Question

Complete the following table:

Pathogen	Disease	Prevention
	Plague	Using zinc phosphide to kill the pathogens.
Varicella zoster virus		Isolation of the patient and the articles used by them.
	African trypanosomiasis	Prevention of growth of tse-tse flies.
Wuchureria bancrofti

Answer 1

Plague

1. Plague is a vector-borne communicable disease.
2. It is caused by the bacteria Yersinia pestis.
3. The pathogen is transmitted by rat fleas from dead rats to human beings.
4. The pathogen can be killed using zinc phosphide.

Chickenpox

1. Chickenpox is a communicable disease caused by the Varicella zoster virus.
2. The disease is characterized by crusts formed all over the body, fever, and headache.
3. It spreads by direct contact with an infected person or the articles he is using.
4. Isolation of the patient and the articles used by them is done to prevent transmission of the disease.

African trypanosomiasis

1. African trypanosomiasis or sleeping sickness is caused by the protozoan Trypanosoma brucei.
2. It spreads by the bite of tse-tse flies which carry the pathogen.
3. The disease is characterized by anxiety, headache, fatigue, insomnia, and swelling of lymph nodes.
4. The disease can be prevented by inhibiting the growth of tse-tse flies and using insecticides.

Filariasis

1. Filariasis is caused by the helminth Wuchureria bancrofti.
2. It spreads through the bite of an infected Culex mosquito.
3. The disease is characterized by lymphoedema of the legs.
4. The disease can be prevented by using mosquito repellant and eradication of the vector Culex.

Pathogen	Disease	Prevention
Yersinia pestis	Plague	Using zinc phosphide to kill the pathogens.
Varicella zoster virus	Chickenpox	Isolation of the patient and the articles used by them.
Trypanosoma brucei	African trypanosomiasis	Prevention of growth of tse-tse flies.
Wuchureria bancrofti	Filariasis	Using mosquito repellant and eradication of the vector Culex.