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31. Which disease is generally fatal among non-infectious diseases ?

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32. Which disease is generally fatal among non-infectious diseases ?

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33. Name two chemicals which are released during allergy.

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34. Where are macrophages found usually ?

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35. Name the causative organisms of

(i) Typhoid and (ii) Pneumonia.

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36. What steps should be taken to achieve good health.

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37. NAme the two chains of an antibody molecule.

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38.

Make a list of common infectious diseases.

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39. Write a note on common cold.

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Typhoid. 1. It is an infectious diseases caused by the bacteria, Salmonella typhi.

2. The infection occurs due to the intake of contaminated food and water.

3. The pathogen in the food or water enters the small intestine and then the other parts through blood.

4. It is charaterized by : (a) sustained high fever (103° - 104° F), (b) stomach pain, (c) loss of appetite, (d) constipation and (e) headache.

5. The intestine may become perforated and lead to death in severe cases.

6. Typhoid can be detected by Widal test.

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