Nematodes Flashcards
Where does toxocara canis live
In the small intestine, also sometimes in the lungs
Describe the physical appearance of Toxocara Canis
Spaghetti
What can happen to small breeds when they have a lot of Toxocara canis
Can cause obstruction
How do Toxocara canis inhabit the small intestine
They are not attached to the intestine but rather have an undulating swim
How long do Toxocara canis eggs lay dormant in the environment
2-5weeks
What are some key features of nematodes
Large-size variety, have a body cavity, have a digestive track including rectum, have reproductive organs
What type of eggs are Toxocara Cati
Oviparous
What type of eggs are ancylostoma caninum
Oviparous
What type of eggs are strongyloides westeri
Ovoviviparous
What type of eggs are capillaria
Oviparous
If a nematode produces larva it is said to be what
Lariparous
Describe the direct life cycle for nematodes
Hello three is infective for definitive host. L4 and L5 develop in definitive host. L5 is a young adult nematode. L6 is an adult that lays eggs
Describe the indirect lifecycle for nematode
In the intermediate host L1 L2 and L3 stages occur. Ingestion of the intermediate host where L4 and L5 develop in the definitive host
What are the symptoms of spirocerca lupi
Obstruction
What are the symptoms of physaloptera
Vomiting
Vomiting and feces of spirocerca and physaloptera look like what
Spaghetti
What is the PPP for Toxocara canis
21-35 days
What is the PPP for Toxocara Cati
8 weeks
What is the PPP for Toxocara leonina
8-10 weeks
What can ancylostoma, tubaeforme, braziliense and uncinaria cause due to feeding on blood
Anemia
What do strongyloides cause
Diarrhea.
How is strongyloides transmitted
Skin and milk.
what is special about strongyloides
there are no males and eggs hatch in intestine, L1 released in feces and L3 penetrates skin
How is trichuris vulpis transmitted
By ingestion
What is special about trichuris vulpis
Eggs are passed every 3 days and they are very heavy so they don’t float well
What is aelurostrongylus abstrusus
Feline lungworm that causes nodules in alveolar ducts. Especially in fiv/felv cars.
Where do aelurostrongylus hatch
In the lung and they are coughed up and swallowed. L1 is in feces.
What is the intermediate host for aelurostrongylus
Snails and slugs (L1-L3)
What are the paratenic hosts for aelurostrongylus
Rodents, birds, amphibians, reptiles
What is the baermann test used for
Diagnosing feline lugworm aelurostrongylus
What is filaroides olseri, hirthi and milksi
Canine lungworm. In trachea, bronchioles and lungs. Causes nodules and airway obstruction.
Describe the transmission of canine lungworm
Ingestion of L1 from Dam to puppies. No outside development required
Describe Capillaria aerophilia
In trachea and bronchi. Eggs are coughed up and swallowed
How is diotophyma renale transmitted
By infective larva in annelid. Diagnosed by urine sediment
What is dracunculus insignis
Guinea worm. From ingestion of intermediate host
What is thelazia californiensis
In conjunctival sac and lacrimal canal. From intermediate host, the face fly.
