Helminth Parasites

NEMATODES (Roundworm)

Name	Synonyms	Host	Site	Size
Haemonchus species	Wire worm, Barber’s pole worm, Red stomach worm	Ruminants	Abomasum	1-3 cm
Ostertagia species		Ruminants	Abomasum	1 cm
Trichostrongylus	Stomach hair worm	Ruminants, horse, pig, fowl	Small intestine Except T. axei (SI and also in abomasum) and T. tenuis (SI and also in caeca of fowl)	5-10 mm
Cooperia species		Ruminants	Small intestine	1 cm
Nematodirus species		Ruminants	Small intestine	1-2 cm
Ancylostoma species	Hookworm, Blood feeder, Haemophagus	Dog, cat, man	Small intestine	1-2 cm
Bunostomum species		Ruminants	Small intestine	1-2 cm
Strongylus species		Equines (Horses and Donkey)	Caecum & colon	1.5-5 cm
Chabertia species		Ruminants	Colon	1.5-2 cm
Oesophagostomum species		Ruminants, pig	Caecum, colon	1-2 cm
Trichuris species	Whip worm	Ruminants, pig, dog	Caecum	4-6 cm
Ascaris lumbricoides	Giant roundworm, Human roundworm	Human	Small intestine	up to 10 cm
Neoascaris vitulorum		Cattle, Buffalo	Small intestine	up to 30 cm
Ascaridia galli	Chicken roundworm	Poultry	Small intestine	up to 12 cm
Ascaris suum	Pig roundworm	Pig	Small intestine	up to 40 cm
Capillaria species	Hairworms	Poultry	Crop, esophagus, small intestine, large intestine	3 cm
Heterakis species	Caecal worm	Poultry	Caecum	up to 1.5 cm
Oxyuris equi	Horse pinworm	Horse and Donkey	Large intestine	up to 10 cm
Parascaris equorum	Horse roundworm	Horses and Donkey	Small intestine	up to 40 cm
Spirocera lupi	Esophageal worm	Dogs	Esophagus and stomach	4-7 cm
Toxascaris leonine		Dogs, Cats	Small intestine	5-10 cm
Toxocara canis	Dog roundworm	Dogs	Small intestine	up to 10 cm
Toxocara cati	Feline roundworm	Cats	Small intestine	up to 10 cm
Dictyocaulus species	Lung worm	Ruminants, Horses	Trachea, bronchi, bronchioles	8 cm
Metastrongylus species	Pig lungworm	Pigs	Trachea, bronchi, bronchioles	3-6 cm
Syngamus trachea	Gapeworm	Poultry	Trachea, bronchi	0.5-2 cm
Capillaria species	Hair worms	Dogs, Cats	Bladder, Lungs, Stomach, Liver	3 cm
Dioctophyma renale	Kidney worm	Dogs	Kidney	20-40 cm
Dirofilaria species	Heart worm	Dogs, Cats	Pulmonary artery	20-30 cm
Oxyspirura species	Fowl eye worm	Poultry	Eye
Trichinella species		Pigs, Dogs, Cats	Muscles, small intestine	1.4-1.6 mm
Thelazia species	Eye worm	Mammals including human, Birds	Eyelids, lacrimal ducts and glands, third eyelid	Up to 20 mm

TREMATODES (Flatworm)

Name	Synonyms	Final Host	Intermediate Host	Site	Size
Alaria species		Dogs and cats	Snail	Small intestine	0.5-61.5 mm
Dicrocoelium species	Lancet liver fluke flukes	Ruminants	First: Snail Second: Ant	Bile ducts and gall bladder	6-10 mm
Fasciola hepatica	Common liver fluke	Ruminants (Also in pig, horse, man)	Snail (Lymnea)	Biliary ducts, gall bladder, liver	30 mm ×13 mm
Fasciola gigantica	Tropical liver fluke	Ruminants (Also in pig, horse, man)	Snail (Lymnea)	Biliary ducts, gall bladder, liver	75 mm×12 mm
Fascioloides magna	Giant liver fluke	Ruminants	Snail (Lymnea)	Liver	4-10 cm×2-3.5 cm
Paramphistomum species	Stomach or rumen flukes	Ruminants	Snail (Planorbis)	Stomach (Rumen), small intestine	1 cm
Schistosoma species	Blood flukes	Ruminants, cats, horses	Snail	Blood vessels	0.7-2 cm
Prosthogonimus species	Oviduct flukes	Poultry	Snail	Oviduct, Bursa of Fabricius	0.75-1.2 cm

CESTODES (Tapeworm)

Name	Synonyms	Final Host	Intermediate Host	Site	Size
Anaplocephala species		Horses and donkeys	Oribatid mites	Small and large intestine	80 cm
Taenia saginata (Cysticercus bovis)	Beef measles	Human (Small intestine)	Cattle and Buffalo	Muscles	5-15 meter
Taenia solium (Cysticercus cellulosae) - cause Neurocysticercosis in human	Pork tapeworm, Pork measles	Human (Small intestine)	Pigs, humans	Muscles	5-15 meter
Taenia ovis (Cysticercus ovis)	Sheep measles	Dogs (Small intestine)	Sheep, Goats	Heart and muscles	5 meter
Taenia hydatigena (Cysticercus tenuicollis)	False hydatid worm	Dogs  (Small intestine)	Sheep, Goats, Pigs, Horse and Donkeys	Abdominal organs	5 meter
Taenia multiceps (Coenurus cerebralis)- caused disease called Gid/Staggers		Dogs  (Small intestine)	Sheep, Goat, Cattle	Brain, Spinal cord	1 meter
Davainea proglottina	Minute tapeworm	Poultry	Insects (Such as Ants)	Small intestine	1-4 mm
Dipyllidium caninum	Flea tapeworm	Dogs and Cats	Fleas	Small intestine	10-30 cm
Echinococcus granulosus- cause Hydatidosis	Hydatid worm	Dogs (Small intestine)	Ruminants, Pigs, Horses, Donkey	Liver and lungs	3-6 mm
Echinococcus multilocularis	Fox tapeworm	Dogs and Cats	Rodents	Small intestine	3-6 mm
Moniezia species	Sheep tapeworm	Ruminants	Oribatid mites	Small intestine	6 meter
Raillietina species		Poultry	Insects (Such as Ants)	Small intestine	25 cm