Key Terminology & Definitions Parasites

Question 1

Dirofilaria immitis

Answer 1

Heartworm (nematode)

Question 2

Microfilaria

Answer 2

Larval stage of dirofilaria (infectious stage)

Question 3

Endosymbiont

Answer 3

Organism that lives within cells

Question 4

Schistosomes

Answer 4

Blood flukes (trematodes)

Question 5

Dictyocaulus

Answer 5

Lungworm (nematode)

Question 6

Patent phase of dictyocaulus

Answer 6

When can see L1 larvae in faeces

Question 7

Metastrongyles

Answer 7

Lungworm (nematode), Angiostrongylus (dogs), Aelurostrongylus (cats), Metastrongylus (pigs), Muellerius, Protostrongyulus, Cystocaulus (sheep and goats)

Question 8

Verminous pneumonia

Answer 8

Any pneumonia of nematode origin

Question 9

Pre-patent period (PPP)

Answer 9

Period from infection to L1 larvae produced in faeces

Question 10

Hydatid

Answer 10

Cyst containing watery fluid, in particular one formed by and containing a tapeworm larva.

Question 11

Protoscolex

Answer 11

Juvenile scolex formed from the germinal layer of a hydatid metacestode (tiny adult tapeworm)

Question 12

Sylvatic cycle

Answer 12

Between non-human primates (e.g., monkeys) and mosquito species found in the forest canopy

Between wild animals and vectors. Humans are usually an incidental or dead-end host, infected by a vector.

Question 13

Trichinella

Answer 13

Nematode of striated muscles, causes trichinosis, people and animals infected through ingestion of meat containing larval cysts (direct)

Question 14

Autochthonous cases

Answer 14

Endemic