Arthropod 3

Question 1

The stable fly:

What is the genus and species?

Answer 1

Stomoxys calcitrans

Question 2

What is a distinguishing feature of Stomoxys calcitrans?

Answer 2

4 longitudinal dark stripes on the thorax and 3-4 dark spots on the abdomen

Question 3

Which fly has BOTH sexes feeding on blood?

Answer 3

Stomoxys calcitrans (the stable fly)

Question 4

Where on the body does Stomoxys calcitrans bite?

Answer 4

On the belly & legs

Question 5

Is the stable fly a strong or weak flyer?

Answer 5

Strong

Question 6

Stable flies will lay eggs and larva will feed in moist, decaying vegetable debris including manure. Does their life cycle require manure?

Answer 6

NO

Question 7

1. For what are Stomoxys calcitrans mechanical vectors for?
2. For what are Stomoxys calcitrans biological vectors for?

Answer 7

1. Mechanical vector : Trypanosomes
2. Biological vectors : Habronema microstoma

Question 8

The horn fly:

What is the genus and species?

Answer 8

Haematobia irritans

Question 9

Is the horn fly a strong or weak flyer?

Answer 9

Weak

Question 10

Haematobia irritans will congregate on the back, withers, and around the head at what hours?

Answer 10

Day AND night

Question 11

Is Haematobia irritans dependent on fresh cow manure?

Answer 11

Yes

Question 12

Haematobia irritans overwinter as what?

Answer 12

Pupae

Question 13

200 flies per animal is considered the economic threshold for which fly species?

Answer 13

Haematobia irritans (the horn fly)

Question 14

Haematobia irritans:

Greater than ___ flies/animal can decrease weight gain 40-90 grams/day.

Answer 14

700

Question 15

1. For what is Haematobia irritans a vector?
2. Is it biological or mechanical?

Answer 15

1. Stephenofilaria
2. Biological vector

Question 16

Where can the Tse-Tse fly be found geographically?

Answer 16

Africa ONLY

Question 17

What is special about the gestation and parturition of the tse-tse fly?

Answer 17

The female tse-tse fly bears only one larva at a time. When extruded from the female, the fully developed 3rd stage larva almost immediately borrows into the soil and pupates.

Question 18

The sheep ked:

What is the genus and species?

Answer 18

Melophagus ovinus

Question 19

Which two flies retain their larvae in their abdomens until they are ready to pupate?

Answer 19

Tse-tse fly (Glossina spp.)

Sheep ked (Hippoboscids)

Question 20

What the genus and species associated with the “pupal case”?

Answer 20

Melophagus ovinus

“The sheep ked”

Question 21

What is the genus and species of the insect that spends its entire life cycle on its host?

Answer 21

Melophagus ovinus

“The sheep ked”

Question 22

For what is Melophagus ovinus a vector?

Answer 22

Trypanosoma malophagium

Question 23

True or False:

1. Melophagus ovinus is adequately controlled by most insecticides.
2. For Melophagus ovinus, the larva are unaffected by most treatment.

Answer 23

1. TRUE
2. FALSE - pupae are unaffected by most treatments

Question 24

Because the pupae of Melophagus ovinus are unaffected by most treatments, how must you treat to be successful?

Answer 24

Treat twice with 1 month between treatments

Best to treat after shearing

Question 25

The invasion of tissue or organs of host animals by larval flies usually known as maggots or grubs.

Answer 25

Myiasis

Question 26

Which flies undergo cutaneous myiasis?

Answer 26

Screwworms Blowflies Flesh flies Skin bots

Question 27

Which flies undergo internal myiasis?

Answer 27

Nose bots Stomach bots Cattle grubs

Question 28

Where do blowflies lay there eggs?

Answer 28

Wounded, infected, or soiled skin of mammals

Question 29

Blowflies: What are their females, oviparous, oviviparous, viviparous?

Answer 29

Oviparous

Question 30

Which flies are associated with the "strike zone"?

Answer 30

Blowflies

Question 31

How many instars are there while blowflies feed on host tissues?

Answer 31

3

Question 32

What are the 3 genera of blowfly?

Answer 32

Calliphora Lucilia Phormia

Question 33

The primary screwworm: What is the genus and species?

Answer 33

Cochliomyia hominivorax

Question 34

True or False: Cochliomyia hominivorax (the primary screwwrom) is found in the United States.

Answer 34

FALSE

Question 35

True or False: The primary screwworm is a facultative ectoparasite.

Answer 35

FALSE The primary screwworm is an **obligate** ectoparasite.

Question 36

Where does Cochliomyia hominivorax lay its eggs?

Answer 36

Fresh, uninfected wounds of all kinds

Question 37

What allows for the elimination of the primary screwworm?

Answer 37

Traps & Sterilization programs

Question 38

The flesh flies: What is the genus?

Question 39

What are Sarcophaga females, oviparous, viviparous, etc?

Answer 39

Larviparous (lay larva)

Question 40

Sarchophaga: Falcultative or obligate parasite?

Answer 40

Falcultative

Question 41

With which do the larvae appear in the wound instantaneously?

Answer 41

Sarcophaga

Question 42

Wohlfahrtia: Falcultative or obligate parasite?

Answer 42

Obligate parasite

Question 43

Wohlfahrtia: Females are what, viviparous, oviparous, etc?

Answer 43

Larviparous (lay larva)

Question 44

Wohlfahrtia vigil pentrate normal skin of a newborn and grow in a ___ \_\_\_.

Answer 44

Hypodermal pocket

Question 45

True or False: The tough skin of older animals is not susceptible to an infection with Wohlfahrtia vigil.

Answer 45

TRUE

Question 46

1. What caused this? 2. What is the cavitation called?

Answer 46

1. Wohlfahrtia vigil 2. Hypodermal pocket