(J) PARASITOLOGY

Question 1

How are deer flies identified?

Answer 1

Their gold or green eyes and dark bands across their wings

Question 2

Why are black flies sometimes called buffalo gnats?

Answer 2

Due to their humpback appearance

Question 3

An allergic reaction to the Culicoides species saliva can cause what problem in horses?

Answer 3

Sweet itch

Question 4

How does larvicide work?

Answer 4

It prevents the formation of the exoskeleton of fly larvae

Question 5

What are the two species of cattle grubs?

Answer 5

Hypoderma bovis and Hypoderma lineatum

Question 6

What are two common names for adult cattle grubs?

Answer 6

Heel flies and bomb flies

Question 7

What two types of ticks are the primary vectors for Rocky Mountain Spotted Fever?

Answer 7

The Rocky Mountain Wood Tick and the American Dog Tick

Question 8

Bites by the Rocky Mountain Wood Tick and the American Dog Tick can cause what issue that is an especially important concern for free range animals?

Answer 8

Tick-bite paralysis

Question 9

Besides Rocky Mountain Spotted Fever, what other disease are Rocky Mountain Wood Ticks known for?

Answer 9

Colorado Tick Fever (Mountain Tick Fever)

Question 10

The Eastern Blacklegged Tick and the Western Blacklegged Tick are known to transmit what two equine diseases?

Answer 10

Lyme Disease and Equine Granulocytic Ehrlichiosis

Question 11

The Lone Star Tick is considered a vector for which equine disease?

Answer 11

Equine Granulocytic Ehrlichiosis

Question 12

The Tropical Horse Tick is a known vector for which equine disease?

Answer 12

Equine Piroplasmosis

Question 13

What species of mite causes Chorioptic mange?

Answer 13

Chorioptes bovis

Question 14

What are the two most toxic species of blister beetles?

Answer 14

The striped blister beetle and the three-striped blister beetle

Question 15

Currently, what three internal parasites are considered to be the most important in regards to potential risk?

Answer 15

Small strongyles, ascarids, and tapeworms

Question 16

Which of the main strongyle species is commonly referred to as the bloodworm?

Answer 16

Strongylus vulgaris

Question 17

Ascarid parasites primarily live in what area of the small intestine?

Answer 17

The duodenum and jejunum

Question 18

How many species of small strongyles are there?

Answer 18

50

Question 19

Temperatures greater than what will kill small strongyles larvae?

Answer 19

100 degrees Fahrenheit or higher

Question 20

Small strongyles eggs will not hatch at temperatures lower that what?

Answer 20

40 degrees Fahrenheit

Question 21

What percentage of horses on any given property can harbor tapeworms?

Answer 21

20% to 80%

Question 22

What are two names for the mite that is the intermediate host for the taperworm?

Answer 22

Oribatid mite of forage mite

Question 23

What are three species of stomach worms?

Answer 23

Habronema muscae, Habronema microstoma, and Draschia megastoma

Question 24

Infection with lungworms can result in what two problems in horses?

Answer 24

Parasitic pnueumonia and bronchitis

Question 25

Clinical signs of lungworms infection are similar to clinical signs for which disorder?

Answer 25

Recurrent Airway Obstruction (Heaves)

Question 26

What is the scientific name for the hairworm?

Answer 26

Trichostrongylus axei

Question 27

At 45-50 degrees Fahrenheit, how many days will it take stongyle eggs to hatch?

Answer 27

12-14

Question 28

At 70-85 degrees Fahrenheit, how many days will it take stongyle eggs to hatch?

Answer 28

1 to 2

Question 29

At 85-100 degrees Fahrenheit, how many days will it take stongyle eggs to hatch?

Answer 29

1

Question 30

What percentage of the horse population carries what percentage of the worms?

Answer 30

20%of the horse population carries 80% of the worms

Question 31

Name two dewormers that are effective against Tapeworms?

Answer 31

Pyrantel and Praziquantel

Question 32

Fecal egg count thresholds of how many eggs per gram are recommend?

Answer 32

100 to 500 eggs per gram

Question 33

Threadworms can be detected in foal manure by what age?

Answer 33

12 days of age

Question 34

An overdose of moxidectin is how many times the labeled dose?

Answer 34

3

Question 35

An overdose of ivermectin is how many times the labeled dose?

Answer 35

10

Question 36

Moxidectin is to be used in horses over what age?

Answer 36

Six months

Question 37

The time between deworming and seeing eggs in the manure again is called what?

Answer 37

The egg reappearance period

Question 38

Culicoides biting midges can spread which other parasite to the horse?

Answer 38

Onchocerca cervicalis

Question 39

Onchocerca cervicalis migrate to, and then take up residence, in what areas of the body?

Answer 39

The nuchal ligament and the ventral midline

Question 40

Onchocerca cervicalisare also known as what?

Answer 40

Neck Threadworms

Question 41

What can Onchocerca cervicalis cause in the horse?

Answer 41

The adult worms can form bumps in the skin that cause intense itching

Question 42

What is it called when the inner corner of the eye is affected by Habronema worms?

Answer 42

Ocular Habronemiasis

Question 43

At 50-70 degrees Fahrenheit, how many days will it take strongyle eggs to hatch?

Answer 43

2-7

Question 44

What dewormer is effective only against Tapeworms?

Answer 44

Praziquantel