Categories: Lesson Notes

JSS 2 Second Term Agricultural Science Lesson Note – Mode of Transmission of Disease Causing Organisms

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TOPIC: Animal Pests and Disease Control (contd)

CONTENT:

Mode of transmission of farm animals

Sub-Topic 1: Mode of Transmission of disease causing Organisms

The following are the mode of transmission of farm animals diseases from one animal to the other.

Airborne
Animal carriers e.g visitors, attendants etc.

Direct contact with infected animals

Types of Diseases based on mode of transmission

Diseases of livestock could be:

Infectious disease: Infectious disease affects animals without physical contact with the infected animals. It can be transmitted to healthy animals through water, air, or feeds. eg Anthrax, Coccidiosis, and Fowl typhoid.

Contagious disease: Contagious disease affect animals when there is physical contact with the infected ……

Farm animal diseases/ Symptoms of farm animal diseases/ Mode of transmission

The table below shows the name of disease, the causative organism, the animals affected, symptoms, mode of spread and control measures.

Name of Disease	Causative organisms	Animals Affected	Symptoms	Mode of spread	Control measures
Mastitis	Bacteria	Cattle, sheep, goat, pig	The udder becomes swollen, reddened and painful	Water, food, injuries on the udder, milking marching	Good hygiene, get rid of flies, disinfect milking marching
Contagious abortion		Cattle, sheep, goats, pigs	Irritation, catarrhal condition in the womb	Servicing by infected bull, flies, contaminated pasture	Vaccination, contact vet. Doctor.
Anthrax		Cattle, sheep, goats	– Blood stained discharges from mouth or nostril – death – swelling in the neck	Contact with infected animals & their products	Vaccination, disinfect pens, burn or burry dead animals.
Tuberculosis		Cattle, sheep, goats, poultry, pigs	Persistent cough, emaciation, death	Contact with discharge or sputum of infected animals	No treatment. Kill and burry infected animals. Vaccination