Horse nematodesOnline version equine nematodes RVC by Abbigail Boldero 1 large strongyles 2 S. vulgaris 3 Tridontophorus 4 cyathostominosis 5 parascaris equorum 6 Strongyloides 7 oxyuris equi strongylus vulagris, equinis, edentatus, triodontophorus ++ powerful and can suck and draw tissue into the mouth. penetrate blood capillaries, anemia strongylus vulagris affecting the large intestine - to strip the mucosa large buccal cavity and a leaf crown can cause prolific damage and inflammation tissue increase s.equinis - migrates to the liver and into adominal cavity. prepatent 9 months S.edentatus - migrates hepatic portal system, liver and migarates back. prepatent 11-12 months a large strongyle affects the large intestine and has multiple teeth burrow through the wall of the intetsine and up to the mesenteric artery towards aorta laying eggs in the aorta causes inflammation to the lining of the artery - verminous endarteris can form thrombus formation as it causes embolism. carried down branches of mesenteric wall - colic conflict between a small and a large strongyle affects the large intestine ingested as L3, migrates to the large colon. migrates into wall and matures into adult worm can cause large ulcers as plug feeder, more superficial damage small strongyle - under 1.5cm shallow buccal cavity ingest L3 larvae and arrest at whatever time of year ingested. after rest develop adult 8-12 weeks gut mucosa can become arrested for several years mild local inflammation, severe D+, weight loss mostly in young animals on permanant pasture encysted within the LI wall and emerge causing pepper pot intestine - small black marks eat the embryonated egg, into the SI and migrate to liver and lungs. coughed and swallowed the small intestines and foals mature into adults as they are coughed and swallowed. larvae damage - eosinophilic tracts in lungs and + nasal discharge adult worm damage - can cause blockage and risk infection sticky eggs + passed around hard infection to clear. passed in faeces as unembryonated egg prepatent period 10-12 weeks affects the small intestines and first parasite foals are exposeed too. aquire via feeding females are the only parasitic switches to a free living nematode in the spoil or mare milk can pass L3 stage larva. can build up in small intestine, severe enteritis, short and stunted villi, malabsorbtion causes d+ in foals pin worms found in the large intestine and rectum very common sharp and pointed at the end adult live in LI and rectum, lay eggs on perianal hair, fall to the ground and develop L3 not true blood feeders cause seat itch and rub rear end due to irritation and egg laying. emerge as L4 larvae and cause mucosal damage to intestine