VETERINARY PARASITOLOGY : DIAGNOSIS AND
CONTROL OF PARASITES IN LARGE ANIMALS EXAM
LATEST 2025/2026 QUESTIONS WITH CORRECT
VERIFIED ANSWERS
Question:1
Which of the following treatment or control strategies should be used to clear a cow of her
Tritrichomonas foetus infection?
a. Intravenous administration of antiflagellate drugs such as metronidazole
b. Oral administration of anticoccidial drugs soon after the development of clinical signs
c. Prevent the cow from breeding for at least 4 months
d. Allow the cow to breed only to a bull that is confirmed Tritrichomonas foetus negative
e. Cull the cow as the infection is permanent and cannot be cleared ..ANSWER..c. Prevent the
cow from breeding for at least 4 months
Question:2
How is Trypanosoma cruzi transmitted to the vertebrate host?
a. Through saliva during the bite of tsetse flies
b. Through saliva during the bite of sandflies in the genus Lutzomyia c. Injected by an Ixodes
spp. tick when feeding for at least 24 hours d. Through faeces during the bite of a reduviid bug
e. none of the above ..ANSWER..d. Through faeces during the bite of a reduviid bug
Question:3
Where does the female black fly (simulidae) lay her eggs?
a. Attached to rocks in fast flowing rivers and streams
b. In standing water
c. In fresh manure
,d. Attached to the hairs on the forelegs and shoulders of horses
e. In rotting organic material ..ANSWER..a. Attached to rocks in fast flowing rivers and streams
Question:4
Which parasite of horses is best diagnosed using the acetate tape technique (sticky tape to the
perineal region)
a. Anoplocephala perfoliata
b. Oxyuris equi
c. Strongylus vulgaris
d. Haematopinus asini
e. Parascaris equorum ..ANSWER..b. Oxyuris equi
Question:5
You are on a clinical rotation based in Kentucky, USA. The equine clinicians are discussing a case
of equine protozoal myeloencephalitis (EPM). Which of the following organisms causes EPM?
a. Neospora caninum
b. Eimeria leukarti
c. Anoplocephala perfoliata
d. Sarcocystis neurona
e. Toxoplasma gondi ..ANSWER..d. Sarcocystis neurona
Question:6
You are called to a beef cattle operation to investigate a history of infertility and early to mid-
gestation abortion. Upon examining the herd you find 5% of the cows have developed post
coital pyometras. Which of the following is the most likely cause of these problems?
a. Neospora caninum
b. Sarcocystis cruzi
c. Toxoplasma gondii
d. Tritrichimonas foetus
,e. Eimeria bovis ..ANSWER..d. Tritrichimonas foetus
Question:7
In nursing piglets, which of the following protozoan parasites is most likely responsible for
diarrhoea
a) Entamoeba histolytica
b) Toxoplasma gondii
c) Balantidium coli
d) Isospora suis
e) Giardia duodenalis ..ANSWER..d) Isospora suis
Question:8
How do humans acquire cycticercosis due to Taenia solium?
a. Ingestion of eggs shed in their own faeces through poor hygiene b. Ingestion of eggs in the
faeces of pigs
c. Ingestion of infected pork
d. Penetration of the skin by infectious larvae (ingestion only for tapeworm)
e. Ingestion of raw beef (T. saginata) ..ANSWER..a. Ingestion of eggs shed in their own faeces
through poor hygiene
Question:9
How is Babesia bovis transmitted to cattle?
a. Ingestion of cysts in the faeces
b. Through the bite of a sandfly
c. Ingestion of oocysts in feed or water
d. Through the bite of a tick ..ANSWER..d. Through the bite of a tick
, Question:10
You are investigating a case of diarrheal disease in a pig. On a histological section, you see large
protozoan ciliates with a large "bean shaped" nucleus associated with small lesions in the large
intestinal mucosa. What are these organisms?
a. Giardia duodenalis
b. Balantidium coli
c. Entamoeba histolitica
d. Cystoisosproa suis ..ANSWER..b. Balantidium coli
Question:11
Which of the following protozoa is an obligate intracellular parasite (that is, must invade a cell)?
a. Eimeria bovis
b. Giardia duodenalis
c. Entamoeba histolytica
d. Balantidium coli ..ANSWER..a. Eimeria bovis
Question:12
Which of the following is a zoonotic protozoa?
a. Eimeria bovis
b. Cystoisospora suis
c. Sarcocystis tenella
d. Giardia duodenalis ..ANSWER..d. Giardia duodenalis
Question:13
How do the tissues of a human become infected with the metacestode stage(s) of the pork
tapeworm, Taenia solium?
a. Ingest eggs passed in the faeces of pigs
b. Eating undercooked pork
c. Eating undercooked sheep
CONTROL OF PARASITES IN LARGE ANIMALS EXAM
LATEST 2025/2026 QUESTIONS WITH CORRECT
VERIFIED ANSWERS
Question:1
Which of the following treatment or control strategies should be used to clear a cow of her
Tritrichomonas foetus infection?
a. Intravenous administration of antiflagellate drugs such as metronidazole
b. Oral administration of anticoccidial drugs soon after the development of clinical signs
c. Prevent the cow from breeding for at least 4 months
d. Allow the cow to breed only to a bull that is confirmed Tritrichomonas foetus negative
e. Cull the cow as the infection is permanent and cannot be cleared ..ANSWER..c. Prevent the
cow from breeding for at least 4 months
Question:2
How is Trypanosoma cruzi transmitted to the vertebrate host?
a. Through saliva during the bite of tsetse flies
b. Through saliva during the bite of sandflies in the genus Lutzomyia c. Injected by an Ixodes
spp. tick when feeding for at least 24 hours d. Through faeces during the bite of a reduviid bug
e. none of the above ..ANSWER..d. Through faeces during the bite of a reduviid bug
Question:3
Where does the female black fly (simulidae) lay her eggs?
a. Attached to rocks in fast flowing rivers and streams
b. In standing water
c. In fresh manure
,d. Attached to the hairs on the forelegs and shoulders of horses
e. In rotting organic material ..ANSWER..a. Attached to rocks in fast flowing rivers and streams
Question:4
Which parasite of horses is best diagnosed using the acetate tape technique (sticky tape to the
perineal region)
a. Anoplocephala perfoliata
b. Oxyuris equi
c. Strongylus vulgaris
d. Haematopinus asini
e. Parascaris equorum ..ANSWER..b. Oxyuris equi
Question:5
You are on a clinical rotation based in Kentucky, USA. The equine clinicians are discussing a case
of equine protozoal myeloencephalitis (EPM). Which of the following organisms causes EPM?
a. Neospora caninum
b. Eimeria leukarti
c. Anoplocephala perfoliata
d. Sarcocystis neurona
e. Toxoplasma gondi ..ANSWER..d. Sarcocystis neurona
Question:6
You are called to a beef cattle operation to investigate a history of infertility and early to mid-
gestation abortion. Upon examining the herd you find 5% of the cows have developed post
coital pyometras. Which of the following is the most likely cause of these problems?
a. Neospora caninum
b. Sarcocystis cruzi
c. Toxoplasma gondii
d. Tritrichimonas foetus
,e. Eimeria bovis ..ANSWER..d. Tritrichimonas foetus
Question:7
In nursing piglets, which of the following protozoan parasites is most likely responsible for
diarrhoea
a) Entamoeba histolytica
b) Toxoplasma gondii
c) Balantidium coli
d) Isospora suis
e) Giardia duodenalis ..ANSWER..d) Isospora suis
Question:8
How do humans acquire cycticercosis due to Taenia solium?
a. Ingestion of eggs shed in their own faeces through poor hygiene b. Ingestion of eggs in the
faeces of pigs
c. Ingestion of infected pork
d. Penetration of the skin by infectious larvae (ingestion only for tapeworm)
e. Ingestion of raw beef (T. saginata) ..ANSWER..a. Ingestion of eggs shed in their own faeces
through poor hygiene
Question:9
How is Babesia bovis transmitted to cattle?
a. Ingestion of cysts in the faeces
b. Through the bite of a sandfly
c. Ingestion of oocysts in feed or water
d. Through the bite of a tick ..ANSWER..d. Through the bite of a tick
, Question:10
You are investigating a case of diarrheal disease in a pig. On a histological section, you see large
protozoan ciliates with a large "bean shaped" nucleus associated with small lesions in the large
intestinal mucosa. What are these organisms?
a. Giardia duodenalis
b. Balantidium coli
c. Entamoeba histolitica
d. Cystoisosproa suis ..ANSWER..b. Balantidium coli
Question:11
Which of the following protozoa is an obligate intracellular parasite (that is, must invade a cell)?
a. Eimeria bovis
b. Giardia duodenalis
c. Entamoeba histolytica
d. Balantidium coli ..ANSWER..a. Eimeria bovis
Question:12
Which of the following is a zoonotic protozoa?
a. Eimeria bovis
b. Cystoisospora suis
c. Sarcocystis tenella
d. Giardia duodenalis ..ANSWER..d. Giardia duodenalis
Question:13
How do the tissues of a human become infected with the metacestode stage(s) of the pork
tapeworm, Taenia solium?
a. Ingest eggs passed in the faeces of pigs
b. Eating undercooked pork
c. Eating undercooked sheep
