Nematodes - Rhabditida - Rhabditoidea
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4 terms
Terms | Definitions |
|---|---|
 Strongyloides westeri (Threadworm) | Host: Equids Adult: 1cm, esophagus 1/3rd body length Eggs: thin-shelled, larvated (L1), 30-40um LC: Direct (L3); Parasitic (homogonic) & Free-living (heterogonic); PPP: 10-14d SOI: Small Intestine, larvae somatic tissues; Percutaneous, per os, transmammary Path Larvae: Erythematous RxN CS Larvae: Urticaria CS Adult: Diarrhea Dx: Fecal float, foals 5mo+ age Tx: Ivermectin |
| Strongyloides stercoralis (Threadworm) | Host: K9, Foxes, Feline, Zoonotic Adult: 1cm L, esophagus 1/3rd body length Eggs: thin-shelled, larvated (L1), 30-40um LC: Direct (L3); Parasitic (homogonic) & Free-living (heterogonic); PPP: 10-14d SOI: Small Intestine, larvae in skin; Percutaneous, per os, transmammary, transplacental Path Larvae: Erythematous RxN CS: Young animals - diarrhea, anorexia, dullness, weight loss, urticaria Dx: L1 & eggs w/L1 fecal float, baermann Tx: anthelmintics |
| Strongyloides papillosus (Threadworm) | Host: Sheep and goats Adult: 1cm slender, hair-like, long esophagus, cottonballs in clumps Egg: egg with L1 30 x 40um LC: Direct. Parasitic (homogonic) & free-living (heterogonic); arrested larvae, transmision is percutaneous, per os, prenatal or transmammary infection; L3 infective PPP: 10-14d SOI: adults in SI PATH: skin penetration by larvae causes an erythematous reaction LARVAE CS: urticaria ADULTS CS: diarrhea Dx: larvated eggs in fecal float or with Baermann |
| Strongyloides ransomi (Pig Threadworm) | Host: Swine Adults: slender, hair-like, 1cm, long esophagus Egg: embryonated, (oval, 30-40um) LC:Direct. Parasitic (homogonic) & free-living (heterogonic); arrested larvae, transmision is percutaneous, per os, prenatal or transmammary infection; L3 infective PPP: 10-14d SOI: SI PATH/CS: L3 skin penetration leads to erythema, large numbers in intestine cause inflammation with erosion of epithelium, neonatal pigs may die before eggs excreted with feces, infection results in strong immunity in older animals hence not clinically affected. Dx: larvated eggs and hatched L1 in feces by Baermann technique Tx: prevent conditions that favor development (high temp/humidity/poor hygiene), prevent accumulation of larvae, benzimidazoles and MCLs, sow 4-16 d pre-farrowing |
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