Superfamily Trichuroidea (Cram)

What are the five Superfamily Trichuroidea genera of interest?

1. Trichuris

2. Trichinella

3. Capillaria

4. Pearsonema

5. Eucoleus

What is the common name for Trichuris?

Whipworms

What is the Trichuris species for dogs?

Trichuris vulpis

What is the Trichuris species for cattle?

Trichuris globulosa

What are the two sites of Trichuris in the host?

1. Cecum

2. Colon

What is the infective stage of Trichuris?

L1

What is the lifecycle of Trichuris?

Direct

What is the appearence of Trichuris eggs?

Lemon shaped, with polar plugs

Which genus species is known as the "outstanding non–conformist" of the nematodes?

Trichinella spiralis

What is the common name of Trichinella spiralis?

Garbage worm

What is the Trichinella species for wildlife, especially bears?

Trichinella nativa

Trichinella spirialis can be found in most mammal omnivores and carnivores, but from a zoonotic perspective, what are the four most important hosts in Canada?

1. Pig

2. Bear

3. Walrus

4. Man

True or false: In Canada, people usually contract Trichinella spiralis from undercooked pork

False. For Trichinella spiralis pigs are considered "free of parasite" in Cananda. Infection is more likely with wild game meats

What is the site of adult Trichinella spiralis?

Small intestine

What is the site of Trichinella spiralis L1 larvae?

Various areas. Striated muscle, cardiac muscle, and the brain

What is the life cycle of Trichinella spiralis?

Indirect

How is Trichinella spiralis identified?

Presence of coiled larvae in striated muscle

What are the two forms of Trichinosis/Trichinellosis in humans, which is more dangerous?

1. Intestinal form

2. Muscular form – More dangerous, can result in death from paralysis of respiratory muscles

Which genus in Superfamily Trichuroidea affects birds and poultry?

Capillaria

What genus species of Superfamily Trichuroidea infests the nasal passages, trachea, and brochi of its host

Eucoleus aerophilus

What genus species of Superfamily Trichuroidea infests the liver of its host?

Capillaria hepatica

What two genus species of Superfamily Trichuroidea infests the urinary bladder of its host?

1. Pearsonema plica

2. Pearsonema feliscati

Eggs of genera Capillaria, Pearsonema, and Eucoleus are similar to Trichuris, what is slightly different about their shape?

More barrel shaped

What is the lifecycle of genera Capillaria, Pearsonema, and Eucoleus. Direct, indirect, or variable?

Variable

Which Trichuroidea genus species may result in your pet house soiling?

Pearsonema plica

Why is treatment theoretically not necessary to treat Pearsonema plica?

It is a self–limiting infection, if no more intermediate hosts are ingested by the definitive host, the roundworms will die out