Introduction

Question 1

Parasitism

Answer 1

Living on or within another

• parasite depends on host resources
• detrimental to host

Question 2

What is the difference between commensalism and mutualism?

Answer 2

Commensalism: no harm or benefit to host
Mutualism: host is benefited from the parasite

Question 3

Aberrant parasite

Answer 3

Wanders from usual site of infection, usually causing pathology

• often in host other than “normal host”
• may be an accidental parasite

Question 4

Facultative parasite

Answer 4

Free living, can live apart from host

Question 5

Obligate parasite

Answer 5

Depends on host for survival, cannot multiply outside of host

Question 6

Ectoparasites cause _______, endoparasites cause ________

Answer 6

Infestation; infection

Question 7

Direct life cycle vs indirect life cycle

Answer 7

Direct: goes from environment (larval stages) to definitive host (sexual maturation, lay eggs)
Indirect: environment to intermediate host to definitive host

Question 8

Definitive host

Answer 8

Host where sexually mature parasite stages occur

• reproduction –> offspring
• is required for parasite life cycles that are BOTH direct, or indirect!

Question 9

Intermediate host

Answer 9

Host in which immature parasite stages develop further

- required for indirect life cycles

Question 10

Paratenic host

Answer 10

Harbors immature stages, but NO development in host

• not required in life cycle
• “transport host”

Question 11

Reservoir host

Answer 11

Serves as source of infection for domestic animals

- usually wildlife species

Question 12

Parasites with a wide host range are generally not _________

Answer 12

Host specific

Question 13

Prepatent period

Answer 13

Time from initial infection to first detection of diagnostic stages

Question 14

Patent period

Answer 14

Period of time during which diagnostic stages can be detected

Question 15

Autoinfection

Answer 15

Re-infection of host by parasite offspring without the parasites leaving the host

Question 16

Horizontal transmission vs vertical transmission

Answer 16

Horizontal: among group members
Vertical: to next generation

Question 17

Zoonosis

Answer 17

Transmissible from animals to humans

Question 18

Scientific names for parasites are a ______

Answer 18

Binomial

• genus is capitalized, species is lowercase
• both are italicized or underlined