credit 2 2025

alt untatt dokumentet som heter 10 april.

Coprological examination of sheep faeces revealed the following eggs: give name and describe!

Moniezia Expansa:

• small

• polyhedric shape

• 3 thick shells + pyroform apparatus

• embryonated (oncosphere)

• grey/transparent

Dicrocoelium Dendriticum:

• small

• oval, symmetrical

• 2 thin shells

• Embryonated (miracidium)

• brown

Plerocercoid is ...........................1............................ and is created in (where/host) .........................2...............................

1. Infective larval stage of some cestodes

2. 2nd IH (usually fish)

Which of the following types of helminths do not parasitize domestic pigs?

a) Ascaris suum
b) Metastrongylus confusus
c) Strongyloides westeri
d) Trichuris vulpis
e) Oesophagostomum radiatum

c og d

Coenurus serialis is larvocyst of:

a) Taenia ovis
b) T. saginata
c) T. multiceps
d) T. serialis

d

Trichostrongylus axei belongs to:

a) Ascaridida
b) Strongylida
c) Oxyurida
d) Spirurida
e) Enoplida

b

Protandric hermaphroditism is characteristic of:

a) Nematoda
b) Trematoda
c) Cestoda
d) Acanthocephala

b og c

Briefly but accurately describe the development cycle. Indicate what parasite it is.

Echinococcus multilocularis:

1. FH: dogs/foxes, intestine - adult

2. egg released in feces

3. IH: Rodents/ human: ingests egg

4. Egg → oncoshere → hatches: penetrate intestinal wall → multiocular hydatid cyst (liver)

5. FH eats infected IH

Following the dehelminthisation of domestic swine, the following nematodes have been found in faeces; write the species name.

Ascaris Suum

Which of the following types of nematodes parasitize in sheep?

a) Strongyloides westeri
b) Strongyloides ransomi
c) Strongyloides stercoralis
d) Strongyloides papillosus

d

Embryogony in flukes, where?

in FH or environment,

occurs inside egg

Larvocyst of Taenia multiceps is called

Coenurus

Which of the following is NOT located in lungs

a. Fasciolopsis:

b. Paragonimus

c. Schistosoma:

d. Heterophyes:

a c og d

Juvenile Fasciola located

Liver parenchyma

Dictyocaulus filaria has (direct or indirect LC)

Direct

Oesophagostomum radiatum is parasite of:

cattle

Carnivore roundworm does not include:

a) Toxocara canis

b) Toxascaris Vitulorum

c) Ancylostoma caninum

d) Trichinella spiralis

b. (bovine)

Egg of Parascaris equorum is size:

medium

Strongyloides stercoralis is parasite of:

humans and dogs

Life cycle

Paramphistomum cervi:

• Eggs hatch in water → miracidium

• Enters IH: water snail → sporocyst → redia → cercaria

• Encyst on plants (as metacercaria)

• FH: ruminants ingest → excyst in duodenum → adults in rumen.

What is the name of embryo of Cyclophyllidea and where does it develop?

Oncosphere; develops in the IH

Coprological exam: name the parasitic egg and describe

Dipylidium Caninum:

• small

• spherical

• 3 thick shells

• embryonated w/oncosphere (cocoon)

• Brown

coprological examination from carnivore. name and describe the egg

Toxocara Canis:

• medium

• subspherical

• 3 thick shells

• unembryonated

• dark grey

Ancylostoma Caninum:

• medium

• oval, symmetrical

• 2 thin shells

• unembryonated, blastomeres

• Grey

Helminths in small intestine of horse:

Parascaris equorum,

Strongyloides westeri,

Anoplocephala perfoliata

Bilde av lungworm, which one + diagnostic:

→ Likely Dictyocaulus viviparus (cattle)
→ Diagnosis: Baermann technique to detect larvae in feces

What is it:

Plerocercoid: Larval stage of Diphyllobothrium spp.

Botrium, scolex, neck, strobila, proglottid

Virkestoff i behandling av Moniezia:

Praziquantel or Albendazole

Virkestoff i behandling av paramphistomum i ruminant:

Oxyclozanide, Niclosamide, Closantel

Draw and describe Dipylidium caninum: (egg and adult)

Egg:

• small

• spherical

• 3 thick shells

• Embryonated (oncosphere)

• Brown

Gravid Proglottid:

• 2 lateral genital pores on each side

• Contain cocoons w/10-30 eggs

Life cycle: name the parasite and describe:

Taenia multiceps:

• Eggs ingested by IH: sheep

• oncosphere hatches, migrates to CNS → forms coenurus

• FH: dog eats infected tissue → adult in intestine → eggs passed in feces.

Helminths in dog:

Toxocara canis,

Ancylostoma caninum,

Dipylidium caninum,

Trichuris vulpis,

Taenia multiceps

Bilde av en fisk med displaced fins og involler elns (mc):

plerocercoid infection in fish (e.g. Diphyllobothrium larva)

name and decribe the parasite:

Moniezia Expansa:

• two lateral genital pores; contains square/triangular eggs

• interproglottid pores are longer than benedeni

Adult whipworms are present in (which part of intestine):

Cecum and colon

name the parasite and describe egg:

Moniezia spp.:

• medium

• polyhedric shape

• 3 shells

• embryonated

• transparent

name the parasite and describe egg:

Nematodirus spp.:

• XL

• oval, symmetrical

• 2 thin shells

• unembryonated, 8 blastomeres

• light grey

This egg was found after coprological examination of Horse feces. Name the parasite and describe egg:

Strongylus spp.:

• medium

• oval

• 2 thin shells

• unembryonated, many blastomeres

• grey

What emerges from egg of digenean trematodes:

Miracidium