Which of the following is taken up by M cells of the large intestine, escapes out the bottom of the M cell and then enters epithelial cells from the bottom or basal side, grows in their cytoplasm of epithelial cells and can spread to neighbor cells by an actin tail-based motility? O Vibrio cholerae Salmonella Giardia lamblia O Shigella Helicobacter pylori
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- The cell wall of Mycobacterium tuberculosis allows nutrients and certain drugs to pass slowly and make tubercle bacilli resistant to detergents and strong acids. What characteristic does this wall have to become so? O Hydrophobic structure O Thick peptidoglycan layer O High protein content O None of mentionedSome bacteria secrete chemicals that prevent the phagocytic digestion of a bacterium by interfering with the fusion of _____ to the phagosome. View Available Hint(s) for Part F the bacterium a lysosome pseudopods a lipopolysaccharide layer (LPS)Some S. aureus stains have a number of virulence factors including O Lipase which convey resistance to lipids and staphlokinase which clots the blood. O Lipase which digests lipids and B-lactamase which breaks the matrix between cells. O coagulase which dissolves blood clots and staphlokinase which clots the blood. coagulase which clots the blood and B-lactamase which conveys resistance to penicillin. Question 26 A patient has an infection caused by a bacterial species that produces Deoxyribonucleases, M protein, Streptokinases, Streptolysin S, Exotoxin A, and Hyaluronidase. Which disease does this person have? O Shigellosis O Necrotizing fasciitis O Pertussis Rabies 12 MacBook Air ....
- Helicobacter pylori is able to use urease to neutralize the stomach environment because the enzyme produces: acids O bases • carbons amino acidsWhich of the following bacteria can cause intestinal infection in human? ETEC EHEC EAEC All of the above None of the above What will happen if we add a drop of 3% hydrogen peroxide on Staphylococcus aureus culture? Bubbles will be produced. Bacterialclumpingwillform. Therewillbeacolorchangeinthebacterialculture. Afibrinclotwillbeformed. No observable change.In 2005, J. Robin Warren and Barry J. Marshall shared theNobel Prize in Medicine for discovering the bacteriumHelicobacter pylori and for establishing experimental proofthat it plays a major role in gastritis and peptic ulcer disease.The story began when Warren, a pathologist, noticed thatbacilli were associated with the tissues taken from patientssuffering from ulcers. Look up the history of this case and describeWarren’s first hypothesis. What sorts of evidence did ittake to create a credible theory based on it?
- A highly conserved endotoxin of gram negative bacteria is? Lipid A adhesin protease phospholipase endosporinIn this pandemic COVID Patient infect with a virus Why these patient show increase in Ferritin level Explain the mechanism Why in infection or inflammation ferritin level increased?The anitbiotic penicillin is effective against bacteria by _____. inhibiting the sunthesis of peptidoglycan blockimng the adhesion of the capsule to the substrate inhibiting the formation of fimbriae blocking the operation of the proton pump Interfering with conjugation
- hich of the following can produce inactive endospore-like bodies that are infectious to human epithelial cells? Rickettsia Echrlichia Bartonella Chlamydia CaulobacterThe most pathological effects of E. histolytica is * Tissue destruction by protolytic enzyms Proliferate inside the macrophages intracellularly Attached on the epithelial cell of the small intestineWhat feature of mycobacteria is responsible for the unusually slow growth of these bacteria? They have limited numbers of ribosomes so protein production is slow. They cannot fully metabolize carbohydrates and must rely on fermentation. They lack a cell wall and are extremely fragile. The mycolic acid in their cell walls requires signification metabolic investment. Their low tolerance for oxygen retards their growth.