Parasitology Exam 1 Cl

Front 1

A group of flatworms that is nonparasitic is:

Back 1

Turbellaria

Front 2

The finding of first stage larvae in the feces of dogs.....indicates a diagnosis of:

Back 2

Ancylostoma caninum

Front 3

Puppies with ascarid eggs in their feces 3 weeks after birth are most likely infected with which parasite?

Back 3

Toxocara canis

Front 4

Puppies that die with severe anemia in the second week of life has most likely suffered from:

Back 4

Peracute hookworm infection

Front 5

Cats infected with Ancylostoma tubaeforme may exhibit what signs?

Back 5

Pale mucous membrane

Front 6

A group of flatworms that is nonparasitic is:

Back 6

Turbellaria

Front 7

The finding of first stage larvae in the feces of dogs.....indicates a diagnosis of:

Back 7

Ancylostoma caninum

Front 8

Puppies with ascarid eggs in their feces 3 weeks after birth are most likely infected with which parasite?

Back 8

Toxocara canis

Front 9

Puppies that die with severe anemia in the second week of life has most likely suffered from:

Back 9

Peracute hookworm infection

Front 10

Cats infected with Ancylostoma tubaeforme may exhibit what signs?

Back 10

Pale mucous membrane

Front 11

What species is associated with eosinophilic enteritis?

Back 11

Ancylostoma caninum

Front 12

The most common way in which Ancylostoma caninum is transmitted to young puppies is:

Back 12

Transmammary

Front 13

Large ascarid like nematode larvae recovered from the brain of animals showing neurological signs are most likely:

Back 13

Baylisascaris

Front 14

Fresh Trichuris eggs are:

Back 14

Double plugged

Front 15

A cat passing 5 cm length nematodes in the feces may be infected with:

Back 15

Toxacara

Front 16

Severe strongyloides infection in dogs may result in clinical signs of:

Back 16

Soft cough and diarrhea

Front 17

A drug that successfully treats Strongyloides in 5 consecutive days:

Back 17

Fenbendazole

Front 18

Fresh blood in feces of a dog exhibiting tenesmus may be due to:

Back 18

Trichuris vulpis

Front 19

A Midwestern dog was diagnosed with intestinal tapeworms with bothriated scolex. The dog is known to eat raw fish. The tapeworm may be classified as which group?

Back 19

Cotyloda

Front 20

The time required for Toxascaris eggs to become infective is:

Back 20

1 week

Front 21

Control of Toxacara canis in the environment is difficult because:

Back 21

The shell of the egg is very thick & not easily penetrated by chemicals

Front 22

Dogs become infected with the tapeworm Dipylidium caninum by ingesting:

Back 22

Fleas

Front 23

A larva in fresh feces of 1 hour duration from a dog is:

Back 23

Stongyloides stercoralis

Front 24

The prevalence of this parasite eggs is greater than 60% in the feces of adult outdoor dogs. The parasite is:

Back 24

Ancylostoma caninum

Front 25

A parasite with 3 lips, a thick stoma & 5 inches long was removed from the intestine of a wolf. The parasite is:

Back 25

Toxacara canis

Front 26

What parasites contain a coelomic cavity?

Back 26

Helminths of the group nematoda

Front 27

The eggs of Ancylostoma are:

Back 27

Multicellular with a thin shell

Front 28

What is known as the arrowhead worm?

Back 28

Toxacara cati

Front 29

What are roundworms?

Back 29

Ascarids are commonly called roundworms, but all nematodes are round bodied worms.

Front 30

Dogs become infected with Trichuris vulpis when they ingest what stage larvae on the ground?

Back 30

L1

Front 31

How is Ancylostoma braziliense transmitted?

Back 31

Ingestion or percutaneous

Front 32

How might Strongyloides stercoralis be diagnosed?

Back 32

By finding L3 filariform and rhabditiform larvae in culture

Front 33

What is the characteristic feature of Trichuris vulpis?

Back 33

Stichosome esophagus

Front 34

Toxascaris leonine produces eggs that are:

Back 34

Smooth shell and inside is wavy and lighter colored

Front 35

Toxacara canis produces eggs that are:

Back 35

Rough shell on outside, and inner portion is dark

Front 36

What is the most pathogenic hookworm in mountain lions?

Back 36

Ancylostoma tubaeformae

Front 37

Puppies should be checked for Trichuris infection at what age?

Back 37

3 months

Front 38

Cats generally do not shed eggs of what parasite in the USA?

Back 38

Trichuris vulpis

Front 39

What anthelmintic is specific for treating ascarids?

Back 39

Pipenazine

Front 40

A host that harbors the developing sexually immature stage of a parasite is:

Back 40

Definitive host

Front 41

A rhabditiform esophagus morphologically consists of:

Back 41

A carpus, isthmus, and bulb

Front 42

Give the prepatent period for Ancylostoma caninum:

Back 42

2-4 weeks

Front 43

Give the prepatent period for Toxacara canis:

Back 43

3 weeks

Front 44

Give the prepatent period for Toxacara cati:

Back 44

8 weeks

Front 45

Give the prepatent period for Toxascaris leonine:

Back 45

9-10 weeks

Front 46

Give the prepatent period for Trichuris vulpis:

Back 46

11-13 wks

Front 47

Give the prepatent period for Strongyloides stercoralis:

Back 47

1 wk (F); 2 days (R)

Front 48

Give the infective stage of Toxacara canis:

Back 48

L3

Front 49

Give the infective stage of Ancylostoma caninum:

Back 49

L3

Front 50

Give the infective stage of Strongyloides stercoralis:

Back 50

L3

Front 51

Give the infective stage of Trichuris vulpis:

Back 51

L1

Front 52

Give the infective stage of Uncinaria stenocephala:

Back 52

L3

Front 53

Define viviparous nematode:

Back 53

Produce live eggs

Front 54

Define ancylostomiosis:

Back 54

Clinical signs if disease with hookworms

Front 55

Define creeping eruptions (Cutaneous Larval Migrans):

Back 55

L3 larva penetrate the skin and move up to 3 inches per day, leave red raised area that is puritic.

Front 56

Define prepatent period:

Back 56

Time period from infective stage to producing eggs in the fecal material of host

Front 57

Define zoonosis:

Back 57

Transfer from animal to human

Front 58

Define intermediate host:

Back 58

Host that harbors the immature developing larva

Front 59

Define paratenic host:

Back 59

Transport host, no sexual maturity

Front 60

Define parthenogenic nematode:

Back 60

Produce eggs without physical presence of male

Front 61

Define helminths

Back 61

Parasitic worms

Front 62

Define acanthocephalans

Back 62

Thorny-headed worms

Front 63

Describe in detail the lifecycle of Strongyloides stercoralis:

Back 63

Strongyloides are unique among parasites of domestic animals in having alternate free-living and parasitic generations; only females are parasitic; these females are parthenogenic (3N) and have filariform esophagus; The eggs hatch before they are passed with feces (another unique characteristic); these L1 may develop into infective filariform L3 after 2 molts of free-living males, and females after 4 molds - if not filariform, develop into rhabditiform on ground outside.

Front 64

What phylum of helminths contain a spiny proboscis?

Back 64

Acanthocephalan

Front 65

Dignetic trematodes may be diagnosed by finding:

Back 65

A single operculated egg in feces

Front 66

How do dogs become infected with digenetic flukes?

Back 66

When they ingest metacercaria larvae

Front 67

What is a characteristic of toxocara?

Back 67

Three lips

Front 68

Puppies may be checked for Toxocara eggs in the feces at what age?

Back 68

One month of age

Front 69

At what temperature will Ancylostoma eggs develop?

Back 69

77 F

Front 70

Which tapeworms do not shed proglottids in feces?

Back 70

False tapeworms

Front 71

What antihelmintic is effective for treating ascarids?

Back 71

Fenbendazole

Front 72

A host that harbors the developing sexually immature stage of a parasite is:

Back 72

Intermediate host

Front 73

The three Metacestode stages of Pseudophyllideans are:

Back 73

Coracidium, Procercoid, and Pleurocercoid

Front 74

List the infective or metacestode stages of the Eucestoda Tapeworms:

Back 74

Simple cysticercus, Coenurus, Strobilicercus, Multilocular Hydatid, Unilocular Hydatid, Cysicercus

Front 75

Large bothriated worms removed from the feces of cats showing abdominal discomfort are most likely:

Back 75

False Tapeworm

Front 76

Fresh Diphyliobothrium eggs are:

Back 76

Single operculum

Front 77

A cat passing unicellular, round, thick shell eggs may be infected with:

Back 77

Toxacara

Front 78

Severe Toxocara infection in dogs may result in clinical signs of:

Back 78

Pot Belly

Front 79

The drug Nemex that successfully treats hookworms and ascarids is:

Back 79

Pyrantel pamoate

Front 80

Dark blood in the feces of the dog may most likely be due to:

Back 80

Ancylostoma caninum

Front 81

The time required for Toxascaris eggs to become infective is:

Back 81

1 wk

Front 82

Dogs become infected with the tapeworm Diphylidium caninum by ingesting fleas containing:

Back 82

Cysticercoid

Front 83

A pathogenic monogenean in the gills of fish is:

Back 83

Gyrodactylus

Front 84

List the infective or metacestode stages of the Eucestoda Tapeworms:

Back 84

Simple cysticercus, Coenurus, Strobilicercus, Multilocular Hydatid, Unilocular Hydatid, Cysicercus

Front 85

Large bothriated worms removed from the feces of cats showing abdominal discomfort are most likely:

Back 85

False Tapeworm

Front 86

Fresh Diphyliobothrium eggs are:

Back 86

Single operculum

Front 87

A cat passing unicellular, round, thick shell eggs may be infected with:

Back 87

Toxacara

Front 88

Severe Toxocara infection in dogs may result in clinical signs of:

Back 88

Pot Belly

Front 89

The drug Nemex that successfully treats hookworms and ascarids is:

Back 89

Pyrantel pamoate

Front 90

Dark blood in the feces of the dog may most likely be due to:

Back 90

Ancylostoma caninum

Front 91

The time required for Toxascaris eggs to become infective is:

Back 91

1 wk

Front 92

Dogs become infected with the tapeworm Diphylidium caninum by ingesting fleas containing:

Back 92

Cysticercoid

Front 93

A pathogenic monogenean in the gills of fish is:

Back 93

Gyrodactylus

Front 94

The prevalence of this parasites eggs is greater than 60% in the feces of adult outdoor dogs. This parasite is:

Back 94

Ancylostoma caninum

Front 95

What is a parasite?

Back 95

An organism that lives off of and obtains nutrition from another organism, usually harms the host.

Front 96

Define secondary Ancylostomiosis

Back 96

A hookworm infection that occurs after another infection, disease, or period when an animals health is compromised.

Front 97

Define Creeping Eruption (Cutaneous Larval Migrans).

Back 97

A process that occurs in a human where a parasite penetrates the skin and migrates to the site of action

Front 98

Define prepatent period.

Back 98

The time when an organism becomes infected with a parasite to the time the organism sheds eggs.

Front 99

Define zoonosis.

Back 99

A disease or infection in which an animal transmits the disease to human

Front 100

Define intermediate host.

Back 100

A host that harbors an immature stage of a parasite.

Front 101

Define paratenic host:

Back 101

A host in which a parasite may grow or multiply but the growth or development is not required by the parasite to complete its lifecycle.

Front 102

Define definitive host:

Back 102

The final host which harbors the sexually mature stage of a parasite.

Front 103

Define helminths:

Back 103

Worms; organism that is multicellular and has multiple organ systems, can be a parasite

Front 104

Define Acanthocephalans:

Back 104

Thorny headed worms that have a spiny proboscis.

Front 105

Describe in detail the lifecycle of Ancylostoma caninum.

Back 105

L3 infective larvae can penetrate skin or be ingested. If penetrates skin, goes through blood stream to heart then lungs; breaks out the lungs through the alveoli, bronchioles, through trachea. Dog coughs then swallows worm; it goes through esophagus, stomach, into the small intestines. There the larvae burrow into the crypts of the mucosa. They molt into an L4 and then L5. They lay eggs which come out in feces. The