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- V e. kidney stones Which of the following microorganisms require the major available (aW) of water to proliferate? ¿Cuál de los siguientes microorganismos requiere la mayor cantidad de agua disponible (aW) para proliferar? O Penicillium spp. O Xeromyces spp. O Escherichia coli O Pseudomonas aeruginosa O Staphylococcus aureus Mention and describe the two types of bacterial resistance to antibiotics. Mencione y describa los dos tipos de resistencia bacteriana a los antibióticos. A-A bacterium has the following characteristics:∙ It adheres to the human intestinal lining using a feature that protects it from phagocytes, bacteriophages, and dehydration∙ It can survive being boiled∙ It contains no plasmids and relatively little peptidoglycanWhich of the following characteristics allows this bacterium to adhere to the intestinal lining? Group of answer choices A. fimbriae B. pili C. an endospore D. a flagellumDefine the following terms:a. endotoxinb. periplasmic spacec. biofilmd. slime layere. bacterial capsule
- endotoxins are: a. excreted from within the cell b. specific in their method of actino depending on the particular endotoxin c. associated with gram-positive bacteria d. part of a particular type of cell wall copmosed os lopolusaccharides e. none of the aboveWhich of the following statements is incorrect regarding Gram negative bacteria Select one: O a. Lipopolysaccharide layeris present Ob. All of the mentioned above O c. Cell wall lipid content is very low O d.Cell waIlhas a thin peptidoglyean layerWhich of the following effects is/are caused by formation of aninfectious biofilm?a. disseminated infection b. failure of drug therapy c. colonization of tissues d. a and b e. b and c f. all of these
- Complete the table: Bacterium Shape of cell Arrangement of cells Other important cell feature Distribution Importance A. Escherichia coli B. Staphylococcus aureus C. Streptococcus pyogenes D. Clostridium botulinum E. Salmonella typhiEvery year, supposedly safe municipal water supplies causeoutbreaks of enteric illness.a. How in the course of water analysis and treatment might thesepathogens be missed?b. Why is there less tolerance for a fecal coliform in drinking orrecreational water than for other bacteria?Process where waste materials are digested by microorganisms is called Which term is appropriate for the blank? Lütfen birini seçin: O a. Bioremediation O b. Biological bleaching O c. Biodegradation O d. Conversion O e. Fragmentation
- a) Biofilm is: a. a complex established community of microorganisms on solid surfaces b. is a layer of millions of identical bacteria on solid surfaces c. is a layer of compounds released from the tissue as a protection against pathogenic microorganisms d. All of these are correct b) Capsule formation is associated with the virulence of pathogenic bacteria. Why? Select all that apply. a. They are sticky and attach better b. They can escape phagocytosis c. The capsule makes them grow/multiply faster d. They kill immune cells1. Mucous membranes are barriers against colonization and growthof microorganisms. However, mucous membranes, for examplein the mouth and gut, are colonized with a variety of differentmicroorganisms, some of which are potential pathogens. Explainhow these potential pathogens are controlled under normalcircumstances. Then describe at least one set of circumstances thatmight encourage pathogenicity.Diseases that involve biofilm-producing bacteria are of serious concern. They are not as easily treated compared with those involving free-floating (or planktonic) bacteria. Explain three reasons why biofilms can be more pathogenic.