FINAL EXAM: Micro 260 LCC Comprehensive Questions with 100% CORRECT Answers, Structure of DNA, sides of the ladder are composed of,Function of DNA, Structure of RNA, Function of RNA, RNA and DNA type of molecule, DNA sugar deoxyribose RNA sugar ribose location of DNA Nucleus location of RNA Nucleus...
Final exam, micro 260, LCC
"flesh-eating" bacteria- etiologic agent of necrotizing faciitis - beta hemolytic Gr A strep (strep
pyogenes)
2 enzymes that help a pathogen spread in tissue - kinase, hyalurinidase, collagenase, neuraminidase
2 mechanisms whereby bacteria can be resistant to antibiotics - enzyme that inactivates antibiotic,
alteration of antibiotic binding site, metabolic bypass of inhibited reactions, reduce uptake, efflux
pumps remove abx
2 virulence factors for beta hemolytic Gr A strep (strep pyogenes) - Hemolysins,
hyaluronidase
streptokinase,
M protein,
capsule
a "pseudomembrane" in the throat is a classic sign of infection with this organism - Corynebacterium
ditheriae
A microbe-host association in which the microbe benefits but the host is unaffected is - commensal
a type of vaccine that contains live organisms - Attenuated vaccine
adaptive immunity - -specific recognition of pathogen
-memory
Advantage and disadvantage of attenuated vaccines - advantage- most effective at inducing life long
immunity
disadvantage- can cause disease in immunocompromised patients, or can revert to virulent form
Advantage and disadvantage of inactivated vaccines. - advantage- safe, cannot cause disease.
disadvantage- weaker immune response, requires boosters
agglutination - they clump particles together so phagocytosis can occur more efficiently
airborne - carried by dust or droplets suspending in the air
An acid- fast organism with a waxy cell wall that enables it to survive inside phagoctes. Still a leading
infectious disease worldwide - Mycobacterium tuberculosis
An example of a fomite would be - a contaminated bedpan
a drinking glass used by patient
bandages from an infected wound cutting board.
, An example of naturally acquired active immunity - actually having had the disease
An example of vehicle transmission - Waterborne, foodborne, or airborne
an inactivated toxin used in vaccines - toxoid
An inanimate object involved in indirect transmission of an infectious agent - fomite
An infection acquired during the course of hospitalization - Nosocomial infection
Antibiotics are not effective after the onset of this stage of whooping cough - stage 3- paroxysmal
stage
Antibodies are secreted by? - plasma cells
antibody - specific immunoglobulin a protein molecule produced in response to antigens
Antibody mediated cytotoxicity - The Fc region of the antibody interacts with eosinophils which
release enzymes and reactive oxygen species to attack parasites
antibody-mediated (humoral) immunity - the aspect of immunity that is mediated by
macromolecules found in extracellular fluids such as secreted antibodies, complement proteins, and
certain antimicrobial peptides.
antigen - a molecule that stimulates an adaptive immune response
are exotoxins found in the cell wall of gram-negative bacteria? - no false
artificial active immunity - Artificially acquired active immunity can be induced by a vaccine, a
substance that contains antigen. A vaccine stimulates a primary response against the antigen without
causing symptoms of the disease
Artificial passive immunity would result from? - receiving a gamma globulin shot
Associated with miscarriages, stillbirths, sepsis, and meningitis from contaminated dairy products -
Listeria monocytogenes
Autoimmune response following strep throat - Rheumatic fever
B cells - arise from hematopoietic stem cell
b cells mature in the bone marrow responsible for production of glycoproteins called antibodies
B cells - develop in fetal development all receptors unique
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