Intro Flashcards

1
Q

define parasitology

A

Area of biology concerned with the dependence of one organism on another (host and parasite)
- animals, humans, plants

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2
Q

clinical or medical parasitology definition

A

Branch of parasitology dealing with animal parasites of humans

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3
Q

definitive hosts

A

adult, sexual multiplication

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4
Q

intermediate host

A

larval stage, asexual multiplication

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5
Q

what is a vector?

A

invertebrate organism that spreads infection by transporting parasite pathogens from one host to another

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6
Q

two types of vectors

A
  • mechanical: transports a parasite from one host to another without any changes
  • biological: transports from one host to another, and also supports the parasite’s life cycle or multiplictation
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7
Q

endoparasites

A

lives inside hosts

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8
Q

ectoparasites

A

lives on surface of the body of the host

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9
Q

biologic incubation period

A
  • aka prepatent period
  • period bw parasitic entry into host and its appearance in host tissues/fluids (blood, feces, etc.)
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10
Q

clinical incubation period

A

period between parasite entry into host and occurrence of symptoms

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11
Q

protozoan

A
  • multiplies within host
  • can be intracellular (Leishmania or malaria) OR extracellular (intestinal protozoa)
  • continuous antigenic stimulation as infection progresses
  • positive correlation bw clinical symptoms and serological or immune manifestation
  • acquisition of immunity critical to host survival
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12
Q

metazoan

A
  • do not multiply within host
  • extracellular existence
  • little or no effect on host response (helminths)
  • majority of infections are light, asymptomatic in nonimmune host (pinworm, ascaris, etc.)
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13
Q
A
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