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Table 2 Contact tracing results of smear-positive pulmonary and other tuberculosis patients of the cluster.

From: A Mycobacterium tuberculosiscluster demonstrating the use of genotyping in urban tuberculosis control

 

Number of contacts examined

Number of contacts examined with TST

Number of tuberculosis infections

Proportion of tuberculosis infections among those tested

Tuberculosis cases

Mr. X

3

1

1

100

Case 2

Case 2

23

14

1

7

Case 3

Case 4

0

0

0

0

 

Case 9

24

5

0

0

 

Case 10

50

41

1

2

 

Case 11

194

154

24

16

(Case 16)

Case 13

45

33

0

0

 

School

1,730

964

40

4

Case 15

Case 14

1

0

0

0

Case B

Case 18

11

4

0

0

Case C

Case 22

31

15

1

7

 

Case 23

4

4

1

25

 

Case D

3

3

3

100

 

Case 25

10

2

0

0

 

Hospital

100

92

1

0

 

Case 28

32

8

3

38

 

Other

67

32

3

9

Case A

Total

2,328

1,372

79

5.8

6

  1. Cases with a number are culture-confirmed; cases with a letter are culture-negative cases epidemiologically linked to the cluster. Case 16 (in brackets) was diagnosed with latent TB infection and later developed TB (see also Results).