7. The ability of some microbes, such as Trypanosoma or Giardia to alter their surface molecules and evade destruction by the host's antibodies is called: cytopathic effect lysogenic conversion antigenic variation
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7. The ability of some microbes, such as Trypanosoma or Giardia to alter their surface molecules and evade destruction by the host's antibodies is called:
cytopathic effect
lysogenic conversion
antigenic variation
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- 45. Host defenses In the process called concentration gradients of microbial substances and inflammatory mediators guide phagocytes to the area of microbial invasion. diapedesis chemotaxis margination inflammation55. Substances such as Lipid A of LPS which trigger fever production which may help inhibit pathogen replication and speed up chemical reactions involved in host defenses are called pyrogens C Reactive Proteins,/CRP pyogens O leukocidinsIn which of the following cases would treating a patient with an antiserum (purified antibodies) be more helpful than treating them with other drugs? If the person has a fungal skin infection Purified antibodies would not be helpful in any of these cases If the person has eaten a poison produced by bacteria If the person has a viral hepatitis infection
- Describe the ways in which each of the following pathogens can disarm their host’s immune system or manipulate it to their own advantage:a. Pathogenic strains of Staphylococcusb. Enveloped virusesportal of entry opportunistic Infection morbidity pathogen healthcare-associated infection virulence factors pathogenicity toxemia Entry into the host by a which can cause disease in a healthy host pathogen can be via a which can cause disease in an immunocompromised host which can establish can lead to attachment and avoidance of host defenses, which depend on may be caused by normal biota may be caused by drug- resistant microbes such as enzymes and toxins that may trigger may enhance which together with fever other signs and symptoms define a Reset55. Identify a MISMATCHED pair from the following, Group of answer choices lethal factor :::: protease activity; inhibits chemokine production. edema factor :::: unregulated cAMP synthesis protective antigen :::: binds and assembles at target cell membrane protective antigen :::: acts as a biosensor ; detects higher temperature of the digestive system to become active protective factor :::: aids in bringing other toxins components inside cell via endocytosis 56. Which of the following holds TRUE for blood agar medium? Group of answer choices gamma hemolysis is when there is no effect on red blood cells. alpha hemolysis is due to complete breakdown of red blood cells beta hemolysis is the incomplete breakdown of red blood cells. we always use human red blood cells in blood agar blood agar medium belongs to selective media
- 2. A pharmacologist discovers a new fungal metabolite with unusual antimicrobial properties. It naturally concentrates in the endosomes, lysosomes, and phagolysosomes of cells and directly kills microorganisms (eg, Mycobacterium tuberculosis) that are normally resistant to degradation in the phagolysosomes. It has the undesirable effect of raising the pH within phagolysosomes. Which of the following processes will be primarily affected? A) Class I MHC molecule peptide loading o B) Class II MHC molecule peptide loading C) B-Microglobulin surface expression D) Peptide binding to TCRaß E) Peptide binding to TCRYSThe coating which some bacteria secrete to hide their antigen is referred to by 3 terms, give one as the answerAll of the following are methods intracellular pathogens can use to survive inside a host cell EXCEPT create a capsule. Escape the phagosome. survive in the phagolysosome. prevent phagosome-lysosome fusion.
- Can a mouse infected with Bacillus anthracis generate antibodies against the S-layer? How do you know? I need help finding the answer in the article and explain in short answer link to article: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC106848/In which of the following cases would treating a patient with an antiserum (purified antibodies) be more helpful than treating them with other drugs? Group of answer choices Purified antibodies would not be helpful in any of these cases If the person has a viral hepatitis infection If the person has eaten a poison produced by bacteria If the person has a fungal skin infectionIn 2013, there was an outbreak of methicillin-resistant Staphylococcusaureus (MRSA) at an NFL training facility. One player suffereda career-ending infection to his foot and sued the team owners for $20 million for unsanitary conditions that contributed to the bacterialinfection. A settlement with undisclosed terms was reached in2017. MRSA is highly contagious and is spread by direct skin contactor by airborne transmission and can result in amputation or death.In addition, MRSA is very difficult to treat because it is resistant tomany antibiotics. For example, b -lactam antibiotics, such as penicillin,function by binding to and inactivating bacterial penicillin-bindingproteins (PBPs), which synthesize the bacterial cell wall. However,MRSA expresses an alternative type of PBP, called PBP2a encodedby the mecA gene. b -lactam antibiotics only weakly bind PBP2a,and thus cell wall synthesis can continue in their presence. Moreover,in a system somewhat analogous to the regulation of the…