Deck 15 Flashcards
strongyloides Westeri is a parasite of
horses
which stage invades the FH in Trematoda
metacercariae
who has hydatid cyst
echinococcus granulosa, e.multilocularis
LC of toxocara leonina - direct or indirect
direct (but can have PH - rabbit, rodents)
what method is used for to detect lung worms in pigs
ovoscopy, flotation method with breza
what is the site of heterakis gallinarum
cecum of birds (gallifomres)
in pseudophyllidae - what stage comes before the the adult
plerocercoid
or spargana for Spirometra mansonoides in humans
-> inf stage
toxocara vituxlorum is parasite of
cattle and buffalo
how many mouths and larval stage are there in nematodes
4 mouths and 5 larva stages the comes the adult
picture of ascaris suum
picture of nematodirus spp
picture of aspicularis tetraptera in mouse
neamthelminthes are which type of worm
roundworms - nematodes
helminths in pigs
which method do we use for diagnosis of intravital worms in ru
flotation method with breza solution and sedimentation methods
worms in horse
lc of metastrongylus in pigs
✅ 1. Adult worms:
Found in the bronchi and bronchioles of pigs
Lay eggs containing L1 larvae, which are coughed up, swallowed, and passed in feces
✅ 2. Intermediate host:
Earthworms 🪱 act as the intermediate host
Eggs with L1 are ingested by earthworms
Inside the worm → L1 → L2 → L3 (infective stage) develops
✅ 3. Pig gets infected:
Pig becomes infected by eating an earthworm containing L3 larvae
✅ 4. Larval migration:
L3 larvae are released in the intestine → migrate via bloodstream/lymphatics → to lungs
Larvae mature into adults in bronchioles and bronchi
picture of eggs
toxocara canis which animal and where
lc of Fasciola hepatica
✅ 1. Adult fluke in liver:
Lives in the bile ducts of the liver of the definitive host (sheep, cattle, humans)
Lays unembryonated eggs → passed in feces
✅ 2. Eggs in water:
Eggs embryonate in water
Release miracidium (ciliated larva)
✅ 3. Miracidium infects intermediate host:
Infects a freshwater snail (e.g., Lymnaea spp.)
Inside snail:
Miracidium → sporocyst → redia → cercaria
✅ 4. Cercaria leaves snail:
Free-swimming cercaria emerges from the snail
Encysts on aquatic vegetation → becomes metacercaria (infective stage)
✅ 5. Ingestion by definitive host:
Animal (or human) ingests vegetation (e.g., watercress) with metacercariae
Excyst in intestine → migrate through intestinal wall, peritoneum, then liver parenchyma → reach bile ducts
