bacteria could you successfully stain with an \"Acid Fast Technique?\" 13. Which
ID: 164917 • Letter: B
Question
bacteria could you successfully stain with an "Acid Fast Technique?" 13. Which Escherichia coli B. Bacillus subtilis C. Mycobacterium tuberculosis D, Vibrio cholerae E. Mycopl pneumoniae asma of the following bacteria fit this description: The endospores are widespread in the soil and the entry portal into the bost body is usually a wound? Select one. Escherichia coli B. Clostridium tetani C, Bordetella pertussis D. Staphylococcus aureus E. Mycobacteria tuberculosis 15. Which bacteria produce the described: The toxin is absorbed in the gut and carried out the blood to peripheral nerve synapses, where it blocks the release of acetylcholine, producing faccid paralysis. Select one. A. Bordetella pertussis B. Clostridium tetani C. Bacillus anthracis D. Clostridium botulinum E. Haemophilus influenzae 16. Regarding Listeria monocytogenes, select the true statement. Select one. A. Grows well in refrigerated food items B. Infections are most often transmitted through respiratory droplets. C. L monocytogenes shows pink with Gram Stain. D. L monocytogenes is an anaerobic spore former. 17. Select features that are true for E. coli. Select one. A. E coli grows in the intestines as well as the soil. B. E coli has acid associated with the outer membrane. C. There is little variability in virulence among different isolates of E coli. D. E coli infection can lead to hemolytic uremic syndrome. 8. The pathogenesis of which one of the following organisms is MoST likely to involve the nvasion the intestinal mucosa? A. Vibrio cholerae B. Shigella C. Bacillus cereus D. Clostridium botulinum E. Treponema pallidumExplanation / Answer
1. The correct answer is C (Mycobacterium tuberculosis). Acid-fastness is the physical property of certain bacteria, specifically their resistance to decolorozation by acids. The high mycolic acid content of certain Protozoa cell walls, and those of Mycobacteria, is responsible for the staining pattern of poor absorption followed by high retention.
2. The correct answer is Clostridium tetani (Option B). Tetanus is caused by an infection with the bacterium Clostridium tetani, which is commonly found in soil, saliva, dust and manure. The bacteria generally enters through a break in the skin such as cut, wound or puncture.
3. The correct answer is Option D (Clostridium botulinism). Botulisnism is a serious illness that causes flaccid paralysis of muscles. It is caused by a neurotoxin, produced by the bacterium Clostridium botulinism.
4. The correct answer is option A (Grows well in refrigerated food items). Listeria monocytogenes is a non-spore forming, anaerobic bacterium. It is Gram-positive, so stained purple with gram's stain. Also, it has ability to grow at 0oC, that is why it grows well in refrigerated food items.
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