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47 Cards in this Set

  • Front
  • Back
the ability to provide nutritional and physical growth support for another is

a) Host
b) Mutualism
c) Commensalism
d) Opportunistic
Host
colonizing bacteria that does not harm the host

the ability to provide nutritional and physical growth support for another is

a) Host
b) Mutualism
c) Commensalism
d) Opportunistic
commensalism
causes disease when there is underlying impaired immunity

a) Infection
b) Infectious disease
c) Commensalism
d) Opportunistic
opportunistic pathogen
the presence of intestinal bacteria allows the production of vit k is an example of what kind of relationship?
mutualism
disease producing potential

a) Infection
b) Infectious disease
c) Virulence
d) Pathogen
Virulence
____ always causes disease
pathogen
when the host sustains injury in response to a parasitic infection

a) Pathogen
b) Infectious disease
c) Parasitic Relationship
d) Opportunistic
Infectious disease
the presence and multiplication of a living organism on or within a host
infection
free living organism

a) pathogen
b) sporophyte
c) host
d) none
sporophyte
T/F

viruses are a specific cell type
F

Virus= obligate intracellular parasite - not a cell - cannot replicate on its own
list the components of a virus
protein coat surrounding nucleic acid (RNA or DNA)
describe the relationship that a virus has on the host
uses host for replication then causes lysis
either causes death of host
or transforms host cell into malignant cell- controls hosts DNA system
what is true about bacteria

a) prokaryotic
b) unicellular
c) sterol membrane
d) all are true
prokaryote
unicellular

(3 layer sterol membrane = mycoplasm)
incorrect statement about bacteria

a) asexual or simple cell division
b) single DNA
c) single RNA
d) all are true
all are true
bacteria can use which of the following for energy production

a) anaerobic
b) aerobic
c) facultative anaerobic
d) all
all
the smallest self replicating prokaryote

a) virus
b) bacteria
c) mycoplsma
d) Rickettsiae
mycoplasma
obligate intracellular bacteria that is incapable of self replication

a) Chlamydia
b) Mycoplasma
c) Bacteria
d) Rickettsiae
Rickettsiae
This form of bacteria has a complex growth cycle that has intra and extracellular stages

obligate intracellular bacteria that is incapable of self replication

a) Chlamydia
b) Mycoplasma
c) Bacteria
d) Rickettsiae
chlamydia
depends on a host cell for ATP production

a) Rickettsiae
b) Chlamydia
c) a, b
d) none
rickettsiae
chlamydia
eukaryotic cell

a) parasite
b) fungi
c) mycolasma
d) all
fungi-
composed if yeast, mold, dimorphic
sexual or asexual

Parasite- protozoa
list the types of parasite
protozoa
helminth
arthropod
wormlike parasite

a) Protozoa
b) Helminth
c) Arthropod
Helminth
vectors of infectious disease and ectoparasite

a) protozoa
b) Helminth
c) arthropod
d) virus
arthropod
the process of a mosquito spreading malaria is an example of

a) protozoa
b) Helminth
c) arthropod
d) virus
arthropod
this parasite requires hosts for complex maturation and reproduction cycle

a) protozoa
b) Helminth
c) arthropod
protozoa
list the the portals of infection entry
penetration
direct contact
ingestion
inhalation
T/F

the number of infectious agents absorbed does not affect the ultimate transmissions of the disease
F
number of agents directly affects the transmission
transmission of pathogens via exposure to intact mucus membranes

a) penetration
b) direct contact
c) ingestion
d) none
direct contact
I patient with severe bacterial infection in the lungs, enters the hospital because the infection has since spread to the KD.

is the infection endogenous or exogenous in its source
endogenous
where nosocomial infection contracted
hospital
T/F

symptoms first appear during the incubation period
F
NO symptoms- this is period of replication
at what stage do clinical symptoms first appear

a) incubation
b) prodromal
c) acute
d) convalescent
prodromal
When are clinical symptoms the most pronounced

a) incubation
b) prodromal
c) acute
d) convalescent
acute
a patient exhibits no clinical symptoms of a pathogen during which stage

a) incubation
b) prodromal
c) resolution
d) all
incubation
resolution
pathogens that travel via blood to site of infection is _____
systemic infection
list virulence factors
toxins (endo/exo)
adhesion
evasive
invasive
T/F

and exotoxin is a lipid molecule in the cell wall of gram (-) bacteria
F

endotoxin

exotoxin= protein released by pathogens during growth
____inactivates/modifies key cellular constituents causing cell death or dysfunction

a) exotoxin
b) endotoxin
c) Invasive factor
d) Adhesion factor
exotoxin- protein release by pathogen during frowth

endo-lipid in cell wall of gram- bacteria
invasive- enzymes secreted by pathogen to penetrate host tissue
adhesion- bacteria binds to host embeds in gelatinous layer to protect bacteria
t/f

endotoxins are more life threatening than exotoxins
T - causes endotoxic shock
adhesion factors attach to host cell receptor via

a) ligand
b) gelatinous layer
c) pili/fimbrae
d) all
ligand
pili

(gelatinous layer anchors and protects pathogen)
what is not related to evasive factors

a) capsule
b) avoid host immune cells
c) enzyme secretion
d) replicate in WBCs
enzyme secretion - by pathogens occurs in invasive factors to penetrate host tissues/anatomic barriers
list diagnosis methods
culture
serology
antigen detection
genomic sequence
for which cases are cell cultures used

a) virus
b) chlamydia
c) rickettsiae
d) all
all
cultures are useful for determining all the following except

a) characteristics of colonies
b) phase of infection
c) microscopic appearance
d) Gram stain
phase of infection = serology
serology is useful for determining what about a pathogen
phase of infection
congenital infection

(look for anti-bodies against a virus)
T/F

Serology is a direct method to identify a pathogen
F- indirect

measures serum antibody specific to an agent
PCR is used for which diagnostic method?

a) culture
b) serology
c) antigen detection
d) genomic sequence
genomic sequence