Nematode, Cestode, & Trematode Study Charts

Toxocara canis/cati ova (low power)

Toxocara canis/cati ova (high power)

Toxocara canis/cati adult gross specimen

Toxocara canis/cati adult gross specimen

(slide for size comparison)

Toxascaris leonina ova

Toxascaris leonina adult

(not recommended to handle gross specimens without gloves)

Ascaris suum ova

Ascaris suum adult

Ascaris suum gross specimen

Strongyloides larva in feces (Threadworm)

Strongyloides larvated ova

(if did not hatch at typical time)

Ancylostoma ova (typical strongyle ova)

Ancylostoma adult (with teeth) (Hookworm)

Ancylostoma adult infection (1-2cm long)

Strongylus vulgaris ova (typical strongyle ova)

Strongylus vulgaris adults 

Haemonchus contortus adult (Barberpole worm)

Bottle jaw pathogenesis caused by Haemonchus contortus

Trichuris ova (Whipworm)

Trichuris adult 

Oxyuris equi ova being laid around the horse anus by adult

Oxyuris equi ova (Horse pinworm)

Oxyuris equi adult

Dirofilaria immitis microfilaria (larva- L1) in blood (Heartworm)

Dirofilaria immitis adult (pulmonary artery & right ventricle of heart)

Dirofilaria immitis adults (male and female)

Oesophagostomum ova (typical strongyle ova)

Oesophagostomum adult (Nodular worm)

Nodules along the GI tract from nodular worm infection

Ostertagia ostertagi ova (typical strongyle ova)

Ostertagia ostertagi adults (Brown stomach worm)

Nematodirus ova (low power)

Nematodirus ova (high power)

Nematodirus adult

Dictyocaulus larva (Lungworm of ruminants and equine)

Dictyocaulus adult

Ollulanus tricuspis

Aelurostrongylus abstrusus larva (Cat lungworm)

Filaroides hirthi larva (Dog lungworm)

Filaroides hirthi (larva laid in nodules in lungs)

Trichinella spiralis larva in nurse cells in muscle tissue (Trichina worm)

Pearsonema plica/feliscati ova (Found in urine sample)

Parascaris equorum ova

Parascaris equorum adult (Large roundworm of horses)

Parascaris equorum gross specimen (in jar with blue cap)

Metastrongylus ova (Lungworm of pigs)

Parelaphostrongylus tenuis adult in deer brain (Meningeal worm)

Parelaphostrongylus tenuis IH (snails or slugs)

Dipylidium caninum ova

Dipylidium caninum adult

Taenia taeniaeformis ova (typical taeniid egg)

Taenia taeniaeformis adult (proglottids)

Taenia saginata ova (typical taeniid egg)

Taenia saginata adult (unarmed scolex)

Taenia solium ova (typical taeniid egg)

Taenia solium adult (armed scolex)

Taenia solium adult (full body with proglottids)

Echinococcus granulosus ova (typical taeniid egg)

Echinococcus granulosus adult 

Echinococcus granulosus hydatid cysts (larval stage)

Inside a hydatid cyst (protoscolices prepared to infect host upon ingestion of cyst)-- a.k.a. hydatid sand

Moniezia ova

Moniezia adult

 Moniezia gross specimen

Anoplocephala ova

Anoplocephala perfoliata adult

Anoplocephala perfoliata adults cluster in horse's posterior small intestine

Hymenolepis diminuta ova

Hymenolepis diminuta adult

Hymenolepis diminuta adult

Diphyllobothrium latum adult

Spirometra mansonoides ova (low power)

 Spirometra mansonoides ova (high power)

Spirometra mansonoides adult

Spirometra mansonoides spargana (This picture depicts ocular sparganosis in a human)

Paragonimus kellicotti ova

Paragonimus kellicotti adult

Fasciola hepatica ova

Fasciola hepatica adult

Fasciola hepatica gross specimen mount

Fasciola hepatica gross specimen

Alaria ova

Alaria adult

Alaria adult in host intestine

Heterobilharzia americanum ova

Heterobilharzia americanum adult

Dicrocoelium dendriticum ova (low power)

 Dicrocoelium dendriticum ova (high power)

Dicrocoelium dendriticum adult

Dicrocoelium dendriticum adult micrograph picture