Lungworms Flashcards
What is Dictyocaulus viviparus? What species does it affect? Where in the lungs is it? What disease is it associated with?
Bovine lungworm, associated with parasitic bronchitis “husk”. Affects trachea and large bronchi.
What is the lifecycle of most Dictyocaulus species affecting the lungs?
Embryonated eggs in lungs, coughed up and swallowed, L1 in fresh faeces (eggs in equine), L1-L3 in dungpat, ingestion of infective larvae, migrate via lymphatics to lungs, mature into adults.
What are the 2 main ways of controlling D. viviparus?
1) Vaccine - “Bovilis Huskvac”.
2) Strategic - Ivermectin 3, 8, 13 weeks post turnout.
What are the three Dictyocaulus species associated with respiratory system? What is their hosts?
D. viviparus (bovine), D. filaria (ovine), D. arnfieldi (horses)
What are the three important lungworms in sheep?
D. filaria, Muellerius, Protostrongylus spp.
How do the ovine lung worms Muellerius and Protostrongylus spp.spread?
IH is the snail/slug. M = adults in parenchyma, alveoli. P = Small bronchioles.
What is D. arnfieldi? Why are donkey’s important?
Equine lungworm. Adults in smaller bronchi. Donkey’s are the main source of infection, as they can remain infected for years.
What is the most important Porcine lungworm? What is it’s IH? Why is it significant?
Metastrongylus spp are very pathogenic. They only affect outdoor pigs as their IH = earthworm.
What are the two important canine lungworms?
Angiostrongylus vasorum, Filaroides osleri.
What is the lifecycle of A. vasorum? What is the IH?
Adults release eggs into PA, larvae in lungs hatch, Larvae coughed and swallowed, larvae infect slug, slug eaten by dog/fox
Where would you find A. vasorum in dogs?
Right ventricle and pulmonary artery.
What is Filaroides osleri? How is it spread? How do you treat it?
Canine lungworm. Bitch spreads it to puppies in sputum (L1). Adults in fibrous nodules in trachea. Treat with Fenbendazole (50mg/kg for 7d)
What is Aeulurostrongylus abstrusus? What is its lifecycle?
Feline lungworm. IH = molusc. Usually asymptomatic but can cause problems in immunocompromised cat.
