Image Review Flashcards
Identify the parasite. What is the site of infection?
Ascaris suum
small intestine
Identify this parasite of pigs that causes “milk spots.” How would you treat the pigs?
Ascaris suum
Treat & clean sows 2 weeks before farrowing, then again at weaning
Identify the parasite. What is its common name?
Ascaris suum
Pig roundworm
Identify this parasite of pigs. What is the common name? What are you likely to see in feces?
Strongyloides ransomi
Common name: threadworm
Embryonated eggs and L1 in feces
What is the site of infection for this pig parasite?
Strongyloides ransomi
Small intestine
L3 skin penetration by this parasite causes:
erythema
(Strongyloides ransomi)
What is the scientific name of the nodular worm pictured? What is its site of infection?
Oesophagostomum spp.
Large intestine
This parasite was identified in a blood smear of a cat that died after having pyrexia, anemia and icterus.
What is the parasite? To which taxonomic class does it belong?
Cytauxzoon spp.
Class Piroplasmidia
This organism parasitizes the distal parts of equine limbs.
Identify the parasite. Describe the mouthparts.
Chorioptes spp with rounded mouthparts
These organisms were seen in a canid fecal examination.
What are the parasites?
Trichuris, Capillaria and coccidian oocysts.
A dog has been regurgitating persistently. These eggs were observed in the fecal examination.
What is the parasite? Which diagnostic tool was used?
Spirocerca lupi.
Fecal floatation.
A dog was admitted to the hospital with diarrhea and erythema. These parasites were identified in fresh feces.
What is the parasite?
Larvae of Strongyloides stercoralis
These parasite eggs were identified in a fecal examination of a cat. What type of eggs are these?
Taenia eggs
This parasitic organism was noted in a fecal examination from a dog.
Identify the parasite.
Dipylidium caninum.
Several eggs are observed in the fecal examination of a dog.
Identify the parasite. Which diagnostic method was used?
Nanophyetus salmincola, recovered with the sedimentation method
Sheep and goats are parasitized by these organisms. What is the common name?
“Sheep tick”
Identify the parasite. What is its common name?
Argas spp.
Fowl tick
Identify this parasite of cats. What is the site of infection?
Otodectes cynotis. Ears.
This egg (130 µm) was identified in an ovine fecal examination. Identify the parasite. What is its common name?
Nematodirus spp.
Long neck bankrupt worm
This parasite was found on a dog. What is it? What is its common name?
Trichodectes canis.
Dog biting louse.
This parasite was identified in the fecal examination of cattle grazing in a marsh. Clinical signs include edema, bottlejaw and anemia.
Identify the parasite. Which diagnostic method was used?
Fasciola hepatica egg.
Sedimentation
Identify this parasite of dogs. What is the site of infection?
Demodex canis
Hair follicles and sebaceous glands.
Identify this avian parasite. What is its common name?
Cimex spp.
Bedbug, bird bug, bat bug
This parasite infects swine and is 150 µm in size.
Identify the parasite. What is its key clinical sign?
Balantidium spp.
Dystentery & diarrhea.
This deformed beak was caused by which avian parasite?
Where does the life cycle take place?
Knemidocoptes spp.
Entire life cycle occurs on host.
Identify this parasite found in sheep.
What is its site of infection?
Oestrus ovis.
Nasal passages
This parasite was found during the fecal examination of a sheep.
Identify the parasite. Which stage(s) cause the main pathogenesis? What is the most prominent sign in severe infections?
Nematodirus spp. (Long neck bankrupt worm)
Larval stages cause the most pathogenesis.
Diarrhea is the main clinical sign
Identifiable in a blood smear, these parasites cause anemia, depression and anorexia in a dog.
Identify the parasite. What condition does it cause?
Babesia canis.
Canine pioplasmosis/babesiosis
What type of egg is this?
Strongyle egg.
Can be differentiated by culturing to 3rd stage larva
This is from a fecal examination in a donkey. The size is 40-52 X 32-40 µm.
Identify the parasite. How soon are larvae present in the milk of a mare?
Strongyloides spp.
Larvae present in milk of mare by 4th day.
These eggs were found in a fecal exam of a swine.
Identify the egg in the top left of the picture. What about the other 2 eggs?
Three Ascaris suum eggs.
The two on the right have lost their thick outer coating.
Identify this equid parasite.
What is the infective stage?
Anoplocephala spp.
Cysticercoid is the infective stage
This parasite (400 µm) was found in a fresh horse fecal examination.
Identify the parasite. What is its common name? Site of infection?
Dictyocaulus arnfieldi
Lungworm
Site of infection: bronchi of lungs
These parasites commonly infest rabbits, rodents and also cats and dogs in the subcutaneous tissue.
Identify the parasite.
Cuterebra spp.
This organism is called “nodular worm” in swine.
Identify the parasite. What is the infective stage?
Oesophagostomum spp. egg
Infective stage: L3
This parasite was recovered from the inguinal region of a dog and caused paralysis.
Identify the parasite. What is its common name?
Ixodes spp.
Black-legged tick; deer tick
Which three parasites are pictured here?
(from fecal smear of a canid)
- Toxocara canis
- Isospora spp.
- Ancylostoma caninum
This is an egg of the pig lungworm. What is the scientific name? What is/are the intermediate host(s)?
Metastrongylus spp.
Intermediate hosts are earthworms
This parasite (300 µm) was identified in a fresh fecal examination from sheep and goats.
Identify the parasite. What is its diagnostic stage? Which diagnostic method is used?
Muellerius spp. (Lungworm)
L1 is isolated using the Baermann method.
**Remember, look for the S-shaped kink in the tail
This parasite was recovered from the stomach and rectum of an equid.
Identify the parasite. Where do you find the eggs of this organism?
Gasterophilus spp.
Eggs on hair of forelegs and shoulders or intermandibular area
This parasite was found by you on a bird during daytime.
Identify the parasite. What is its common name?
Ornithonyssus spp.
Fowl mite
**This is the most common poultry mite
A dog fecal floatation revealed these parasitic organisms. (75-90 x 60-75 µm).
Identify the parasites shown.
Toxocara canis and Toxoscaris leonina eggs
These parasite stages were identified in an equine fecal examination and measure 85-95 X 40-45 µm.
Identify the parasite. What is its common name. What is the infective stage?
Oxuris equi. (Large pinworm)
Infective stage: L3
This parasite causes catarrhal gastritis in dogs and cats. Identify the parasite. What is the appropriate treatment for this parasite?
Physaloptera spp. (Stomach worm)
No treatment
