1. Order Rhabditida (Threadworms) Flashcards
Common name of Strongyloides species
threadworms
Free-living
Opportunist
Facultative parasite
order Rhabditida (Threadworms)
Species in Stongyloididae
S ( scp wrp arf)
Strongyloides of reptiles
S (arf)
Genera of reptiles
[ RES ]
Cause granulomas
halicephalobus (micronema)
causes:
• dermatitis
• otitis externa
Rhabditis
only one of reptile threadworms genera that is of veterinary importance
Strongyloides
Which strongyloides may also hatch in large intestine?
S. stercoralis
esophagus of free-living Strongyloides
rhabditiform
esophagus of parasitic Strongyloides
inhabit the small intestines of their hosts that include mammals and birds
filariform
Two (2) possible development of life cycle of Strongyloides spp.
- Homogenic
- Heterogenic
What life cycle?
● occurs in unfavorable external conditions
● in presence of young animals
● exclusively parasitic form (filariform)
● adults only
● parthenogenetic females
Homogonic
What life cycle?
● in favorable external conditions
● in older animals
● involves a parasitic phase and free-living phase
Heterogonic
common route of Strongyloides in
• calves
• carnivores
Skin penetration (filariform larva)
What kind of infection occurs in
• piglet
• foal
• lamb
Transmammary infection
Which strongyloides develops L1 so fast to become L3 penetrating
1) rectum
2) peri-anal skin
Strongyloides stercoralis
Strongyloides autoinfection
S. stercoralis
Migration of strongyloides larva
Lungs
Autoinfective larva cause
pneumonia
Reptile threadworm common in lungs of
• frogs
• toads
low pathogenicity
Rhabdias
Reptile threadworm causing ULCERATION in the intestine
Strongyloides
