Questions and answers about case definitions

Why make case definitions? There are 2 purposes:

a) to determine treatment;

b) for recording and reporting (see Chapter 2).

Why do case definitions determine treatment? There are 3 reasons:

a) to identify priority cases;

b) to make the most cost-effective use of resources (by targeting resources on priority cases);

c) to minimize side-effects for patients (by using the most intensive regimens only for certain cases).

What determines a case definition? There are 4 determinants: a) site of TB;

b) result of sputum smear;

c) previous TB treatment;

d) severity of TB.

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