Parasitology Lab Midterm Flashcards
Host: Canine and Feline
Size: 16 mm long 8 mm wide

- Paragonimus kellicotti
- Lung fluke
- Canine and Feline
- crayfish
- Lungs
- Fecal float
- Yes; ingestion of intermediate host
- Leaf-shaped body, oral and ventral sucker, no anus
- none; coughing, dyspnea, pneumothorax
- Tetracyclines
Host: Canine, Feline, Human
Size: 50 cm

- Dipylidium caninum
- Tapeworm
- Canine, Feline, Human
- Flea
- Lumen in small intestine
- Fecal float; tapeworm crush
- Yes; ingestion if intermediate host
- Cucumber-seed shape; bilateral genital spore; Scolex with 4 Acetabula; Rostellum with rose-thorn like hooks
- None
- Droncit
Host: Feline
Size: 2-8 mm

- Echinococcus multilocularis
- Hyatid Cyst Tapeworm
- Feline
- Rodent
- Lumen in small intestine
- Fecal float; Tapeworm crush
- Yes; ingestion of intermediate host
- 4-5 oblong segments; very pronounced Acetabula looks like eyes
- None
- Droncit
Host: Canine and Feline
Size: 75-118 um

- Paragonimus kellicotti
- Lung fluke
- Canine and Feline
- crayfish
- Lung
- Fecal float
- Yes; ingestion of intermediate host
- Operculum with shoulders, shell is thicker opposite to operculum
- None, coughing, dyspnea, pneumothorax
- Tetracycline
Host: Canine and Feline
Size: 80 um

- Uncinaria stenocephala
- Hookworm
- Canine and Feline
- None
- Small intestine
- Fecal Float
- No
- Morula; identical to Ancylostoma only bigger
- coughing, diarrhea, vomiting, constipation, dark tarry stool, asymptomatic
- ivermectin
Host: Feline
Size: 10-20 mm

- Anyclostoma tubaeforme
- Hookworm
- Feline
- None
- Small intestine
- Fecal Float
- Yes; ingestion of eggs or cutaneous larval migration
- 3 pairs ventral teeth; anterior end bent slightly
- coughing, vomiting, diarrhea, constipation, dark tarry stool, asymptomatic
- Ivermectin
Host: Feline
Size: 65 um

- Ancylostoma tubaeforme
- Hookworm
- Feline
- None
- Small intestine
- Fecal Float
- Yes; ingestion of eggs or cutaneous larval migration
- Oval in shape; colourless; morula inside
- coughing, vomiting, diarrhea, constipation, dark tarry stool, asymptomatic
- Ivermectin
Host: Fish-Eating Mammals
Size: 2-12 cm

- Diphyllobothrium latum
- Broadfish Tapeworm
- Fish-Eating Mammals
- Fish
- Lumen in small intestine
- Fecal float; tapeworm crush
- Yes; ingestion of intermediate host
- Brown dot in center of each segment (uterus); Scolex has no suckers but Bothria (slit-like grooves)
- None
- Droncit
Host: Canine
Size: 10-100 cm

- Taenia pisiformis or Taenia serialis
- Tapeworm
- Canine
- Rabbit
- Lumen in small intestine
- Fecal Float, Tapeworm Crush
- No; but we can be Intermediate Host
- Regular segments; single lateral genital pore on alternating sides; scolex with 4 Acetabula, Rostellum with 2 rows of hooks
- None
- Droncit
Host: Canine
Size: 45-75 mm

- Trichuris vulpis
- Whipworm
- Canine (rarely cats)
- None
- Cecum and Large intestine
- Fecal Float
- Yes; ingestion of eggs
- Whip-shaped
- none, severe diarrhea, dehydration, bloody/mucosal stool, anemia
- Panacur
Host: Fish-Eating Mammals
Size: 2-12 cm

- Diphyllobothrium latum
- Broadfish Tapeworm
- Fish-Eating Mammals
- Fish
- Lumen in small intestine
- Fecal float; tapeworm crush
- Yes; ingestion of intermediate host
- Brown dot in center of each segment (uterus); Scolex has no suckers but Bothria (slit-like grooves)
- None
- Droncit
Host: Canine
Size: 40 um

- Taenia pisiformis or Taenia serialis
- Tapeworm
- Canine
- Rabbit
- Lumen in small intestine
- Fecal Float, Tapeworm Crush
- No; but we can be intermediate host
- Contains 6 hooks
- None
- Droncit
Host: Canine
Size:2-8 mm

- Echinococcus granulosus
- Tapeworm
- Canine
- Moose
- Lumen in small intestine
- Fecal Float, Tapeworm Crush
- Yes; ingestion of intermediate host
- 4-5 oblong segments, very pronounced Acetabula (looks like eyes)
- None
- Droncit
Host: Canine and Feline
Size: 2-8 mm

- Echinococcus multilocularis
- Tapeworm
- Canine/Feline
- Rodent
- Lumen in Small Intestine
- Fecal Float, Tapeworm Crush
- Yes; ingestion of Intermediate Host
- Eggs are identical to Taenia; Adults have 4-5 oblong segments; Very pronounced Acetabula (looks like eyes)
- None
- Droncit
Host: Canine
Size: 70-89 um

- Trichuris vulpis
- Whipworm
- Canine (rarely cats)
- None
- Cecum and Large intestine
- Fecal Float
- Yes; ingestion of eggs
- Perfectly smooth, like glass; symmetrical bipolar plugs
- none, severe diarrhea, dehydration, bloody/mucosal stool, anemia
- Panacur
Host: Canine, Feline, Human
Size: 40 um each, 125 um in capsule

- Dipylidium caninum
- Tapeworm
- Canine, Feline, Human
- Flea
- Lumen in small intestine
- Fecal float; tapeworm crush
- Yes; ingestion of intermediate host
- Very distinct egg packet containing up to 28 eggs; contains hooks
- None
- Droncit
Host: Canine and Feline
Size: 2-6 mm

- Alaria spp
- Intestinal fluke
- Canine and Feline
- frog
- Intestine
- Fecal float
- Yes; ingestion of intermediate host
- Leaf-like, flat; oral and ventral sucker; no anus
- none
- Tetracycline
Host: Canine and Feline
Size: 98-134 um

- Alaria spp
- Intestinal fluke
- Canine and Feline
- frog
- Intestine
- Fecal float
- Yes; ingestion of intermediate host
- Hermaphroditic; swirls and circles inside eggs; golden brown colour
- None
- Tetracyclines
Host: Feline
Size: 70 um

- Toxocara cati
- Roundworm
- Feline
- None
- Lungs, heart, liver, kidney, CNS
- Fecal Float
- Yes; ingestion of eggs
- Eggs have deeply pigmented cytoplasm
- Vomiting, coughing, lethargy, none
- Moxidextin
Host: Canine
Size: 10-18 cm

- Toxocara canis
- Roundworm
- Canine
- None
- Lungs, heart, liver, kidney, CNS
- Fecal Float
- Yes; ingestion of eggs
- Striated cervical alae (arrowhead)
- none, vomiting, coughing, lethargy
- Moxidextin
Host: Feline and Canine
Size: 90 um

- Toxascaris leonina
- Roundworm
- Feline and Canine
- None
- Lungs, liver, kidney, heart, CNS
- Fecal Float
- No
- Colourless, transparent cytoplasm
- vomiting, coughing, lethargy, none
- Moxidextin
Host: Feline
Size: 40 um

- Taenia taeniaeformis
- Taenia
- Feline
- Rodent
- Lumen in small intestine
- Fecal Float, Tapeworm Crush
- No, but we can be intermediate host
- Contains 6 hooks
- None
- Droncit
Host: Canine
Size: 90 um

- Toxocara canis
- Roundworm
- Canine
- None
- Lungs, heart, liver, kidney, central nervous system
- Fecal Float
- Yes; ingestion of eggs
- Eggs have deeply pigmented cytoplasm
- Vomiting, coughing, lethargy, none
- Moxidectin
Host: Fish-Eating Mammals
Size: 70 um

- Diphyllobothrium latum
- Broadfish Tapeworm
- Fish-Eating Mammals
- Fish
- Lumen in small intestine
- Fecal float; tapeworm crush
- Yes; ingestion of intermediate host
- faint operculum, small and pale yellow
- None
- Droncit
Host: Canine
Size: 40 um

- Echinococcus granulosus
- Hyatid Cyst Tapeworm
- Canine
- Moose
- Lumen in small intestine
- Fecal Float; Tapeworm crush
- Yes; via ingestion of intermediate host
- Eggs are identical to Taenia
- None
- Droncit
Host: Canine
Size: 65 um

- Ancylostoma caninum
- Hookworm
- Canine
- None
- Small intestine
- Fecal Float
- Yes; ingestion of eggs or cutaneous larval migration
- Oval in shape; colourless; morula (8-16 bunches inside)
- coughing, vomiting, diarrhea, constipation, dark tarry stool, or asymptomatic
- Ivermectin
Host: Canine and Feline
Size: 55-60 um

- Capillaria spp
- None
- Canine and Feline
- None
- (Depending on species) Liver, bladder, trachea & bronchi
- Fecal Float
- No
- Usually has asymmetrical bipolar plugs, striations in shell
- usually none, cirrhosis, slight cough
- Ivermectin
Host: Canine
Size: 10-20 mm

- Ancylostoma caninum
- Hookworm
- Canine
- None
- Small intestine
- Fecal Float
- Yes; ingestion of egg or cutaneous larval migration
- 3 pairs ventral teeth, anterior end bent slightly
- coughing, vomiting, diarrhea, constipation, dark tarry stool, asymptomatic
- Ivermectin
Host: Feline
Size: 40 um

- Echinococcus multilocularis
- Hyatid Cyst Tapeworm
- Feline
- Rodent
- Lumen of small intestine
- Fecal float; tapeworm crush
- Yes; ingestion of intermediate host
- Eggs are identical to Taenia; contains 6 hooks
- None
- Droncit
Host: Canine and Feline
Size: 2-10 cm

- Toxascaris leonina
- Roundworm
- Canine and Feline
- None
- Lungs, heart, liver, kidney, CNS
- Fecal Float
- No
- Long, narrow cervical alae (arrowhead)
- lethargy, none, vomiting, coughing
- Moxidextin
Host: Canine & Mink
Size: 71-84 um

- Dioctophyma renale
- Giant Kidney Worm
- Canine and Mink
- Fish
- Usually right kidney, sometimes left
- Urinalysis, Ultrasound, Surgery
- Yes; ingestion of intermediate host
- Very distinct lumpy shell, no cytoplasm, bipolar plugs
- Vague abdominal pain
- Surgical removal
Host: Canine and Mink
Size: 1-3 feet

- Dioctophyma renale
- Giant Kidney Worm
- Canine and Mink
- Fish
- Usually right kidney, sometimes left
- Urinalysis, Ultrasound, Surgery
- Yes; ingestion of intermediate host
- Huge, thick as a cigar, snake-like
- Vague abdominal pain
- Surgical removal
Host: Feline
Size: 6-12 cm

- Toxocara cati
- Roundworm
- Feline
- None
- Liver, lungs, heart, CNS, kidney
- Fecal Float
- Yes; ingestion of eggs
- Pronounced cervical alae (arrowhead)
- vomiting, lethargy, diarrhea, none
- Moxidextin
Host: Feline
Size: 10-100 cm
- Taenia taeniaeformis
- Taenia
- Feline
- Rodents
- Lumen in small intestine
- Fecal Float, Tapeworm Crush
- No but we can be intermediate host
- Regular segments; single lateral genital pore on alternating sides; scolex with 4 acetabula and rostellum with 2 rows of hooks
- None
- Droncit
Host: Canine and Feline
Size: 10-20 mm

- Uncinaria stenocephala
- Hookworm
- Canine and Feline
- None
- Small intestine
- Fecal Float
- No
- Plates instead of teeth, buccal cavity
- coughing, vomiting, diarrhea, constipation, dark tarry stool, asymptomatic
- Ivermectin
Host: Canine and Feline
Size: 75-118 um

- Paragonimus kellicotti
- Lung Fluke
- Canine and Feline
- Crayfish
- Lungs
- Fecal Float
- Yes; ingestion of intermediate host(s)
- Operculum with shoulders, thicker shell opposite to operculum
- None, coughing, dyspnea, pneumothorax
- Tetracyclines
Parasite on the Left
Host: Feline
Size: 30-40 um

- Isospora felis
- Coccidia
- Feline
- None
- Intestinal tract
- Fecal Float
- Species Specific
- Egg shaped, may be sporulated
- None, diarrhea, bloody stool
- S-125
Parasite on the Right
Host: Feline
Size: 20-27 um

- Isospora rivolta
- Coccidia
- Feline
- None
- Intestinal tract
- Fecal Float
- Species specific
- Round or oval shape, may be sporulated
- None, diarrhea, bloody stool
- S-125
Host: Canine
Size: 30-40 um

- Isospora canis
- Coccidia
- Canine
- None
- Intestinal tract
- Fecal float
- Species specific
- Egg shaped (identical to Isospora felis) may be sporulated
- None, diarrhea, bloody stool
- S-250
Host: Canine
Size: 20-27 um

- Isospora ohioensis
- Coccidia
- Canine
- None
- Intestinal tract
- Fecal float
- Species specific
- Round or oval shaped (identical to Isospora rivolta); may be sporulated
- None, diarrhea, bloody stool
- S-250
Host: Humans, Animals, Birds
Size: 10 um

- Giardia spp
- Beaver Fever
- Humans, Animals, Birds
- None
- Intestinal tract and feces
- Fecal float
- Species specific; ingestion of oocysts
- Contains 2-4 nuclei appears like eyes on a face
- Chronic diarrhea, weight loss
- Metronidazole
Host: Humans, Animals, Birds
Size: 15-21 um

- Giardia spp
- Beaver Fever
- Humans, animals, birds
- none
- intestinal tract
- fecal smear
- species specific; ingestion of trophozoite
- contains 2 nuclei looks like eyes on a ghost; 4 pairs of flagella; motile
- chronic diarrhea, weight loss
- Metronidazole
Host: Canine
Size: 284-340 um

- Dirofilaria immitis
- Heartworm
- Canine (rarely feline)
- Mosquito
- in the bloodstream
- blood smear
- yes; via infected mosquito
- stationary motility, straight tail
- none, fatigue, cough, respiratory distress, hepatic failure, death
- Steroids, antibiotics heartworm preventative
Host: Canine
Size: Up to 30 cm

- Dirofilaria immitis
- Heartworm
- Canine (rarely feline)
- Mosquito
- Pulmonary artery or lungs
- blood smear
- Yes; via infected mosquito
- look like angel hair pasta, males have a coiled tail
- none, cough, fatigue, respiratory distress, hepatic failure, death
- Steroids, antibiotic, heartworm preventative
Host: Canine
Size: 258-292 um

- Dipetalonema reconditum
- None
- Canine
- None
- Bloodstream
- Blood smear
- no
- progressive motility, curved tail when fixed, cephalic hook
- none
- none
Host: Canine
Size: 130-150 um

Could be any mite egg except demodex or cheyletiella
Host: Canine
Size: 200-400 um

- Sarcoptes scabiei
- Scabies or Mange
- Canine
- None
- Burrows into the skin of the pinnae, elbows and ventral abdomen
- Skin scraping or Skin biopsy
- Self limiting
- Characteristic dorsal spines, hind legs do not extend past the body, front legs are short and chubby, medium sized head
- intense pruritis, alopecia, papules, secondary infection due to trauma
- Ivermectin
Host: Feline
Size: Up to 300 um

- Notoedres cati
- Mange
- Feline
- None
- Burrows into the skin of the ears, face and feet
- skin scraping or skin biopsy
- self-limiting
- no dorsal spines, dorsal anus, short chubby back legs dont extend past the body, small head, females have very short front legs and males have mid sized ones
- intense pruritis, alopecia, papules, secondary infection due to trauma
- Ivermectin
Host: Canine and Feline
Size: 400 um

- Otodectes cynotis
- Ear Mite
- Canine and Feline
- None
- Surface dweller in the ear
- ear swab
- self-limiting
- tulip-shaped suckers on the end of pedicels, short unjointed pedicels, medium length front legs and short back legs that are visible past the body; small head
- Intense pruritis, thick discharge looks like coffee grounds, secondary infection
- Moxidectin and antibiotic for 2nd infection
What parasite does this sucker belong to?

Otodectes cynotis (Ear mite)
Host:Rabbit
Size: 400-750 um

- Psoroptes cuniculi
- Ear Canker
- Rabbit
- None
- Surface dweller in the ear
- Ear swab
- Self-limiting
- longest back legs of all mites, largest of all mites, pear shaped, matini-glass shaped suckers, long jonted pedicels
- intense pruritis, thick discharge like coffee grounds, secondary infection due to trauma
- Moxidectin, antibiotic for 2nd infection
Which parasite does this sucker belong to?

Psoroptes cuniculi (Ear Canker)
Host: Canine
Size: 400 um

- Demodex spp
- Mange
- Canine
- none
- Burrowed into the hair follicles of elbows, eye area, mouth and extremities
- Skin scraping or skin biopsy
- non-transmittable
- look like a cigar with 6-8 stumpy legs
- alopecia, 2nd infection
- Amitraz dip
Host: Canine
Size: 100 um

- Demodex spp
- Mange
- Canine
- none
- Burrowed into the hair follicle of the elbows, eye area, mouth and extremities
- skin scraping or skin biopsy
- non-transmittable
- look like pregnant bananas
- alopecia, 2nd infection
- Amitraz dip
Which parasite has an egg that looks like a “pregnant banana”?
Demodex spp
Which parasite has an egg that has “egg cutters” on it?
Cheyletiella spp
Which parasite is known as the Broadfish Tapeworm?
Diphyllobothrium latum
Which two types of tapeworms are identical to one another?
Taenia spp and Echinococcus spp
Host: canine, feline, rabbit
Size: 400 um

- Cheyletiella spp
- Walking Dandruff
- Canine, feline, rabbit
- none
- Surface dweller
- Scotch Tape Prep
- Yes; direct contact or environmental
- Huge head with 2 big claws called Palpi
- Scaly and oily coat, pruritis
- Fipronil
Host: Canine, feline, rabbit
Size: 234-245 um

- Cheyletiella spp
- Walking Dandruff
- Canine, feline, rabbit
- None
- Surface dweller
- Scotch tape prep
- yes; direct contact or environmental
- Egg cutters, folded up mite inside
- scaly and oily coat, pruritis
- Fipronil
Which parasite has plates instead of teeth?
Uncinaria stenocephala adult
What does it mean to say a parasite adult is whip shaped?
Anterior end is thin, posterior end is thick
Which family of parasites has Morula in the eggs?
Hookworms
Is Capillaria of any real concern?
No, it is only studied to differentiate from the dangerous trichuris vulpis
There is only one way to really treat the Giant Kidney Worm. What is it?
Surgical removal
Why would we do a Tapeworm crush?
To see the eggs in the segment and identify species of tapeworm
Which parasite uses the Moose as an intermediate host?
Echinococcus granulosus
Which parasite has Bothria (2 slit like grooves) instead of Acetebula (suckers)?
Diphyllobothrium latum
Which parasite has a distinct encapsulated egg that can hold up to 28 eggs inside?
Dipylidium caninum
Which parasite is known for having “swirls and circles” within the egg?
Alaria spp
What is the scientific name for the parasite commonly known as the Lung Fluke?
Paragonimus kellicotti
Some parasites do not have an “egg” stage. What is the stage called, instead?
Oocyst
Which parasite has a Trophozoite form that looks like a ghost?
Giardia spp
Isospora canis eggs are identical to what other species?
Isospora felis
Isospora rivolta eggs are identical to what other species
Isospora ohioensis
Which parasite is commonly known as Beaver Fever?
Giardia spp
Although it is not of concern, what parasite must be differentiated from Dirofilaria immitis (Heartworm)?
Dipetalonema reconditum
Mosquitos are important intermediate hosts of which parasite?
Dirofilaria immitis (heartworm)
Which parasite has uniform dorsal spines shaped like “v’s” on their back?
Sarcoptes scabiei
Which parasite is known for its massive head and Palpi (claws on mouthparts)?
Cheyletiella spp adults
Why would we perform a skin scraping instead of a scotch tape prep?
To find ectoparasites that burrow beneath the first layer of skin
Walking Dandruff is a common name for what parasite?
Cheyletiella spp
What is the largest mite? Provide scientific and common names
Psoroptes cuniculi “Ear Canker”
If a mite adult measures over 400um, what parasite must it be?
Psoroptes cuniculi “Ear Canker”
Amitraz dip can be used to treat which type of mite?
Demodex (Demodectic Mange)
Most mites are Self-limiting and technically not Zoonotic, with the exception of which one?
Cheyletiella spp