. It’s a great marketing Without prior written permission from author, commercial use of any content is illegal. Bacterial taxonomy is the taxonomy, i.e. So, start sharing knowledge and we are here to make that immortal !! No*, you can login with your account without confirmation. Extracellular polysaccharides: capsules, microcapsules and loose slime 4. About 5 percent of the length of the virion is depicted. Very difficult to study microscopically unless stained we shall go on details about the classification of bacteria the! Have access to numerous presentations on varied subjects the classification of bacteria & it ’ S a way structure and classification of bacteria ppt... We have created this platform for easy sharing of PowerPoint presentations online for free and.. 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