Q7 of 35 Page 185

List any four ways in which antibiotics are being used.

(a) Antibiotics have a wide use in medicine to fight infections.


(b) Certain antibiotics are used as food preservatives, especially for fresh meat and fish.


(c) Some antibiotics are used in treating animal feed to prevent internal infections.


(d) Some antibiotics are used for controlling plant pathogens.


More from this chapter

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5

Given below is a scheme of classifying immunity against human diseases. Fill up the types of immunity in the blanks 1 - 9.

 6

Given below are the groups of certain substances of particular categories. Mention the category of each group and identify the one wrong example in it giving a reason.

(a) Lysol, benzoic acid, DDT, mercurochrome.


(b) Formalin, iodine, Lysol, phenol.


(c) BCG, DTP, ATP.


(d) Tears, skin, nasal secretion, HCl (in the stomach).

 8

List the merits of local defense systems.

 9

Suppose a person develops the disease diphtheria.

Comment upon the principle of the treatment he should receive.