Microorganisms and Disease The influenza vaccine is administered each year because None of these the vaccine is sufficiently toxic to make it necessary to administer only a small amount at any one time mutations in the viral hemagglutinin may allow the virus to evade the immune response elicited by previous vaccines it is a polysaccharide vaccine that does not confer long-term protection None of these the vaccine is sufficiently toxic to make it necessary to administer only a small amount at any one time mutations in the viral hemagglutinin may allow the virus to evade the immune response elicited by previous vaccines it is a polysaccharide vaccine that does not confer long-term protection ANSWER DOWNLOAD EXAMIANS APP
Microorganisms and Disease Mucus helps in protecting against pathogens by sequestering Iron blocking access and attachment of pathogens to mucosal surfaces facilitating the growth of normal flora lowering the pH sequestering Iron blocking access and attachment of pathogens to mucosal surfaces facilitating the growth of normal flora lowering the pH ANSWER DOWNLOAD EXAMIANS APP
Microorganisms and Disease Which is not a major defense mechanism in the stomach? Dense normal flora All of these Proteolytic enzymes Low pH Dense normal flora All of these Proteolytic enzymes Low pH ANSWER DOWNLOAD EXAMIANS APP
Microorganisms and Disease In the human disease cholera, what is it that actually ends up killing the victim? Dehydration and loss of nutrients the toxin produced by the bacterium Faulty carrier proteins Too little water in the food stream Dehydration and loss of nutrients the toxin produced by the bacterium Faulty carrier proteins Too little water in the food stream 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 activate T cells to proliferate and secrete cytokines survive the acid pH of the stomach survive within macrophages secrete LT (heat labile toxin) and ST (heat stable toxin) into the lumen of the intestine activate T cells to proliferate and secrete cytokines survive the acid pH of the stomach survive within macrophages secrete LT (heat labile toxin) and ST (heat stable toxin) into the lumen of the intestine ANSWER DOWNLOAD EXAMIANS APP
Microorganisms and Disease What is common in catheters and ventilators? They bypass important defenses of the body Bacteria responsible for associated infections are usually susceptible to antibiotics They are used primarily in neonatal intensive care units They predispose patients to viral rather than bacterial infections They bypass important defenses of the body Bacteria responsible for associated infections are usually susceptible to antibiotics They are used primarily in neonatal intensive care units They predispose patients to viral rather than bacterial infections ANSWER DOWNLOAD EXAMIANS APP
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