INSECTS: Diptera - Muscidae and Ceratopogonidae,spp.

Question 1

What are some common characteristics shared by insects?

Answer 1

• Jointed limbs
• Segmented bodies (head, thorax, abdomen)
• Exoskeleton
• 3 pairs of legs
• Antennae

Question 2

What is the life cycle for Diptera spp.?

Answer 2

Egg - Larva - Pupa - Adult

Question 3

Define myiasis, or fly strike.

Answer 3

An infestation of the body of a live animal by fly larvae that grow inside the host while feeding on its tissue

Question 4

What are instars?

Answer 4

Larvae

Question 5

Do flies and flea have the same life cycle?

Answer 5

Yes, Egg - Larva - Pupa - Adult

Question 6

True or False: Fleas, unlike lice, are host specific, and specific for their areas of infection.

Answer 6

False, lice are both host and site specific

Question 7

What life cycle do lice have?

Answer 7

Egg - Nymph (any number) - Adult

Question 8

What suborder of lice is also known as the sucking lice, moving slowly, and have a narrower head than their thorax?

Answer 8

Anoplura spp.

Question 9

What suborder of lice are associated with feeding on the skin surface, moveing fast, and having a head wider than their thorax?

Answer 9

Ischnocera (Mallophaga) spp.

Question 10

What is the common name for Musca domestica? Who are there preferred hosts?

Answer 10

House fly

Animals and humans

Question 11

While there are stickly hairs on the pads of their legs, how are mouthparts of M. domestica adapated?

Answer 11

For sponging

Question 12

Where do adult female M. domestica flies lay their eggs?

Answer 12

Any number of deaying organic materials

Question 13

What is the common name for Musca autumnalis? What sites are commonly infected?

Answer 13

Face fly

Animal secretions and wounds

Question 14

What Diptera spp. is associated with being a biological vector D. megastoma and Habronema, involved with summer sores?

Answer 14

Musca autumnalis

Question 15

What can results from M. autumnalis infestations?

Answer 15

• Annoyance; interfere with grazing or drop in performance
• Eye disorders, conjunctivitis

Question 16

What is the common name for Stomoxys calcitrans? Who are there preffered hosts?

Answer 16

Stable fly, house fly

Animals and Humans

Question 17

What is different in the mouthparts of S. calcitrans, compated to M.. domestica?

Answer 17

S. calcitrans mouthparts are rigid, and forward projecting, sitting on walls of their head

Question 18

What is different about S. calcitrans, when it comes to their meal consumption?

Answer 18

Rather that sucking mouthparts, they use theirs for blood sucking (taking up to 3 mins to complete their blood meal)

Question 19

Female S. calcitrans adults will lay their eggs -?

Answer 19

On decaying matter

Question 20

What pathogenesis is associated with S. calcitrans infestations?

Answer 20

Attacking animals, and transmitting disease organisms

Question 21

What clinical signs are associated with S. calcitrans infestations?

Answer 21

• Increased head and tail movements
• Skin twitches
• Tail swishes

Question 22

Which of the following is not associated with treatment and prevention of S. calcitrans and M. autumnalis?

A) Insecticides
B) Screens
C) Sanitation
D) Treating compost

Answer 22

D) Treating compost

Question 23

What is the common name for Haemotobia irritans? Who are there preffered hosts?

Answer 23

Horn fly

Cattle

Question 24

True or False: H. irritans, which is the largest bloodsucking muscid, can be distinguished from the S. calcitrans by its size and proboscis,

Answer 24

False, H. irritans is the smallest bloodsucking muscid, and as such, will have a shorter probocis and body size

Question 25

Adult female *H. irritans* will remain on hosts, and leave only to -?

Answer 25

Lay their eggs in fresh feces

Question 26

*H. irritans* is associated with diapause. What does this mean?

Answer 26

*H. irritans* pupa will go through a period of suspended developments during unfavorable environmental conditions (overwinter)

Question 27

What sites of infestation are associated with *H. irritans*?

Answer 27

* Back (when swarming) * Abdomen (when raining) * Horns (when not feeding)

Question 28

What pathogenesis is asociated with *H. irritans* infestations?

Answer 28

Due to feeding in the thousands, they can cause: * Intense irritation * Impaired weight gain * Loss of prod. * Vector transmission

Question 29

True or False: *H. irritans* is associated with insecticide resistance.

Answer 29

True

Question 30

What is the common name for *Culicoides spp.*? Who are there preffered hosts?

Answer 30

Biting midges Animals and Humans

Question 31

What identifying characteristics can be associated with *Culicoides spp.*?

Answer 31

* Mottled wings * Short, piercing proboscis * Long slender antennae

Question 32

What pathogenesis is associated with *Culicoides spp*. infections?

Answer 32

General annoyance, vector transmission of *O. cervicalis* and other pathogens

Question 33

What clinical signs are associated with *Culicoides spp.* infestations?

Answer 33

Pain inflicted, and allergic reactions to horses

Question 34

What can be done for treatment and prevention of *Culicoides spp*. infestations?

Answer 34

* Treat horses with insecticides or repellants * Avoid and decrease standing water (marshes, swamp, etc.)

Question 35

What is the common name for *Tabanus spp.*? Who are the hosts?

Answer 35

Horse fly Large animals, people, small mammals, and birds

Question 36

What is associated with the mouthparts of the horse fly, or *Tabanus spp.*?

Answer 36

Mouthparts for slashing and sponging

Question 37

What is the common name for *Chrysops spp*.?

Answer 37

Deer fly

Question 38

What can be used for identification of deer flies, or *Chyrsops spp.*?

Answer 38

* Elongated antennae * Dark bands across wings * Bites in shaded areas

Question 39

Is prevention possible with *Chrysops* infestations?

Answer 39

While difficult to control, as a result of breeding sites being diffuse and hard to detect, but repellens and insecticides can be used

Question 40

Who are the hosts for *Melaphongus ovinus*?

Answer 40

Sheep

Question 41

While dorsally flattened and hairy, they also have blood sucking mouthparts. *Melaphogus ovinus* is also known for not having -?

Answer 41

Wings

Question 42

How many eggs can an adult female *M. ovinus* produce?

Answer 42

A single egg, or 1

Question 43

What is the life cycle of *M. ovinus*?

Answer 43

Adult females produce an egg that hatches in their bodies, and larvae produced then attach to wool or hair, until they become adults.

Question 44

What is the common name for *Melaphogus ovinus*?

Answer 44

Sheep ked, or sheep tick

Question 45

What is the common name for *Cilicidae spp*?

Answer 45

Mosquitoes

Question 46

True or False: Mosquitoes belong to a number of generea, and their larvae develop in water.

Answer 46

True

Question 47

What maggots are associated with cutaneous myiasis, or fly strike?

Answer 47

* Calliphoridae =* Old and New World screwworm, aka Blow flies * Sarcophagidae* = Flesh flies