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TABLE 1.

Key for S. flexneri subserotyping using the MASF panela

Serotype Type antigen specific
Group antigen specific
I II IV-2 V VI B Y-5 6 7,8 IV-1
1a + + +/−
1b + + +
1c +/− + +/−
2a + + +
2b + + +
3a + + +
3b + + +
4a + + +/− +/−
4b + + +
5a + + +
5b + + +
6 + + +/−
X + + +/−
Y + + +
a

+, positive reaction; +/−, variable reaction (antigen may or may not be detected); −, negative reaction (no antigen detected).