PPT-Bacteria

continued Gram Stain When bacteria are treated with a dye made up of crystal violet and iodine they react in one of two ways Bacteria cells that appear purple are grampositive and bacteria that change to pink are gramnegative . Monera. Learning Objectives. Name 3 types of bacterial cell. Explain reproduction of bacteria. Explain nutrition of bacteria. State the factors affecting growth of micro-organisms. Define the term pathogenic. Lunch and Learn. May 7, 2015. Deb . Kirchhof. -Glazier. The U.S. is #1 in the world for health care expenditure but…. We are 53 . out of all 228 nations/territories on the globe for . life . expectancy. Derya. . Ozuolmez. HMC 2012. Sulfate reducers,. Strict . anaerobes. ,. Belong to 4 phylogenetic lineages;. Delta-. proteobacteria. , . thermophilic. . Gram (-) bacteria. , . Gram (+) . bacteria, . Euryarchaeota. Mackenzie Abate. 9. th. Grade. Problem/Rationale. Does saliva have an effect on bacteria?. If so, what is this effect?. Also, I have always heard people say “a dog’s mouth is cleaner than a human’s.” By testing the saliva’s effect on bacteria, I tested the cleanliness of the mouth. . Mrs. Stewart. Medical Interventions. Central Magnet School. Bacteria and Antibiotics. Essential Questions:. How do antibiotics work?. How do bacterial cells gain resistance?. 2 Classes of Bacteria. Gram (-) . Helpful Bacteria. Most bacteria are harmless to humans.. Many are useful:. Aid in digestion. Provide nutrients for plants by breaking down dead material by decomposition. Provide drugs and hormones. Provide some types of food.. Structure and Function. 2. Prokaryote & Eukaryote. Evolution. 3. Cellular Evolution. Current evidence indicates that . eukaryotes evolved from prokaryotes. between 1 and 1.5 billion years ago. Two theories:. SSEP Mission 4 to the International Space Station. Response of Antibiotics and Bacteria in a Microgravity Environment. Co-Principal investigators: Paxton Ellul, Ashley Miller, and Haley Dole. 12 grade. Dr. Yasir . A. Hussein, MD, Microbiology & Pathology. . Update, September 2016. Overview. . Introduction to anaerobic bacteria.. Types of . anaerobic . . 19, . Ch. 23, and more . Bacteria & Virus Overview. Interesting stuff!. We live with bacteria and viruses constantly, but most people don’t know much about them.. In this chapter we learn both the good and bad of each.  . Bacteria form a large group of parasitic, saprophytic, and free-living microorganism .  . 1. Bacterial cell wall (protects against osmotic damage).  . Bacterial cell is prokaryotic. Contains high concentration . Lack a nucleus. DNA is naked, a single loop not bound in a chromosome. May contain plasmids (small circular fragments of DNA). Have ribosomes, but no other organelles.. DNA present as a long circular molecule.. Simple, one-celled organisms. Multiply rapidly. Killed by antibiotics. Some have become antibiotic resistant. Classified by shape & arrangement. Shapes of Bacteria. Bacteria Classes. Cocci. =round or spherical. E. coliTotal coliformTotal coliform = Environmental contaminationFecal coliformFecal coliform and E. coli = Fecal contaminationE. coli O157:H7 You should test for coliform bacteria at least once a yea