Date: 27th of February- 17th of March 2023
Week: 8-10
Subject: Agricultural Science
Topic: Animal Diseases
Duration:45 minutes
Teaching Aid: A chart
Reference Book: WABP Junior secondary Agriculture for Nigerian School 1 by Anthony Youdeowei et al
Behavioural Objectives: By the end of this topic, students should be able to
Presentation
Step 1: Teacher revises last topic
Step 2: Teacher introduces and explains new topic
Step 3: Teacher writes note on the board
Step 4: Teacher evaluates students
Step 5: Teacher marks students' notes and give assignment
Previous knowledge: Students have been taught care of livestock
Content
DISEASES OF FARM ANIMALS
Meaning of Diseases
A disease is nay abnormality in health. It is a deviation from the normal functioning of any part of the animal body. Disease may manifest in form of infection, irritation or unfavourable condition. Hence, a diseased animal cannot perform the normal body processes. Disease results in ill health which may result in death.
A sick or diseased animal will show some or all the following signs.
Disease could be categorized into two. These are:-
Animals can contact disease through the following:
Common Disease of Farm Animals
The common disease of farm animals include the following
Sheep and goats
Pigs (swine)
Rabbits
Poultry
Table showing common disease of farm animal
Name of disease | Causal organism (agent) | Animal affected | Symptoms | Mode of transmission | Body area affected | Effects | Treatments | Prevention on and control measures |
Foot and mouth | Virus | Cattle | i. High fever ii. Loss of appetite iii. Blisters or sores on the muzzle (lips), tongue, cheek, udder and feet iv. Weakness and lameness v. Excessive salivation and foaming | By contact with infected animals, contaminated feed. | Legs | Serious loss of animals (death) | No effective treatment | i. Vaccination to prevent the disease ii. Isolation of diseased animals iii. Slaughter and bury infected animals |
Rinderpest or cattle plague | Virus | Cattle can also affect sheep, goat and pigs | i. High fever (rise in temperature ii. Loss of appetite iii. Blood stained diarrhea iv. Difficulty in breathing v. Grinding | i. Eating contaminated food. ii. Contact with infected animals | Entire body | High rate of animals | No treatment | i. Vaccination to prevent the disease ii. Isolation of infected animals iii. Quarantine iv. Kill and bury diseased animals |
COMMON DISEASES OF FARM ANIMALS
Name of disease | Causal organism (agent) | Animal affected | Symptoms | Mode of transmission | Body area affected | Effects | Treatments | Prevention on and control measures |
Anthrax | Bacteria | Ruminants (cattle, sheep and goat) | i. High fever ii. Convulsion iii. Increased breathing rate iv. Black or blood stained discharge from mouth, eyes, nostrils etc. v. Sudden death vi. Welling out of neck, abdomen after death | Contact with infected animals and their products | Whole body | Sudden death of animals (sometimes without symptoms | If symptoms are noticed early, treat with antibiotics. | i. Vaccination ii. Isolation and slaughter of diseased animals should be burnt and buried.
|
Brucellosis (contagious bovide abortion | Bacteria | Cattle pigs | i. Inflammation of uterus and mammary glands ii. Abortion or pregnancy at 5th – 7th month as still birth iii. Retention of after birth | i. Direct contact with: - Infected after birth - Foetal fluid or aborted fetuses - Coition with infected bull. - Contaminated feed or pasture | Foetus (pregnancy) | i. Loss of foetus ii. Low rate of production iii. It is zoonotic (i.e. it can affect human beings). | No effective treatment | i. Vaccination ii. Report any occurrent to veterinary doctor |
Trypano somiasis (nagana) | Protozoa (trypanosoms) | Cattle | i. Severe anaemia ii. Intermittent fever iii. General weakness iv. Hairs on tail often pull-out v. Staggering vi. Death | By tse-tse fly | The brain | i. Drop in the level of production ii. Death of animals | Use drugs such as Babesin, Bayer 2005 etc. | i. Use insecticide to kill vectors (tse-tse fly) ii. Good sanitation such as cleaning and burning of bush. |
Bloat | Nutritional disorder | Ruminants (cattle, goat, sheep and rabbit) | i. Diarrhea ii. Prof use salivation iii. Swollen stomach iv. Vomiting v. Difficulty in breath vi. Death | Feeding on immature pasture | Stomach | Swollen stomach and digestive tract | i. Use defoaming agents such as groundnut ii. Pass a large tube into stomach to remove obstacle causing obstruct | i. Do not graze animals on immature pasture ii. Feed high protein supplements or feeds. |
COMMON DISEASES OF FARM ANIMALS
Name of disease | Causal organism (agent) | Animal affected | Symptoms | Mode of transmission | Body area affected | Effects | Treatments | Prevention on and control measures |
Mastitis | Bacteria | Ruminants may affect pigs | i. Swollen under ii. High temperature iii. Discharge of pus from the udder iv. Yellowish smelling milk | Through injury especially on the teat | Udder | Drop in milk yield | Injection of antibiotics Massaging the mammary gland after injection | i. Good sanitation ii. Clean milking practice to avoided injury iii. Keeping the udder dry
|
Krchi (cowpox or streptothricosis | Bacteria | Ruminatns and igs | i. High lesion ii. Irritation iii. Loss of hair iv. Swollen udder | - Direct contact with infected animals | Skin | i. Poor production of hair and milk | Treatment of wounds with tetracy cline capsules | i. Regular bathing ii. Disinfect and feeding and milking equipment iii. Vaccination on slaughter and bury infected animals |
Swine fever | Virus | Pigs | i. High temperature ii. Lost of appetite iii. Diarrohoea iv. Bluish discoloration at the ears, legs and snouth | Contact with infected pig | Whole body | Death of animals | No successful treatment, no available vaccine |
|
New castle disease (fowl plague) | Virus | Poulty | i. Sudden death without symptoms ii. Breathing difficulty iii. Loss of weight iv. Watery greenish diarrhea v. Diarrhea vi. Circling movement | i. Air borne spread ii. Contaminated vaccine and equipement iii. Infected birds | i. Nervous system ii. Respiratory tract | Loss of poultry birds | No effective treatment | i. Quarantine ii. Vaccination iii. Sanitation
|
COMMON DISEASES OF FARM ANIMALS
Name of disease | Causal organism (agent) | Animal affected | Symptoms | Mode of transmission | Body area affected | Effects | Treatments | Prevention on and control measures |
Fowl pox | Virus | Poultry | i. Blisters on comble, wattle and feed ii. Loss of weight iii. Reduced egg production | Bitting insects | Comb | Light weight poultry birds Low e.g. production | Use of antibiotics | iv. Vaccination on and sanitation v. Culling of diseased birds
|
Coccidiosis | Protozoa | Poultry, rabbits | i. Blood stained dropping or feaces ii. Loss of weight iii. Diarrhoea iv. Ruffle feathers | Feeding of infected feed, water and infected feaces | Digest ice tract | i. Reduced egg production ii. Death of animal | Use of sulphur drugs | i. Good sanitation ii. Use of coccidiotic tablets iii. Disinfect poultry houses before stocking |
Chronic respiratory disorder (CRD) | Myuco plasma (virus like microbe) | Poultry
| i. Nasal discharge ii. Swollen face iii. Breathing difficultry iv. Loss of weight | Breathing in of virus from contaminated feed, water or urine and | Air sac | iii. Loss of birds | Use of antibiotics | i. Sanitation ii. Good ventilation iii. Avoid use of dust litter |
Mange | Lice | Rabbit | Loss o hair |
| iii. Skin |
| Dusting with chemical | i. Dust with powder ii. Good sanitation
|
Evaluation: Differentiate between disease pathogens and disease vectors
Assignment: Mention seven (7) ways of preventing farm animal diseases
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