Name any four human diseases and mention their causative agents, mode of transmission and their preventive measures.

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Solution

Human disease
Pathogen
Mode of transmission
Preventive measures (general)
Tuberculosis

Bacteria

Air

Patient should be kept in isolation.
The personal belongings of the patient should be kept away from others.

Cholera

Bacteria

Water/food

Water should be boiled and food should be properly cooked before consumption.
One should maintain personal hygiene and good sanitary habits.
Hepatitis B
Virus
Water
Vaccination should be given at the proper time.
Water should be boiled before consumption.
Malaria
Protozoa
Mosquito
The breeding of mosquitoes should not be allowed. One should keep one’s surroundings clean and dry. Mosquito nets and repellents should be used to avoid contact with mosquitoes.

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Human disease	Pathogen	Mode of transmission	Preventive measures (general)
Tuberculosis	Bacteria	Air	Patient should be kept in isolation. The personal belongings of the patient should be kept away from others.
Cholera	Bacteria	Water/food	Water should be boiled and food should be properly cooked before consumption. One should maintain personal hygiene and good sanitary habits.
Hepatitis B	Virus	Water	Vaccination should be given at the proper time. Water should be boiled before consumption.
Malaria	Protozoa	Mosquito	The breeding of mosquitoes should not be allowed. One should keep one’s surroundings clean and dry. Mosquito nets and repellents should be used to avoid contact with mosquitoes.