Microorganisms and Disease Immunization with which of the following toxoid induces high titer serum antibody, but does not protect from the corresponding disease? Shigellosis Diphtheria Tetanus Botulism Shigellosis Diphtheria Tetanus Botulism ANSWER DOWNLOAD EXAMIANS APP
Microorganisms and Disease Cholera toxin is an A-B type toxin in which the B portions bind to a receptor on a host cell and the A portion enters the cell to cause ADP ribosylation of guanylate cyclase that stimulates production of cGMP ADP ribosylation of a G protein that locks it into an active form that stimulates adenylate cyclase to make cAMP cleavage of rRNA that results in disruption of ribosome function ADP ribosylation of adenylate cyclase that stops production of cAMP ADP ribosylation of guanylate cyclase that stimulates production of cGMP ADP ribosylation of a G protein that locks it into an active form that stimulates adenylate cyclase to make cAMP cleavage of rRNA that results in disruption of ribosome function ADP ribosylation of adenylate cyclase that stops production of cAMP ANSWER DOWNLOAD EXAMIANS APP
Microorganisms and Disease Lactoferrin helps to protect against pathogens by sequestering Iron facilitating the growth of normal flora blocking sebum production lowering the pH sequestering Iron facilitating the growth of normal flora blocking sebum production lowering the pH ANSWER DOWNLOAD EXAMIANS APP
Microorganisms and Disease Which of the following is common in the disease caused by Coryne-bacterium diphtheriae and Bacillus anthracis? The most serious disease symptoms are the direct result of toxin action Both organisms cause skin and respiratory tract infections Diphtheria toxin and edema toxin are ADP ribosylating toxins Both organisms are gram-positive spore formers The most serious disease symptoms are the direct result of toxin action Both organisms cause skin and respiratory tract infections Diphtheria toxin and edema toxin are ADP ribosylating toxins Both organisms are gram-positive spore formers ANSWER DOWNLOAD EXAMIANS APP
Microorganisms and Disease Type III secretion systems are used to inject "effector" proteins directly into a host cell. Salmonella uses a type III secretion system to help the pathogen to secrete LT (heat labile toxin) and ST (heat stable toxin) into the lumen of the intestine survive the acid pH of the stomach activate T cells to proliferate and secrete cytokines survive within macrophages secrete LT (heat labile toxin) and ST (heat stable toxin) into the lumen of the intestine survive the acid pH of the stomach activate T cells to proliferate and secrete cytokines survive within macrophages ANSWER DOWNLOAD EXAMIANS APP
Microorganisms and Disease What is common in catheters and ventilators? They predispose patients to viral rather than bacterial infections Bacteria responsible for associated infections are usually susceptible to antibiotics They bypass important defenses of the body They are used primarily in neonatal intensive care units They predispose patients to viral rather than bacterial infections Bacteria responsible for associated infections are usually susceptible to antibiotics They bypass important defenses of the body They are used primarily in neonatal intensive care units ANSWER DOWNLOAD EXAMIANS APP
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