Wednesday, 15 September 2021 11:20

Animals - Class 7 Science Revision Notes

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  • This is an organism that fully depends on another organism for its survival.
  • They either live on the body of the animal(External parasites) or inside the bodies on the animals(Internal parasites).

Examples of External Parasites(Ecto-parasites).

  • Tick- Cattle, Sheep, Goats
  • Mites- Oigs, Goats, Sheep, Poulty, Camel, Horses, Cattle, Rabbits.
  • Flea- Pigs, Poulty, Rabbits.
  • Louse-Poulty, Pigs, Sheep, Cattle, Horses
  • Tsetse fly- All domestic animals

Examples of Internal Parasites(Endo-parasites).

  • Liverfluke- Attacks liver and lungs of cattle, sheep, goats and pigs.
  • Tapeworms- Attacks liver and small intestines of cattle, sheep, goats and pigs.
  • Roundworms- Attacks small intestines,liver and lungs of cattle, sheep, goat, poultry and fish.
  • Hookworms-Attacks the small intestine ofsheep and oats.
  • Lungworms- Attacks the lungs,brain and stomach of cattle, sheep, goats and pigs

Effects of Parasites on Animals.

  1. Leads to poor health of the animal .
  2. Causes anemia as they sucks a lot of blood from the animal's body.
  3. Causes irritation on the body of thee animal.
  4. Leads to poor quality of the products.

Methods of Controlling Livestock Parasites.

  • Rotational grazing-Both
  • Dipping- External parasites.
  • Spraying-External parasites.
  • Deworming- Internal parasites;Involves drenching and dosing.
  • Hand picking - External parasite.

Methods of Controlling Human Intestinal Worms.

  • Proper sanitation.
  • Proper washing of food that are eaten raw.
  • Proper cooking.
  • Regular deworming.

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