Intro

Question 1

define parasitology

Answer 1

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

Question 2

clinical or medical parasitology definition

Answer 2

Branch of parasitology dealing with animal parasites of humans

Question 3

definitive hosts

Answer 3

adult, sexual multiplication

Question 4

intermediate host

Answer 4

larval stage, asexual multiplication

Question 5

what is a vector?

Answer 5

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

Question 6

two types of vectors

Answer 6

• 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

Question 7

endoparasites

Answer 7

lives inside hosts

Question 8

ectoparasites

Answer 8

lives on surface of the body of the host

Question 9

biologic incubation period

Answer 9

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

Question 10

clinical incubation period

Answer 10

period between parasite entry into host and occurrence of symptoms

Question 11

protozoan

Answer 11

• 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

Question 12

metazoan

Answer 12

• 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.)