Ch 45 Parasitology Part 2 Flashcards
What is Ollulanus tricuspis?
The feline trichostrongyle.
How is vomiting in cats mostly identified?
By examination of vomitus with a dissecting microscope.
What type of worms are Strongyloides sp.?
Intestinal threadworms.
What is unique about the reproductive structure of Strongyloides sp.?
Only a parthenogenetic female is parasitic; no parasitic males.
What is the characteristic feature of larvae in Rhabditoidea?
They have a club-shaped esophagus.
What diagnostic method is used for Rhabditoidea?
Fresh fecal flotation diagnosis.
Where are adults of Metastrongyloidea typically found?
In the bronchioles, mostly in nodules in the lung parenchyma of sheep and goats.
What happens to the eggs of Metastrongyloidea in the host?
Eggs develop in the lungs and the first stage larvae are coughed up, swallowed, and passed out with the feces.
Where are Trichuroidea typically found?
In the cecum and colon.
What is the common canine whipworm?
Trichuris vulpis.
What are the rare feline whipworms?
T. campanula and T. serrata.
What is the egg characteristic of Trichuris sp.?
Thick, yellow-brown symmetrical shell with polar plugs at both ends.
What is Capillaria plica also known as?
Pearsonema plica.
Where is Capillaria plica found?
In the urinary bladder of dogs and cats.
What is Trichinella spiralis associated with?
Raw or undercooked pork.
What is the human pinworm?
Enterobius vermicularis.
What is the pinworm of horses?
Oxyuris equi.
Are pinworms parasites of dogs and cats?
False; they are not parasites of dogs and cats.
What are Habronema sp. and Draschia megastoma parasites of?
Horses.
Where are larvae of Habronema sp. found?
In skin lesions or summer sores.
What is Thelazia californiensis?
Eyeworm of dogs and cats.
What is the life cycle requirement of Dracunculoides?
A copepod intermediate host.
What is Dioctophyma renale commonly known as?
Giant kidney worm of dogs.
Where does Dioctophyma renale infect?
The right kidney.
What is Dirofilaria immitis commonly known as?
Canine heartworm.
What is the most important parasite of the vascular system in domestic animals in the United States?
Dirofilaria immitis.
What is the prepatent period for Dirofilaria immitis?
6 months.
What methods are used for diagnosing Dirofilaria immitis?
- Observing microfilariae in blood samples
- Modified Knott test
- Commercially available filter techniques
- Immunodiagnostic tests.
What are the developmental stages of nematodes?
- Egg
- Four larval stages
- Sexually mature adult.
What are the infective stages of nematodes?
- An egg containing a larva
- A free-living larva
- A larva within an intermediate host.
What is the difference between direct and indirect lifestyle in nematodes?
Direct lifestyle has no intermediate host; indirect lifestyle requires an intermediate host.
How can nematode parasites be transmitted to new definitive hosts?
- Ingestion
- Skin penetration
- Ingestion of the intermediate host
- Deposit on the skin by an intermediate host.
What are some common nematode parasites of dogs and cats?
- Toxocara sp.
- Ancylostoma sp.
- Trichuris sp.
- Dirofilaria immitis.
