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Table 2 Frequency of the serotype distribution of S. flexneri subtypes

From: Extensive inter-strain diversity among clinical isolates of Shigella flexneri with reference to its serotype, virulence traits and plasmid incompatibility types, a study from south India over a 6-year period

National and International studies

S. flexneri subtypes identified in order of dominance

Present study, India (n = 101)

2a > 6 > 3b > 1b > 1v > 4

Kolkata, 2010, India (n = 154)

2a > 3a

Kolkata, 2014, India (n = 47)

2a > 3a > 6 > 4a > 7a/1c

Bay of Bengal Islands, India 2014 (n = 55)

2a > 4a > 3b = X > 3a = 1a = 6

China, 2013 (n = 4295)

2a > 4c/Xv > X > 4a = 1a > 2b > Y >  6 > 4b > 5a = 3a > 1b

China, 2017 (n = 545)

2a > 2b > 1a > 1b > X > 4c/Xv > Y > 6 > 4a > 3b

China, 2018 (n = 365)

2a > 1b > 2b > 6 > X > 1a > Y > 4 s/Z > 4a = 3a > 2c > 7a/1c = 3b

Bangladesh, 2014 (n = 415)

2a > 2b > 3a > 6 > 1b > 4a > 7a/1c > Y > 5b > 1a > 3b

Gems, 2014, 7 countries (n = 745)

2a > 6 > 2b > 3a > 1b > 4a > 7a/1c > X > Y>1a = 5b > 3b

Bangladesh, 2018 (n = 3569)

2a > 3a > 2b > 6>1b > 7a/1c > 4 s/Z > Y>1a > 3b = X > 4a = 5a > 4b > 5b