Nematodes - Spirurida - Filarioidea
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4 terms
Terms | Definitions |
|---|---|
 Setaria equina | Host: Equids IH: Mosquitoes Adult: long, slender, 12cm L LC: Indirect. Mff in bloodstream are ingested by mosquitoes. PPP: 8-10mo SOI: Adults-peritoneal cavity; Mff-blood; Larvae-eye Path: None CS: None unless nervous tissue involved Dx: Mff in blood smears. Adults in peritoneal cavity. |
| Onchocerca cervicalis | Host: Equids IH: Culicoides spp. Adults: Slender, 2-6cm L, lie tightly coiled in tissue nodules LC: Inoculation of L3 by Culicoides, arrival of parasite in final host results in host rxn. SOI: Nuchal ligament at withers. Mff in tissue spaces of skin, skin of umbilicus Path: Fibrous tissue, ligaments, and intermuscular ct CS: Pruritic dermatitis (aka microfilarial pityriasis, summer mange, equine dhobie itch, and plica polonica) Dx: Mff recovered in a saline incubation of skin biopsies, open purulent lesions ("fistulous withers") |
| Dirofilaria immitis (Heartworm) | Host: Canine, feline, zoonosis Adults: long, slender, 20-30cm L LC: Adults in pulmonary artery, female releases microfilariae in blood, mosquito ingests microfilariae with blood meal, microfilariae develop in mosquito to infective larvae, mosquito bites and transmits infective larvae. PPP: 7-9mo Adults survives for years, and can be patent for 5-7yr in dogs. SOI: Pulmonary artery, right ventricle, caudal vena cava Path: Severe heart and lung disease changes, endarteritis, congestive heart failure, caval syndrome CS: Dysfunction of lungs, heart, liver, & kidneys, cough, exercise intolerance, dyspnea, abnormal heart and lung sounds, hepatomegaly, syncope, as cities, death, hemoglo binemia, hemoglobinuria. Dx: radiology, angiography, u/s, serology, antigen tests -- ELISA & immunochromatographic test Tx: MCLs, prevention |
| Acanthocheilonema (Dipetalonema) reconditum | Host: Canines ID: Mff by progressive motion, few relative number, blunt head and buttonhook or curved tail. LC: Transmitted by fleas and lice. SOI: In subcutis, mff in blood and lymph Path: Occasional cutaneous ulceration CS: None Dx: Differentiate between this and D. immitis mff Tx: Not necessary |
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