Introduction to Parasitology

Question 1

is a specialized branch of ecology

Answer 1

Parasitology

Question 2

is the study of organisms living within a specialized environment

Answer 2

Parasitology

Question 3

is usually not obligatory, but it reflects a relationship in which one species of organism benefits and the other neither benefits nor is harmed

Answer 3

Commensalism

Question 4

is a relationship in which one species of organism lives on or with another organism, with the parasite living at the expense of and often causing harm to the host

Answer 4

Parasitism

Question 5

The study of parasites and hosts interaction is called

Answer 5

Parasitology

Question 6

are living organisms that are associated with food for all or part of their life cycle.

Answer 6

Parasites

Question 7

are organisms providing food for parasites

Answer 7

Hosts

Question 8

Parasitology involves:

Answer 8

◼ Biology of parasites
◼ Variation of life cycles among parasites
◼ Methods of invasion
◼ Migration and maturation within the hosts
◼ Effect of parasites upon the hosts
◼ Host reactions and responses
◼ Methods of escape from the hosts
◼ Distribution of the parasites

Question 9

Types of Parasites:

Answer 9

• Endoparasite
• Ectoparasite
• Facultative parasite
• Accidental parasite

Question 10

lives inside the host

Answer 10

Endoparasite

Question 11

lives on or in the skin

Answer 11

Ectoparasite

Question 12

free-living organism that can become parasitic if it is accidentally ingested or enters a wound or other body opening.

Answer 12

Facultative parasite

Question 13

normally live in or on a host other than humans, and these parasites do not survive long in an unnatural human host

Answer 13

Accidental parasite

Question 14

Types of Host

Answer 14

• Definitive host
• Intermediate host
• Transport host
• Reservoir host

Question 15

one in which the parasite reaches sexual or reproductive maturity

Answer 15

Definitive host

Question 16

is one that harbors parasites that engage in asexual
reproduction

Answer 16

Intermediate host

Question 17

one that harbors a parasite that does not reproduce but merely goes on to infect a new host

Answer 17

Transport host

Question 18

may harbor a parasite that is also infective for humans

Answer 18

Reservoir host

Question 19

are microscopic one-celled organisms that are categorized according to their method of movements

Answer 19

Protozoans

Question 20

the only parasitic ciliate that causes disease in humans is

Answer 20

Balantidium coli

Question 21

three of the most common and medically significant Flagellates include:

Answer 21

Giardia lamblia, Trypanosome sp. and Trichomonas vaginalis

Question 22

Classification of Parasites

Answer 22

• Amoeba
• Metazoans
• Arthropods

Question 23

Amoeba –include the pathogenic amoeba ____________________________ which cause dysentery in humans

Answer 23

Entamoeba and Endolimax

Question 24

are multicellular worm-like invertebrates

Answer 24

Metazoans

Question 25

Helminths

Answer 25

◼ Cestodes (flatworms) ◼ Nematodes (roundworms) ◼ Trematodes (flukes)

Question 26

possess a hard exoskeleton and jointed appendages

Answer 26

Arthropods

Question 27

Host Parasites

Answer 27

Insects - mosquitoes, lice, and fleas Arachnids - ticks and mites

Question 28

Effects of Parasites to the Hosts

Answer 28

◼ Mechanical damage ◼ Migration through tissues ◼ Nutrition ◼ Toxins ◼ Immunosuppression ◼ Pathogenic

Question 29

hosts which the parasites survives and the host may suffer as a result of the presence of parasite

Answer 29

Susceptible hosts

Question 30

is resistant to the parasite

Answer 30

Non-susceptible hosts

Question 31

the accumulation o f numerous individuals of a particular species in one host.

Answer 31

Asexual phase

Question 32

the mature phase ofparasite’s life cycle

Answer 32

Sexual phase