Endoparasites Flashcards
(39 cards)
If you don’t know it already, work out what parasite Toxocara canis is, based on the scientific or latin nomenclature.
- Toxocara = roundworm
- Canis = dog
So… the Dog roundworm!
- Toxo = Latin for toxon = bow or quiver
- Caro = flesh = infected through eating raw meat/flesh
What does the prefix Toxo mean in Toxocara canis?
Latin for toxon (Toxin)
= bow or quiver
= associated with poison back in the day
What does the suffix cara mean in Toxocara canis?
Latin for caro
= flesh
= infected through eating raw meat/flesh
+
Also feed on the ‘flesh’ or rather intestines of the dog
Give an example to when the ‘organ of preference’ helps name a parasite
- Thelazia = eyeworm
- Dirofilaria immitis = heartworm
- Thelazia = from their family (genus) Thelazidae (also known as thelaziasis or spelled as thelaziosis)
- Dirofilaria = from the genus Filarioidea
What does the prefix Diro mean in Dirofilaria immitis?
Latin for dirus
= fearful or ominous
What does the suffix filaria mean in Dirofilaria immitis?
Latin for filum
= thread
Name the 1 main defining
characteristic of the Thelaziidae genus
They do not possess a circulatory or respiratory system (like all nematodes)
Name 5 defining characteristics of the Filarioidea genus
- Slender, thready body
- Simple anterior end
- Inconspicuouss oral lips
- Esophagus lacks a bulbus
- Often unequal + dissimilar copulatory spicules in the male
Large superfamily of nematodes
Some parasites are given their common name, due to their distinctive shape.
Name an example of a nematode.
Trichuris = Whipworm
From the Trichuridae genus..
Remember the prefix ‘Trich’ can also be used to denote hair too, as this is similar to whip, it suggest a long parasite, such as a worm..
Why is Trichuris, common name ‘Whip-tail’ not an accurate representation of this parasite?
Because Trichuris doesn’t have a whip-like tail, it actually has a whip-like head!
(The head invades + attaches to the mucosa of the cecum, colon + rectum)
Name 4 defining characteristics of the Trichuridae genus
- Live in the intestines of vertebrates
- Slender body
- Thickened posterior end
- Tubular capillary esophagus
Some parasites are given their common name, due to their distinctive shape.
Name 2 examples of a intestinal nematode of dogs + cats.
- Ancylostoma spp caninum = Dog hookworm
- Uncinaria stenocephala = hookworm
What does the prefix Ancylo in Ancylostoma spp caninum denote?
Greek for ankýlos
= bent or crooked
What does the suffix stoma mean in Ancylostoma spp caninum?
Stoma = mouth
What does the prefix Unicinaria mean in Uncinaria stenocephala?
Latin for Uncinus
= Hook
What does the suffix stenocephala mean in Uncinaria stenocephala?
- Steno = latin for stent
= narrow - Ceph = latin for defined + narrow head
What does the suffix ‘tode’ usually denote in parasites?
Worm
What 3 taxonomic groups can be collectively known ass Helminths?
+
What does Helminth mean?
- Nematodes, Cestodes + Trematodes
- Helminth = worm
Name 2 common facultative parasites that often opportunistically enter the host + produce infection
- Strongyloides worms
- Free-living amoebae
What wild animal does Angiostrongylus vasourm primarly infect?
Foxes
What is the common name for Angiostrongylus vasourm?
Lungworm
Where does Toxocara canis, the roundworm, complete its larval stage within the dog?
Within the muscle
