Draschia megastoma Flashcards
What order do these groups belong to?
Spirurida
Which parasitic group do they belong to?
Nematodes
What is the common name for both?
Stomach nematodes
Who are the final hosts?
All equid species
Who are the intermediate hosts?
Musca spp. fly or stomoxys calcitrans
Where is the site of infection?
Stomach; D. Megastoma creates nodules
What are the characteristics of adults?
13-25mm long
What are the characteristic of the egg?
thin shelled, contain L1 (40x8), very elongated & difficult to see
What is the lifecycle?
Adults release eggs in feces -> larval stages of fly in feces consume 1st stage of larvae of nematodes -> larvae develops with the fly -> develop to L3 -> adult fly feeding on secretions of face -> ingested by DH
If L3 is located on the skin, “wrong place at the wrong time”
What are clinical signs caused by adults? Larvae?
Adults: nodules in stomach (near Margo plicatus) -> gastritis.
Larvae: “SUMMER SORES”
Cutaneous habronemiasis/cutaneous draschiasis; grandular conjuctivitis
Extreme pruritis, caseocalcareous nodules
What is the diagnosis?
Recovery of eggs in feces difficult; larvae in scarping of skin lesions.
What is the treatment & prevention?
Control flies, MCLs to kill L3, local applications to lesions, surgical removal
Do these species depend on seasonality and prevalence?
Yes (because of flies)
