Effects Of Diseases Pests And Parasites

Aperçu

A dead animal is the loss every farmer notices. It is rarely the biggest one. Long before a disease, pest or parasite kills anything, it has already been quietly stealing growth, milk, eggs and fertility from every animal it touches, and it keeps stealing from the survivors long after the outbreak has passed. A herd that never loses a single animal to worms can still lose a season's profit to them.

In this lesson you will learn exactly what disease costs a farm in production terms, how pests and parasites add costs of their own on top of that, and how a stockman turns these separate effects into one naira figure that tells the true size of the problem. This is the bridge topic for the whole Animal Health section: once you can weigh the damage, every topic that follows on prevention and control will make sense as the way to avoid paying for it.

Objectifs

  1. Explain the effects of diseases on farm animal production
  2. Explain the effects of pests on farm animal production
  3. Explain the effects of parasites on farm animal production
  4. State the economic losses caused by diseases, pests and parasites
  5. Suggest measures to reduce losses from diseases, pests and parasites

Note de cours

A poultry farmer near Ibadan loses eight birds out of two hundred to an outbreak and treats it as an eight bird problem. It is not. The other one hundred and ninety two birds ate feed and laid fewer eggs throughout the outbreak, and some never recover their old rate. Disease, pests and parasites all cost a farm far more than the animals they kill, and a stockman who cannot see the hidden cost will always under-price prevention.

Évaluation de la leçon

Félicitations, vous avez terminé la leçon sur Effects Of Diseases Pests And Parasites. Maintenant que vous avez exploré le concepts et idées clés, il est temps de mettre vos connaissances à lépreuve. Cette section propose une variété de pratiques des questions conçues pour renforcer votre compréhension et vous aider à évaluer votre compréhension de la matière.

Vous rencontrerez un mélange de types de questions, y compris des questions à choix multiple, des questions à réponse courte et des questions de rédaction. Chaque question est soigneusement conçue pour évaluer différents aspects de vos connaissances et de vos compétences en pensée critique.

Utilisez cette section d'évaluation comme une occasion de renforcer votre compréhension du sujet et d'identifier les domaines où vous pourriez avoir besoin d'étudier davantage. Ne soyez pas découragé par les défis que vous rencontrez ; considérez-les plutôt comme des opportunités de croissance et d'amélioration.

  1. Which of the following is an effect of disease on farm animal production but NOT typically an effect of a pest? A. Damage to stored feed B. Carcass condemnation at the abattoir C. Gnawing of feed bags D. Contamination of feed with droppings Answer: B
  2. An organism that lives in or on a host animal and feeds at the host's expense is best described as a: A. Pest B. Parasite C. Pathogen only D. Predator Answer: B
  3. Heavy tick infestation most directly causes which of the following in cattle? A. Improved feed conversion B. Blood loss and anaemia C. Increased milk fat content D. Faster weight gain Answer: B
  4. The rejection of a slaughtered animal's meat by a meat inspector because of disease lesions is called: A. Carcass grading B. Carcass condemnation C. Carcass curing D. Carcass dressing Answer: B
  5. Which statement best explains why disease losses in survivors can exceed the value of animals that die in an outbreak? A. Dead animals are always replaced free of charge B. Surviving animals eat less feed after an outbreak C. Reduced growth, yield and fertility affect the whole surviving group, not just the few that died D. Veterinary costs are only charged for dead animals Answer: C

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