Table 5 Summary of the 50th (MIC 50) and 90th (MIC 90) percentiles of azithromycin minimum inhibitory concentrations (MIC) for S. Typhi and S. Paratyphi A isolates, by year and region.

From: Antimicrobial susceptibility trends of S. Typhi and S. Paratyphi in a post-COVID-19 pandemic India, from a multicenter surveillance network

Region

Year

Overall

2021

2022

2023

Isolates (n)

% of n sus.

MIC 50

MIC 90

Isolates (n)

% of n sus.

MIC 50

MIC 90

Isolates (n)

% of n sus.

MIC 50

MIC 90

Isolates (n)

% of n sus.

MIC 50

MIC 90

S. Typhi

 North

52

100

2

4

261

100

4

4

223

100

4

8

536

100

4

8

 South

19

100

2

4

68

100

2

4

40

100

4

6

127

100

4

4

 East

0

–

–

–

27

100

2

4

17

100

4

4

44

100

4

4

 West

72

100

2

4

223

100

2

4

71

100

4

4

366

100

2

4

 Total

143

100

2

4

579

100

2

4

351

100

4

8

1073

100

2

4

S. Paratyphi

 North

12

100

4

4

52

100

4

8

36

97.2

8

8

100

99.0

4

8

 South

10

100

4

8

14

100

4

8

3

100

4

16

27

100

4

8

 East

0

–

–

–

13

100

4

8

3

100

4

4

16

100

4

8

 West

23

100

2

4

61

100

4

8

21

100

4

8

105

100

4

8

 Total

45

100

4

8

140

100

4

8

63

98.4

8

8

248

99.6

4

8

  1. The proportions of isolates susceptible (sus) to azithromycin as per Clinical and Laboratory Standards Institute guidelines are also included. All MIC measures are in µg/mL.
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