positive and gram- negative) GRAM-POSITIVE GRAM-NEGATIVE Produce endotoxins. Contains lipid A. Presence of lipoproteins and lipids. Outer membrane is absent. Resistant to anionic detergents. Appears red/pink after gram staining. Multilayered peptidoglycan. Techoic acids are present. Easily destroyed by lysozymes. Contains 2 pairs of rings (flagella)
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- Because of a snowstorm, your regular laboratory session wascanceled and the Gram staining procedure was performed oncultures incubated for a longer period of time. Examination of the stainedB. cereus slides revealed a great deal of color variability, ranging from anintense blue to shades of pink. Account for this result.Imagine a microbiologist performed a series of Gram stains but forgot to perform the destain step during the stains. Which type(s) of erroneous results would the scientist observe? Cells that are actually gram-negative would appear gram-positive Cells that are actually gram-positive would appear gram-negative Both gram-negative and gram-positive cells would appear to be the oppositeA patient enters the clinic demonstrating signs and symptoms of meningitis. A spinal tap is performed and the collected cerebrospinal fluid Gram stained. The results of the Gram stain reveal the infection is bacterial in nature. Based on the micrograph provided, which of the following best represents the interpretation of these results? The bacteria are Gram-positive cocci The bacteria are Gram-positive rods The bacteria are Gram-negative cocci The bacteria are Gram-negative rods
- Describe the structure of the cell wall of a Gram-negative and a Gram-positive bacterium, respectively each cell wall also specify two cell wall components that can be recognized by the constitutive the immune systemWhich one of the following statements about the Gram stain is false? A-In the Gram stain, a dye called crystal violet is used to stain the cells purple. B-Gram positive cells end up being stained purple. C-Gram negative cells have thinner peptidoglycan layers than Gram positive bacteria. D-In the Gram stain, alcohol is used to kill the bacteria E-Gram negative cells end up being stained pink or red.which bacteria is Pleomorphicrod or clubshaped,gram positive, motile and passes the oxidase test? which bacteria is Coccobacillary,gram negative, non motile and negative oxidase test? which bacteria is Rods withparallel sidesand roundedends, gram negative, non motile and negative oxidase test? which bacteria is Coccoid assingles or inpairs, gram positive, non motile and negative oxidase test?
- one or your lab partners has followed the rrecommended procedure of running Gram-positive and Gram negative control organisms on her gram stain of an unknown species. Her choices of conrols were Escherichia Coli and Vacillus subtilis. She tries several times and each time concludes she is decolorizing too long because both controls have pink cells (one more than the other) What might you suggest and why?Which of the following is present in both gram-positive and gram-negative cell walls?a. an outer membrane b. peptidoglycanc. teichoic acidd. lipopolysaccharidesIf you saw large, eukaryotic cells in the preparation made of your gumline, they were most likely your own eptihelial cells. Are you gram-postitive or Gram- negative?
- A patient was admitted to the ER with severe virulent E. coli bacteremia and was given a high dose of intravenous ciprofloxacin antibiotic, to which the patient was not allergic. The patient develops fever and chills shortly afterward the administration of the antibiotic. Which of the following best describes the probable cause? Group of answer choices A. The Gram-negative E. coli released the endotoxin in the form of lipid A from the disintegrated lipopolysaccharides (LPS) upon death by the antibiotic leading to chills and fever. B. The Gram-negative E. coli released the endotoxin in the form of Protein A from the disintegrated lipopolysaccharides (LPS) upon death by the antibiotic leading to chills and fever. C. The Gram-positive E. coli released the endotoxin in the form of Protein A from the disintegrated lipopolysaccharides (LPS) upon death by the antibiotic leading to chills and fever. D. The Gram-positive E. coli released the endotoxin in the form of lipid A from the…Briefly describe the main scientific principle(s) underlying the following techniques used in the Combating Disease practical (you may use diagrams if you wish): ammonium sulphate precipitation Dialysis ImmunoelectrophoresisDifferences between Gram + and – and examples. Describe at least two diseases for each, signs, symptoms