GAB - Parasitology

Ostertagia affects the

• Omasum

• Reticulum

• Abomasum

• Small Intestine

• Large Intestine

What is considered the infectious stage of Ostertagia?

• L1

• L3

• L5

• L4

Arrested development of Ostertagia larvae occur in which type of disease?

• Type 1

• Type 2

• Type 3

Which herd would have a higher risk of developing Ostertagia?

• Beef cattle that calve in autumn

• Beef cattle that calve in spring

Which of the following is considered the infectious stage of Eimeria?

• Unsporulated oocyst

• Spourlated oocyst

• Sporocyst

• Sporozoite

• Miracidium

What is the first motile stage of Eimeria?

• Sporulated Oocyst

• Sporocyst

• Sporozoite

• Trophozoite

• Merozoite

• Miracidium

How many sporozoites does each Eimeria oocyst contain?

• 4

• 2

• 8

• 6

Which of the following is considered a malabsorptive species of Eimeria?

• E. acervulina

• E. tenella

• E. necatrix

• E. brunetti

Which species of Eimeria affects the cecum of a chicken?

• E. acervulina

• E. tenella

• E. maxima

• E. necatrix

Ionophores target which stage of Eimera's life cycle?

• Sporocyst

• Sporozoite

• Merozoite

• Schizont

• Miracidium

Which parasite can cause autoinfection?

• Cryptosporidium

• Giardia

• Eimeria

• Ostertagia

Which parasite has an INDIRECT life cycle?

• Ostertagia

• Cryptosporidium

• Angiostrongylus

• Dictycaulus viviparus

Black disease is a possible consequence of which parasite?

• Fasciola hepatica

• Filaroides oslerus

• Dictyocaulus viviparus

• Babesia

Which parasite uses a fungus to spread across distances?

• Dictyocaulus viviparus

• Toxocara canis

• Echinococcus granulosus

• Metastrongylus

• Fasciola hepatica

What is considered the first motile stage of Fasciola hepatica?

• miracidium

• sporocyst

• redia

• cercaria

• metacercaria

• sporozoite

Which type of fasciolosis will not result in the production of eggs?

• Acute

• Sub-acute

• Chronic

• Subclinical

What is the PPP of Fasciola hepatica?

• 4-6 weeks

• 8-12 weeks

• 6 months

• 3.5 weeks

Which species is considered the least susceptible to Fasciolis?

• Sheep

• Cattle

• Pigs

Which of the following stages of Fasciola hepatica does NOT undergo asexual replication?

• Sporocyst

• Redia

• Cercaria

Which of the following parasites does NOT infect cattle?

• Dictocaulus viviparus

• Fasciola Hepatica

• Dirofilaria immitis

• Echinococcus ortleppi

Infection with Dictcyocaulus viviparus results in the excretion of...

• Sporulated oocysts

• L1 stage larvae

• L3 stage larvae

• Unsporulated oocysts

In the tick, babesia is transmitted via

• trans-stadial transmission

• trans-ovarial transmission

What Toxoplasma life cycle stage is only found in chronic infections?

• Bradyzoites

• Tachyzoites

• Sporozoites

• Sporulated Oocysts

In sheep, Infection of Toxoplasma in early pregnancy results in...

• foetal death and resportion

• foetal death with a mummified foetus

• stillborn or weak lambs

What is the main intermediate host of Echinococcus granulosus?

• Horses

• Molluscs

• Sheep

• Canids

Which of the following is NOT a life cycle stage of lice?

• louse

• nit

• larvae

• nymph

Methoprene is a synthetic hormone that disrupts flea development by mimicking....

• insect juvenile hormone

• insect moulting hormone

• insect growth hormone

• insect pupae hormone

Which of the following pictures depicts a chewing lice?

Which of the following is considered a 3-host tick?

• Boophilus spp.

• Hyalomma spp.

• Ixodes spp.

Which mouthpart do ticks use to cut through skin?

• chelicerae

• hypostome

• palps

• scutum

Which of the following is absent in soft ticks?

• scutum

• palps

• chelicerae

• hypostome

Which of the following is Ixodes spp. NOT a vector for?

• Lyme disease

• Louping ill

• Babesiosis

• Bluetongue virus

Which of the following is a vector for Schmallenberg virus?

• Culicoides spp.

• Ixodes spp.

• Musca spp.

• Sarcoptes spp.

Which of the following parasites undergoes only asexual reproduction?

• Babesia

• Eimeria

• Fasciola

• Cryptosporidium