Chlorination of water supplies represents an epidemiological technique directed
at
~ eliminating sources of infection.
Phagocytosis leads to destruction of engulfed pathogens by which of the
following mechanisms?
~ Lysosomal-mediated hydrolysis
A disease will be ____________ likely to c...
The site or natural environmental location in which the causative organism is
normally found is called the _________.
✓~ reservoir
___________ immunity is an epidemiological concept that explains the
resistance of a population to infection and the spread of an infectious organism
due to the immunity of a high percentage of the population.
✓~ Herd
Substances that are recognized as foreign and provoke immune responses are
called _________.
✓~ antigens
tf Microorganisms do not generally reproduce sexually; therefore, species are
usually defined by phenotypic and genotypic similarities.
, ✓~ true
Lysozyme is an enzyme that lyses _________.
✓~ bacteria
tf Generally, exotoxins tend to be more heat stable than endotoxins.
✓~ false
A __________ epidemic is characterized by a relatively slow and prolonged
rise then a gradual decline in the number of individuals infected.
✓~ propagated
tf The oral cavity of humans normally becomes colonized with microorganisms
within hours after birth.
✓~ true
, The analysis of genetic relatedness by observing the DNA fragmentation
patterns resulting from restriction endonuclease cleavage is referred to as
______.
✓~ genetic fingerprinting
Microbiota of the skin are most likely to be found
✓~ in association with oil and sweat glands.
tf Microbial species are collections of strains that share many stable properties
in common but differ significantly from other strains.
✓~ true
tf The lower genitourinary tract is usually free of microorganisms.
✓~ false
The sudden, unexpected occurrence of a disease in a limited segment of a
population is called a(n) _________.
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