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Parasitology > Physaloptera spp. > Flashcards

Physaloptera spp. Flashcards

1
Q

Identify the Superfamily, the Genus Species, and the common name of this parasite.

A

Superfamily: Physalopteroidea

Genus Species: Physaloptera spp.

Common name: Stomach worm

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2
Q

What is the parasite rating of Physaloptera spp.?

A

Rating 1

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3
Q

What are the final hosts of Physaloptera spp.?

A

Dogs and cats

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4
Q

What are the intermediate hosts of Physaloptera spp.?

A

Beetles, cockroaches, crickets.

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5
Q

What are the paratenic hosts of Physaloptera spp.?

A

Snakes and birds

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6
Q

What are the characteristic features of Adult Physaloptera spp.?

A

4-6 cm, in stomach, large and resemble ascarids in size.

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7
Q

What are the characteristic features of the eggs of Physaloptera spp.?

A

Eggs are elongated, 45 micrometers, and more oval than Spirocerca Lupi eggs.

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8
Q

What kind of life cycle does Physaloptera spp. have, direct or indirect?

A

Indirect

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9
Q

Describe the life cycle of Physaloptera spp.

A

Thick shelled oval egg containing L1 larva is passed in feces or vomitus -> the egg doesn’t hatch until ingested by the intermediate host -> within the intermediate host the larva develops to the L3 and encysts -> paratenic host can be involved in which L3 becomes encysted in the viscera -> intermediate or paratenic host is ingested by the final host and the L3 is liberated and develops to the adult stage in the stomach -> nematodes live with the anterior end embedded in the mucosa.

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10
Q

What is the PPP for Physaloptera spp.?

A

8-10 weeks

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11
Q

Where is the site of infection of Physaloptera spp.?

A

Stomach

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12
Q

Describe the pathogenesis and lesions of Physaloptera spp.

A

Strong forcep-like teeth, which attach to the gastric muscoa leaving small ulcers.

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13
Q

What are the clinical signs of Physaloptera spp.?

A

Vomition and nematodes are often viewed in the stomach with endoscopy. Catarrhal gastritis and blood in feces.

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14
Q

What is the diagnosis of Physaloptera spp.?

A

Elongate eggs thickened at either pole identified in feces or vomitus. Remember they are similar to Spirocerca Lupi but are more oval in shape.

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15
Q

Is there approved treatment and prevention for Physaloptera?

A

No but there are various products used such as Ivermectin and Fenbendazole

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16
Q

What is this image showing?

A

Adult Physaloptera spp. infesting the mucosa in the stomach.

17
Q

What is this image showing?

A

Physaloptera spp. egg containg larvae.

18
Q

What parasitic species does this egg belong to?

A

Physaloptera Spp.

Parasitology (11 decks)

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