Respiratory Parasites II Flashcards
(37 cards)
What is the definitive host of aelurostrongylus abstrusus
Cat
What is the intermediate host of aelurostrongylus abstrusus?
Many species of slug, snail
What is the pathogenesis of aelurostrongylus abstrusus?
- On ingestion L3’s penetrate the gut
- Adults sit in alveolar ducts and terminal bronchioles
- PPP 7-9 weeks
- Patent infections last for 4 months, but some worms can persist for years
- Often asymptomatic, can be coughing dyspnoea, nasal discharge
- Diagnosed by the presence of L1 in the faeces
What is the morphology of metastrongylus apri?
- Adult worms are large, slender and white
- Males =2.5cm, Females = 6cm
- larvated eggs are found in the faeces
What is the morphology of metastrongylus apri?
- The adult worms are large, slender and white
- Males = 2.5cm, Females = 6cm
- larvated eggs in the faeces
What are the clinical signs of metastrongylus apri?
- Heavy infections in young animals -> dyspnoea, nasal discharge
- Adult worms -> Bronchiolitis, bronchitis
- may be due to a secondary bacterial infection e.g staphylococcal
- Parasite may transmit porcine viruses
What is syngamus trachea also known as?
Gape worm
What is the oestrus ovis?
- Sheep nasal bot
- larvae in nasal passages
- light infection- nasal discharge and sneezing
- Heavy infection - unthriftiness and lack of coordination
What is echinococcus?
- Cestode
- Has worldwide distribution
What is the lifecycle of E. Multilocularis?
- Maintained in wildlife
- Final hosts- wild canids
- Intermediate hosts- rodents such as voles, muskrats, lemmings
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What is the epidemiology of E.multiolocularis?
- Human infection mainly in trappers and their families
- Eating vegetables or fruit contaminated with the faeces
What does E. granulosus disease look like in humans?
- Hydatid disease or cystic echinococcus
- Commonly affects liver and lungs
- 5-15 years incubation
- Single cyst grows larger over time, increased pressure in area of the cyst
What is the global prevalence of aelurostrongylus abstrusus?
Above a 5% prevalence
How does metastrongylus apri differ from other metastrongyles?
Has an earthworm as its intermediate host
What age of pigs is metastrongylus apri most present in?
aged 4-7 months
In what kind of system is metastrongylus apri not present in?
an indoor system with concrete floors
How may you diagnose metastrongylus apri?
faecal examination
What is gape worm?
An adult worm found in the trachea of chickens, turkeys and gamebirds
What are the main clinical signs of gape worm?
- Respiratory distress
- Suffocation
- head shaking
- coughing
- choking
How may you prevent syngamus trachea?
- Worming strategy
- Rotational grazing
- avoid areas with wild pheasants
What anthelmintic is used for syngamus trachea?
Flubendazole
What causes oestrus ovis in sheep?
sheep nasal bots
What are the clinical signs of oestrus ovis?
- Light infections cause nasal discharge and sneezing
- Heavier infections cause unthriftiness and lack of coordination
What are the two main types of echinococcus?
- Echinococcus granulosus
- E. multilocularis
