Virulence and pathogenicity of Parasites

Question 1

Parasite

Answer 1

Smaller organism that lives on or in and at the expense of a larger organisms called HOST

Question 2

Ancyclostoma Caninum (Hookworm) (3)

Answer 2

Suck blood
Causes pale mouth
Transmammary transmission is most common way of getting it

Question 3

What are the main classes that can cause disease in humans (3)

Answer 3

Helminths
Protozoa
Ectoparasites

Question 4

Phylum Nemathelmithes are also known as

Answer 4

Roundworm

Question 5

Phylum Platyhelminthes is also known as

Answer 5

Flatworms

Question 6

Classes of Platyhelmintes

Answer 6

Cestoda (Tapeworm)

Trematodes (Flukes)

Question 7

Classes of Arthropod (2)

Answer 7

Insecta

Arachnida

Question 8

Nematode characteristic (5)

Answer 8

Free living parasite
Elongate Cylindrical Shape
Alimentary Canal present
Separate Sexes
Direct life Cycle

Question 9

Cestodes Characteristics (5)

Answer 9

Flat body
No alimentary canal
Scolex for attachment
Strobila with proglottids (Each hermaphroditic)
Indirect Life cycle

Question 10

Trematode characteristics (5)

Answer 10

Dorso ventrally flattened
Leaf like
Oral and ventral sucker
Indirect Life Cycle
Genitally Independent

Question 11

Arthropods are

Answer 11

Insects or arachnids

Question 12

Insects characteristics (3)

Answer 12

Adults have 3 pairs of legs
Head, thorax, abdomen
Antenna

Question 13

Arachnids Characteristics (4)

Answer 13

Adults have 4 pairs of legs
Larvae only 3
Cephalo-thorax and abdomen
No antennae but palps

Question 14

Ectoparasite (2)

Answer 14

Lives on host

Causes INFESTATIONS

Question 15

Endoparasite (2)

Answer 15

Live in host

causes INFECTIONS

Question 16

Definite host

Answer 16

Harbors adults or sexual stage of parasite

Question 17

Intermediate host

Answer 17

Harbors larval or asexual stage of parasite

Question 18

Incidental host

Answer 18

Unusual host, unnecessary for the maintenance of parasite in nature

Question 19

What parasites use the ingestion mode of infection (6)

Answer 19

Giardia
Balantidium Coli
Toxoplasma gondii
Crysptosporidium
Cestodes
some nematodes and some trematodes

Question 20

Parasites that use the skin as mode of infection (3)

Answer 20

Hookworm
Strongyloides Stercoralic
Schistosomes

Question 21

Parasites that infect transplacentarly (3)

Answer 21

Toxoplasma gondii
Toxocara canis
Strongyloides Stercolis

Question 22

Parasites transmitted transmammarly (3)

Answer 22

Toxocara canis
T. Cani
Ancyclostoma caninum

Question 23

Parasites transmitted by arthrophode bite (3)

Answer 23

Babesia
Heartworm
Leishmania Trypanosome

Question 24

T or F

Helminths adults multiply and reproduce in host

Answer 24

FALSE

Question 25

Parasites that create a blockage of internal organs

Answer 25

Ascaris
Tapeworm
Shistosome
Filarial worm

Question 26

Toxocariasis is

Answer 26

Inflammation causes pathology during worm migration

Question 27

Parasites that leave destructive enzymes include (3)

Answer 27

Anasakiasis
Shicstosome Cercaridae
Hookworm

Question 28

Parasites that leave endotoxins

Answer 28

African Trypanosome and malaria

Question 29

Parasites that have toxic secretion

Answer 29

Tick paralysis

Question 30

Parasites that compete for hosts nutrients

Answer 30

Diphylobothrium tatum (fish tapeworm)

Question 31

Parasites that interfere with absoprtion of nutrients

Answer 31

Giardia dudenalis and Strongyloides stercoralis