This particular type of agar only allows for the growth of gram negative rods. In performing this particular test‚ distinguishing factors between lactose fermenters and non-lactose fermenters can be shown. If the organism applied to the agar produces orange colonies‚ and if the area around the bacteria turns orange
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Microbiology: study of small living things study of bacteria: bacteriology study of viruses: virology study of parasites: parasitology study of fungi: mycology NOT ALL BACTERIA ARE PATHOGENS (disease causing) antibiotic: used to treat bacterial infections and diseases (penicillin‚ mold‚ 1929) bioremediation: using bacteria to clean up toxins pathogenesis: ability of an organism to be pathogenic virulence factors: toxins‚ receptors‚ cellular composition innate immune response v.s
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3.3 Microbiological Analysis 3.3.1 Bacteria count using Heamocytometer This method was used to determine the of three types of dessert but does not differentiate the type of bacteria. 25 g of food samples will be homoginesed in a sterile stomacher bag and shaken for two minutes with 225 ml of peptone water to obtain the food mixture. Using separate sterile pipets‚ decimal dilutions of 10-2‚ 10-3‚ 10-4‚ 10-5 will be prepared and others as appropriate‚ of food homogenate by transferring 10 ml of previous
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Eubacteria - can be differentiated by Gram staining Gram positive: purple-blue‚ mostly peptidoglycan susceptible to penicillin Gram negative: pink-red‚ less peptidoglycan‚ has lipopolysaccharides‚ susceptible to EDTA Gram negative can be further differentiated into chlorophyllous (cyanobacteria) and achlorophyllous. Based on Gram staining Gram negative Escherichia coli Rhizobium Spirillum Pseudomonas Nostoc - cyanobacteria Oscillatoria - cyanobacteria Gram positive Staphylococcus aureus
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CHAPTER ONE INTRODUCTION AND LITERATURE REVIEW 1.0 Ginger Ginger is a knotted‚ thick‚ beige underground stem (rhizome). The stem extends roughly 12 inches above ground with long‚ narrow‚ ribbed‚ green leaves‚ and white or yellowish-green flowers. The important active components of the ginger root are thought to be volatile oils and pungent phenol compounds (such as gingerols and shogaols). 1.1 Parasitological examination of stool specimen This is the examination of intestinal parasites
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Screening and identification of rhizobacteria isolated from heavy metal contaminated soils INTRODUCTION As a result of human activities such as mining‚ agriculture and industrial activity‚ heavy metal pollution has become one of the most serious environmental problems today. Elevated levels of heavy metals not only decrease soil microbial activity and crop production‚ but also threaten human health through the food chain. Soil microorganisms can degrade organic contaminants‚ while metals need
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Our main goal was to test organisms’ resistance and susceptibility to bacteria‚ and whether the cell wall of bacteria exposed the membrane to pathogen or protect it from pathogens. I thought P. aeruginosa was gram-positive and therefore it would be susceptible. That was my hypothesis.We divided antiseptic agar plate into quadrants and divided antibiotics agar plate into six areas. We wrote the organisms’ name‚ date‚ and the temperature on the bottom of the agar plates. For antiseptic‚ our group used
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Name Microbiology 2210 Answer Key Practice Test 1 Directions: Choose the most correct response to answer the statement. ___1. Archaea a. belong to the kingdom Protista b. have petidoglycan in their cell walls c. belong to the domain Bacteria
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Plasmodium‚ Trypanosoma Algae: Diatoms‚ Spirogyra‚ Volvox Helminths: Tapeworm‚ fluke Fungi: Methylene blue stain of yeast cells (Saccharomyces)‚ sporangiospores of Rhizopus‚ conidiospores of Penicillium Staining Labs (3-6‚ 3-7‚ 3-8‚ and 3-9) – Identify and correctly interpret the following: Lab 3-6: Gram stain Lab 3-7: Acid Fast stain Lab 3-8: Capsule stain Lab 3-9: Endospore stain Metabolic Tests: Lab 5-1: O-F Glucose (aerobic versus fermentative organisms) Lab 5-2: Phenol Red broth for sugar
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common between Archaea and Bacteria. In terms of their cell structures‚ Archaea are indistinguishable from Gram-positive bacteria. Within prokaryotes‚ only these two groups of organisms are bounded by a single unit lipid membrane‚ and they generally contain a thick sacculus of varying chemical composition. Some Archaea also show positive Gram staining and a few of them‚ similar to certain Gram-positive bacteria‚ do not contain any cell wall (Bacterial‚ 2006). The similarity between Archaea and Bacteria
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