8) Name the three basic shapes of the bacteria in the picture to the right. A B C a. b. 9) These bacteria in the picture to the left are called Staphylococcus aureus. Give two reason why is it called Staphylococcus. a. b.
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- 1) Which of the following apply(ies) to Bacillus cereus and Bacillus anthracis? Choose all that apply: a) B. anthracis forms spores while B. cereus does not b) B. cereus is more lethal when it causes an infection c) B. anthracis has extra-chromosomal DNA that makes it more pathogenic d) Despite their similar names, the two are actually not at all related e) The 16S rRNA gene sequences of these bacteria are more than 99% identical, meaning that they are actually members of the same speciesChoose one infectious disease from the list below and use the chain of infection to analyze how it is spread. A. Please provide a comprehensive description of cholera. B. Describe the chain of infection cholera. The chain of infection for the chosen infectious disease must clearly include the following: 1. Identification of a) the pathogen, b) the reservoir c) means of transmission d) the susceptible host 2. Describe how one could break the chain of cholera, such as breaking the pathogen link, by providing a specific intervention. 3. Include references and relevant data.About becterial enzymes, it is CORRECT to affirm that: a). Some becterial enzymes can help the microbe fight the immune system, by destroying lgA.b). Coagulases are enzymes that use the host's fibrinogen and form a semi-solid get that isolates amd protects the bacteria.c). Some bacterial enzymes such as hyaluronidase can help the microble move through the host's tissus by destroying the tissue's components.d). Fibrolysin is an enzymes that can help from blood clots.
- a. What are the distinctive morphological traits of Corynebacterium?b. How can the pseudomembrane be life threatening?c. What is the ultimate origin of diphtherotoxin?A. What is Pasteur’s “Germ Theory of Disease?. How did he discover this principle? B. What major obstacle did he have to overcome (A philosophical concept) to establish the validity of the theory.Use the dichotomous key in Table 10.2 to identify a gram-positive, catalase (No bubble) coccus. Table 10.2 1 Gram-positive A. Catalase+ 1. Acid from glucose. 2 Glucose-.....*** Micrococcus B. Catalase- 1. Coccus.. 2. Rod.... II. Gram-negative A. Oxidase- 1. Acid from lactose Lactobacillus Citrobacter Uses atric acid....... *.******. ******* a. b. Citric acid-. Escherichia 2. Lactose- a. H2S produced (1) Urease positive... (2) Urease negative... Proteus Salmonella B. Oxidase+ 1. Rod... ....** ..........* .. Neisseria svuomopn 2. . Coccus....* **** .....* ....** Neisseria Pseudomonas Staphylococcus Streptococcus A Moving to the next question prevents changes to this answer.
- 1- A. Define the term pathogen. In a table give the following information: B. Using MRSA, NOROVIRUS, ATHLETES FOOT and MALARIA as examples, identify the microorganisms (causal agent) involved in each disease. C. Provide some information on the microorganism for each disease e.g. structure D. How are these microorganisms transmitted from person to person. (200 words) 2.- In a paragraph explain A) What is resident flora? B) How might resident flora prevent infection AND cause infection? (150 words) 3 - In a paragraph describe Describe how the skin and mucous membranes play an integral role in helping the body protect itself against infection. (150 words)A child presents with yellow crusting lesions on the arms and legs. It is determined that this is being caused by Streptococcus pyogenes. In what ways is the organism Streptococcus pyogenes different from Staphylococcus aureus?Rod-shaped bacteria grouped in pairs:Question 7 options: a) streptococci b) diplobacilli c) bivibrios d) staphylobacilli
- During this outbreak, some people sickened with listeriosis testedpositive for Listeria monocytogenes in their bloodstream, but a DNAprofile of the bacterium showed that it was not the outbreak strain.What likely conclusion can be drawn from this information?a. It is a false positive. b. The person is not part of the outbreak.c. Listeria monocytogenes mutates frequently, making DNAprofiling unreliable.d. The person has already begun to recover from the disease.Mycobacterium tuberculosis is very difficult to stain because of the A) presence of ribosomes in the cytoplasm. B) location of the DNA within the cell. C) large amounts of a waxlike lipids present in its cell wall. D) lack of a cell wall.Different strains of Streptococcus pyogenes have different virulence factors, giving these microbes much versatility. Virulence factors include which of the following? Choose one or more: A.A capsule that, when thick, will help the organism avoid phagocytosis by macrophages B.A cell wall containing lipoteichoic acid, thought to facilitate adherence to pharyngeal epithelial cells C.Enzymes that lyse blood cells (streptolysins) D.The production of several endotoxins called streptococcal pyogenic endotoxins (SPEs)