Credit 2 parasitt - 10.april 2025

Draw and describe trichuris spp.

- Medium

- Lemon shape with 2 polar plugs

- 2 thick shells

- Unembryonated

- Brown

Which parasites are not in lungs:

a. metastongylus

b. Metastrongylidae

c. protostrongylus

d. Dictyocaulus

e. Angiostrongylus

f. paragonimus

g. Fasciolopsis

h. Schistostoma

g og h

These eggs where found by coprological examination in dogs, identify and describe:

Toxocara canis:

• medium

• spherical

• 3 thick shells

• unembryonated

• brown

Ancylostoma caninum:

• medium

• oval

• 2 thin shells

• unembryonated

• grey

Name active substance in pharmalogical drug for infection of moniezia spp. in Ruminants:

albendazole

Name active substance in pharmalogical drug for infection of small strongyles in horses:

• moxidectin

• ivermectin

• fenbendazole

• oxibendazole

Strongyloides stercalis is in what host?

human

Oesophagostomum radiatum is in what host?

cattle

Cystogony of trematodes occur where?

in environment

larvacyst of taenia multiceps:

Coenurus cerebralis

What is name of embryo in cyclophyllidae and where does embryogony occur?

• Oncosphere (inside embryonated egg in gravid proglottidis)

Dictycaulus has:

Direct life cycle

Name helminths of small intestine of horse:

• Parascaris equorum

• Anoplocephala magna

• Paranoplocephala mammilana

• Strongyloides westeri

What worm is this and what is diagnostic method?

• Muellerius capillaris

• Larvoscopy - Vajda or baerman method

During coprological examination of dogs feces, tapeworm proglottidis were found, write genus name: __1__ write infective stage: __2__, and what path of infection: __3__, and describe egg: __4__

1. Diphylidium caninum

2. Cysticercoid

3. oral ingestion of IH (mites) containing cysticercoid

4. small

   spherical

   3 thick shells

   embryonated with oncosphere

   grey

Eggs parascaris equi belong to what size category?

Medium

Where is juvenile in fasciola hepatica located?

liver

What is intermediate host of ascaris suum?

has no IH host

What is this?

• Larval stage of pleurocercoid

• has bothrium

• occuring in IH2 (fish) of pseudophyllidea

• (e.g. diphyllobothrium latum)

Briefly but accurately describe developmental stages and indicate parasite:

Parahistomum cervi:

1. unembryonated eggs in feces

2. Embryogony: egg embryonates in environment (water)

3. miracidium hatches from egg and infects water snail

4. Parenthogony: miracidium enters snail, lose cilia and develops into mother sporocyst, then develops into Redia, then into Cercaria

5. Cystogony: cercaria leaves snail, attach to plant and lose tail, developing into metacercaria (infective stage)

6. metacercaria is ingested

7. metacercaria travels through GIT, to intestines then to rumen

8. Maritogony: 25% of life cycle, metacercaria burrows into ruminal wall and develops into adult