Nematode Parasites Flashcards
Ancylostoma caninum egg appearance
Thin shells & multiple cell clusters
Ancylostoma caninum transmission
Perinatal
Ancylostoma caninum diagnosed
Fecal Flotation
Cutaneous Larva Migrans is?
Skin inflammation caused by a migrating roundworm larva
Cutaneous Larva Migrans zoonotic?
Yes
Cutaneous Larva Migrans diagnosis
Syndrome & history of exposure
Toxocara canis egg appearance
Round with a thick pitted shell
Toxocara canis lifecycle
Visceral migration occurs in pups less than 3 months old.
Dormancy occurs in older dogs
Mobilization to the uterus is seen in the last trimester of pregnancy
Toxocara canis definitive host
Dogs
Toxocara canis transmission
Transplacental & Transmammary
Toxocara canis diagnosis
Eggs in feces - sometimes adult worms
adult worms in vomit
Toxocara canis is common in?
Puppies & Kitties
Visceral Larva Migrans is?
Damage to the body’s internal organs that is caused by a migrating roundworm larva
Visceral Larva Migrans causative parasites?
Toxocara canis
Toxocara cati
Baylisascaris procyonis
Visceral Larva Migrans zoonotic?
Yes
Visceral Larva Migrans transmission
Ingestion of infective worm eggs generally caused by ingesting infected fecal matter
Visceral Larva Migrans incubation period?
Weeks to months
Visceral Larva Migrans Diagnosis?
CBC
Serology
ELISA Test
Trichuris vulpis eggs appearance
Barrel shaped with transparent plugs (operculum) at each end
Trichuris vulpis diagnosis
Eggs in the feces
Dirofilaria immitis egg appearance
No eggs, microscopic microfilaria produced
Dirofilaria immitis life cycle
Adults live in the right ventricle of the heart & the pulmonary artery
Dirofilaria immitis clinical disease is observed?
9-10 months after dog is infected
Dirofilaria immitis diagnosis
Microfilaria in blood
- Blood smear
- Microhematocrit Tube
- Knitts Test
- Filter Test
- Antibody Test
Strongylus vulgaris egg appearance
Oval with a thin shell & multiple cell clusters in the center
Strongylus vulgaris diagnosis
Eggs & larva in feces
Larva can be found in the feces using the Baermann Technique
Strongyloidea refers to?
A superfamily of parasites that produce strongyle type eggs
Strongylus vulgaris adults live where in the body?
Adults lives in the colon & cecum
Larva migrate through walls of the cranial mesenteric artery leading to pain, aneurysm, & infarction
Strongylus vulgaris clinical signs
Unthriftiness
Anemia
Colic
Strongylus vulgaris prevention
Feed horses off the ground
Dirofilaria immitis intermediate host
Mosquito
Strongylus vulgaris control
Total Egg counts on the pasture to know if you need to rotate the animals out of the pasture
Oxyuris equi egg appearance
Eggs are oval with a transparent plug at one pole
Oxyuris equi definitive host?
Horses
Oxyuris equi diagnosis
Eggs in feces & around perianal area
- Use scotch tape around the perianal area as the nematodes the leave anus generally at night to lay their eggs around the anal opening in the fur you will trap them in the tape
- Fecal Float
Ostertagia ostertagi egg appearance
Oval with a think shell multiple cell clusters in the center
*Typical Trichostrongyles type egg
Ostertagia ostertagi is diagnosed how?
Eggs in feces - Fecal Float
Ostertagia ostertagi control/prevention options?
McMaster Egg Count to check pasture parasite load - pasture rotation
Trichostrongyloidea refers to?
A superfamily of parasites that produce Trichostrongyle-type eggs
Ostertagia ostertagi clinical signs/symptoms
Weightloss & Diarrhea
Trichinella spiralis & Trichinella spp causes what disease?
Trichinosis
Trichinosis refers to?
A parasitic disease acquired by eating inadequately cooked infected meat
Trichinosis incubation period?
5-15 days
Trichinosis is transmitted by?
Ingestion of raw or undercooked meat containing infected larva
Trichinosis is diagnosed how?
Syndrome
Serology
Muscle Biospy
Trichinosis control & prevention tips?
Cook meat well
Freeze meat for at least 20 days
Cook garbage prior to feeding it to swine
Control rodents in swine rearing operations
