Parasitology Week 2

Question 1 of 21

1

Within the sub-order CYCLORRHAPHA what are the relevent families?

Select one or more of the following:

Oestridae
Muscidae
Hippoboscidae
Calliphoridae
Simuliidae
Psychodidae
Haematopinidae

Explanation

Question 2 of 21

1

Which stage(s) within the family Oestridae are parasitic

Select one of the following:

A. Larvae
B. Adults
C. Pupae
E. Eggs
F. Both A and B
G. Both A, B and C

Explanation

Question 3 of 21

1

This text reveals the differences between the three species of horse bot found in Australia, fill in the blanks

G. intestinalis eggs ❌, anywhere on front of body, Flies active in ❌ only live for a few days can lay many eggs hatch when ❌
G. nasalis eggs ❌, laid ❌, hatch ❌
G. haemorrhoidalis eggs ❌, laid ❌, hatch spontaneously

Drag and drop to complete the text.

yellow

grey

summer

winter

autumn

licked

a temperature of 28°C is reached

pale

blue

between mandibles

between ears

between eyes

spontaneously

black

brown

around lips

around tail

under throat

Explanation

Question 4 of 21

1

Where are the parasitic larval stages of Gasterophilus located within the horse?

Select one of the following:

First instar : migrates though mouth and gums
Second instar : attaches in stomach
Third instar : in stomach
First instar : migrates though the anus, large intestine and small intestine
Second instar : attaches in stomach
Third instar : in stomach
First instar : migrates though mouth and gums
Second instar : attaches in liver
Third instar : liver
First instar : migrates though mouth and gums
Second instar : attaches in oesophagus
Third instar : oesophagus

Explanation

Question 5 of 21

1

Identify this species of OESTRIDAE Gastrophilus.

Eggs laid between mandibles, eggs are pale, eggs hatch spontaneously.
Third instar has spines arranged in 1 row.

Select one of the following:

G. nasalis
G. intestinalis
G. haemorrhoidalis

Explanation

Question 6 of 21

1

How long can the larvae of Gastrophilus remain in the horse?

Select one of the following:

26 months
12 months
24 months

Explanation

Question 7 of 21

1

Identify this species of Oestridae Gasterophilus?

Eggs are laid anywhere on the body of the horse, eggs are yellow, eggs require moisture and friction to hatch.
Spines in 2 rows, spines slender and blunt tipped, double row reaches 10th or 11th segments dorsally and ventrally.
Mouth hooks have a saddle like depression

Select one of the following:

G. intestinalis
G. nasalis
G. haemorrhoidalis

Explanation

Question 8 of 21

1

Identify this species of Oestridae Gasterophilus

Eggs black, laid around lips, hatch spontaneously.
Spines in 2 rows, pines small; ventral side of segment 3 with 1 medially interrupted row of spins.
Mouth hooks uniformly bent

Select one of the following:

G. nasalis
G. intestinalis
G. haemorrhoidalis

Explanation

Question 9 of 21

1

What statements are true of Oestrus ovis

Select one or more of the following:

fly viviparous
flies active in summer
lays larvae on external nares and larva crawls into nasal cavity
all larval stages found in nasal cavity
pupae develop in soil
third instar sneezed out
Larvae is dark yellow with dark transverse bands on dorsal surface of segments
Larvae have large black oral hooks
Rows of small spines on ventral surface only

Explanation

Question 10 of 21

1

Identify this species of Oestridae.

Found in the nasal cavity of sheep.
The larvae have large black oral hooks and rows of small spines on the ventral surface only.
Larvae are dark yellow in colour

Select one of the following:

Oestrus ovis
Gasterophilus nasalis
Gasterophilus intestinalis
Hypoderma ovis

Explanation

Question 11 of 21

1

How does Oestrus ovis effect the sheep?

Select one or more of the following:

Agitates the sheep
Chronic nasal discharge
Predisposes sheep to pneumonia
Destroys the sheeps nasal cavity

Explanation

Question 12 of 21

1

Are any species of Hypoderma present in Australia?

Select one of the following:

Yes, Hypoderma bovis and Hypoderma lineatum
Yes, Hypoderma bovis
Yes, Hypoderma lineatum
No species of Hypoderma are present in Australia, it is a quarantine risk

Explanation

Question 13 of 21

1

Identify this species of Oestridae.

Large fly (15mm), hairy, no functional mouth parts, hairs on head, anterior thorax is yellow-white.
Eggs laid singly high up on legs, hocks and knees, or even on rump.
Usually parasitise cattle
Larvae penetrate skin and migrate via the epidural fat and encyst on back
Larvae pupate on ground, larvae robust and rounded at both ends, rudimentary mouth hooks, small spines present

Select one of the following:

Hypoderma bovis
Oestrus ovis
Gasterophilus nasalis
Gasterophilus internalis

Explanation

Question 14 of 21

1

Which of the below species belong to the family Muscidae?

Select one or more of the following:

Musca domestica (housefly)
Musca vetustissima (bush fly)
Stomoxys calcitrans (stable fly)
Haematobia exigua (buffalo fly)
Hypoderma bovis (warble fly)
Oestrus ovis (gad fly)

Explanation

Question 15 of 21

1

Identify this species of Muscidae.

Small grey fly
Introduced into Australia from South East Asia
Feed on cattle, buffalo, dogs and horses
Antennae aristate
Mouth parts well developed--> Mouth parts slender, erect and rigid
Flies remain on host (die in 1-2 days away from host). Only leave host to lay eggs (breed in cow dung)

Host effects--bites are painful, cattle rub to relieve irritation, 2000-3000 flies a heavy infection, loss of condition
Control-- fly traps, insecticides

Select one of the following:

Oestrus ovis
Haematobia exigua
Stomoxys calcitrans
Hypoderma bovis

Explanation

Question 16 of 21

1

❌ an introduced species and which causes 90% of strikes along with Lucilia sericata also introduced and found mainly in urban areas are both ❌ species of fly and have ❌ roles in fly strike

Chrysomya rufifacies and Chrysomya varipes are both native species of green fly, both primarily have ❌ roles in fly strike
The ❌ species Calliphora stygia and Calliphora augur (both natives) generally have 2º roles in fly strike
The native ❌ species Ophyra spp. has 3º roles in fly strike
Calliphora vicina an introduced ❌ species that lives in Urban areas has ❌ roles in fly strike
Sarcophaga spp. are native ❌ that have 3º roles in fly strike

Drag and drop to complete the text.

Lucilia cuprina

Musca domestica

Green

Grey

1º

2º

4º

Brown

Black

Blue

3º

Flesh flies

Explanation

Question 17 of 21

1

Lucililia cuprina is responsible for > 90% of strikes on sheep

Select one of the following:

True
False

Explanation

Question 18 of 21

1

Which larval stage is able to penetrate the skin of the sheep to begin feeding on flesh?

Select one of the following:

First instar
Second instar
Third instar

Explanation

Question 19 of 21

1

Identify this species of Calliphoridae.

-responsible for > 90% of strikes
-almost obligate parasite (can breed in carcases but outcompeted)
-first instar needs protein meal (cannot penetrate skin)
-second instar penetrates skin (feeds on flesh)
-pupates under soil
-1º role in fly strike
-Antennae aristate
-Mouthparts well developed
-Mouthparts stouter, pendant, fleshy
-Thorax without longitudinal stripes dorsally
-Abdomen green
-Abdominal segments lacking thick dark bands

Select one of the following:

Lucilia cuprina
Chrysomya rufifacies
Calliphora vicina
Lucilia sericata

Explanation

Question 20 of 21

1

Identify this species of Calliphoridae

-feeds on other maggots
-Antennae aristate
-Mouthparts well developed
-Mouthparts stouter, pendant, fleshy
-Thorax without longitudinal stripes dorsally
-Abdomen green
-Abdominal segments with thick dark bands on anterior margin

Select one of the following:

Chrysomya rufifacies
Callitroga hominivorax
Chrysomya bezziana

Explanation

Question 21 of 21

1

Identify this species of Calliphoridae.

-not present in Australia
-blue blowfly
-Antennae aristate
-eggs laid at edges of wounds
-larvae are large (up to 14 mm) densely covered with small black spines which bands on segments.
-larvae penetrate tissues, liquefying the tissues and extending the wound

Select one of the following:

Chrysomya rufifacies
Chrysomya bezziana
Callitroga hominivorax

	Created by Kathryn Borg about 8 years ago

DVM2 Parasitology Quiz on Parasitology Week 2, created by Kathryn Borg on 09/04/2016.

Parasitology Week 2

Question 1 of 21

Within the sub-order CYCLORRHAPHA what are the relevent families?

Select one or more of the following:

Explanation

Question 2 of 21

Which stage(s) within the family Oestridae are parasitic

Select one of the following:

Explanation

Question 3 of 21

Drag and drop to complete the text.

Explanation

Question 4 of 21

Where are the parasitic larval stages of Gasterophilus located within the horse?

Select one of the following:

Explanation

Question 5 of 21

Identify this species of OESTRIDAE Gastrophilus. Eggs laid between mandibles, eggs are pale, eggs hatch spontaneously. Third instar has spines arranged in 1 row.

Select one of the following:

Explanation

Question 6 of 21

How long can the larvae of Gastrophilus remain in the horse?

Select one of the following:

Explanation

Question 7 of 21

Select one of the following:

Explanation

Question 8 of 21

Identify this species of Oestridae Gasterophilus Eggs black, laid around lips, hatch spontaneously. Spines in 2 rows, pines small; ventral side of segment 3 with 1 medially interrupted row of spins. Mouth hooks uniformly bent

Select one of the following:

Explanation

Question 9 of 21

What statements are true of Oestrus ovis

Select one or more of the following:

Explanation

Question 10 of 21

Identify this species of Oestridae. Found in the nasal cavity of sheep. The larvae have large black oral hooks and rows of small spines on the ventral surface only. Larvae are dark yellow in colour

Select one of the following:

Explanation

Question 11 of 21

How does Oestrus ovis effect the sheep?

Select one or more of the following:

Explanation

Question 12 of 21

Are any species of Hypoderma present in Australia?

Select one of the following:

Explanation

Question 13 of 21

Select one of the following:

Explanation

Question 14 of 21

Which of the below species belong to the family Muscidae?

Select one or more of the following:

Explanation

Question 15 of 21

Select one of the following:

Explanation

Question 16 of 21

Drag and drop to complete the text.

Explanation

Question 17 of 21

Lucililia cuprina is responsible for > 90% of strikes on sheep

Select one of the following:

Explanation

Question 18 of 21

Which larval stage is able to penetrate the skin of the sheep to begin feeding on flesh?

Select one of the following:

Explanation

Question 19 of 21

Select one of the following:

Explanation

Question 20 of 21

Identify this species of Calliphoridae -feeds on other maggots -Antennae aristate -Mouthparts well developed -Mouthparts stouter, pendant, fleshy -Thorax without longitudinal stripes dorsally -Abdomen green -Abdominal segments with thick dark bands on anterior margin

Select one of the following:

Explanation

Question 21 of 21

Identify this species of Calliphoridae. -not present in Australia -blue blowfly -Antennae aristate -eggs laid at edges of wounds -larvae are large (up to 14 mm) densely covered with small black spines which bands on segments. -larvae penetrate tissues, liquefying the tissues and extending the wound

Select one of the following:

Explanation

Identify this species of OESTRIDAE Gastrophilus.

Eggs laid between mandibles, eggs are pale, eggs hatch spontaneously.
Third instar has spines arranged in 1 row.

Identify this species of Oestridae Gasterophilus

Eggs black, laid around lips, hatch spontaneously.
Spines in 2 rows, pines small; ventral side of segment 3 with 1 medially interrupted row of spins.
Mouth hooks uniformly bent

Identify this species of Oestridae.

Found in the nasal cavity of sheep.
The larvae have large black oral hooks and rows of small spines on the ventral surface only.
Larvae are dark yellow in colour

Identify this species of Calliphoridae

-feeds on other maggots
-Antennae aristate
-Mouthparts well developed
-Mouthparts stouter, pendant, fleshy
-Thorax without longitudinal stripes dorsally
-Abdomen green
-Abdominal segments with thick dark bands on anterior margin