Internal Parasites of Livestock

Jennifer Edmiston

Per2

4/07/02

Roundworm• There are two types of common roundworm: Brown and Twisted.• How do cattle become infected with roundworms?

Infection may be spread to susceptible animals from one grazing season to another in one.

• How do these parasites damage the host?Several species of stomach worms commonly occur together in cattle and have similar effects. Large numbers of these worms may cause anemia, poor growth, and occasionally, death. The small stomach worm (T. axei) is smaller than the other worms and sucks less blood than an equal number of the other species and so has less, effect on the parasitized host.

Roundworm

Strongyle

• They normally inhabit the small intestine.• They have a large selection of hosts but they

prefer young ones. After the age of five or four they seems to become immune to the parasite.

• They have hatched in the poo of the infected animals and they hatch and climb up on a blade of grass and are eaten by by an animal. They go into the stomach and pass into the intestine and they they attack the wall and feed off of blood.

• They leave scar tissue, they can give colic, and chronic infestations can cause a state of unthriftiness and even death in some animals.

ASCARIDS

Ascarid• These parasites normally like cattle,

sheep, hogs, and horses.• They are eaten and pass into the lungs,

they are coughed up and swallowed again and they live in the intestine. They can grown to be 15 inches.

• Affected animals may get pneumonia weight loss, and colic.

• They can be controlled by pasture rotation and worming programs.

STRONGYLES•

Pinworms• They are mostly in horses, but can be found

in all livestock and humans.• The female lays eggs around the anus of the

animal, the eggs drop off and get into the water supply. They are eaten and they pass into the colon, and they live there.

• The damage from the worm is minor, because they live off of the feces from the animal.

• They will cause the animal to rub its tail and white, scaly deposits are noticeable.

• It can be controlled with proper sanitation.

Pinworms

• pinworm

Habronema• They live in horses only.• They do little damage once the worm

has grown, they live in the horse fly and the horses eat the fly and they are now infected with the parasite.

• Summer sores may develop if the maggots aren’t laid on the lips of the animal but instead in a open sore.

• They best control is regular worming.

Habronemas

•Summer sore

Lungworms• They affect all types of livestock.• The eggs are laid in the lungs where they are coughed up and swallowed, they exit the body and hatch in the feces, they are ingested again and they burrow in the lungs through the lymph nodes. In the lungs they mature into the adult stage.

• They can cause blockage of the lungs and of the windpipe and bronchi.

Lungworms• Lung worm damage

Broad Tapeworm

• They are found in all livestock and also in humans.

• They can get to a size of 10 feet. They live in the small intestines. In females, segments break off and pass out of the body in the feces. They hatch and move into the intestines and there they feed off of foodstuff.

• The major tell tale sign is weight loss and emaciation.

Broad Tapeworms

borad tapworm.jpg

Beef or Pork Tapeworm

• They only live in the animals meat until a human comes and eats it, then it lives permanently inside of a human.

• In humans it can grow to be a length of 25 feet. The beef of pork with the tapeworm is called measly beef or pork. The damage to the animal, but they 2 are in competition for foodstuff.

• Because humans are the main host, the only to kill the parasite is to keep the infected beef away from human consumption.

Beef or Pork Tape worms

•

Liver Fluke• The liver fluke does most of its damage to goats,

sheep, cattle, and humans. It also affects young animals.

• The adult lives in the bile ducts of the liver, where it lays it eggs and they are passed out in the feces. The liver fluke has to live in a snail before it can pass into an animal. The animal lives off of the blood in the liver and begins producing eggs 3 months after entering the liver.

• Control of the animal is very hard because you have to get rid of snails. And anywhere you have water most likely you will have snails.

Liver Fluke•

Animals that get these Parasites

My Sources

• Google.com• I also used the packet a lot, all my

information came from the packet.