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Table 3 Superantigen genotype and distribution across emm type

From: Distribution of superantigens in group A streptococcal isolates from Salvador, Brazil

Genotype speA speC speG speH speI speJ speK speL speM ssa smeZ emm12 (40) emm1 (25) emm66 (12) p-value
A (n = 1) X   X   X     X   X 0 1 (4%) 0  
B (n = 17) X   X         X 0 13 (52%) 4 (33.3%) <.001
C (n = 1) X   X    X     X X 0 1 (4%) 0  
D (n = 7) X   X    X      X 0 7 (28%) 0 <.001
E (n = 3) X   X   X       X 0 2 (8%) 1 (8.3%)  
F (n = 1) X   X   X X      X 0 1 (4%) 0  
G (n = 1)    X X X     X   X 1 (2.5%) 0 0  
H (n = 2)   X X X X      X X 2 (5%) 0 0  
J (n = 19)   X X X X       X 19 (47.5%) 0 0 <.001
K (n = 3)   X X         X 3 (7.5%) 0 0  
M (n = 2)   X X X X     X   X 2 (5%) 0 0  
N (n = 8)    X X X       X 5 (12.5%) 0 3 (25%)  
O (n = 1) X X X X X       X 1 (2.5%) 0 0  
P (n = 1)    X         X 0 0 1 (8.3%)  
Q (n = 4)   X X   X       X 4 (10%) 0 0  
R (n = 1)   X X X X X      X 1 (2.5%) 0 0  
S (n = 1)   X X   X      X X 1 (2.5%) 0 0  
T (n = 1)    X X X X       0 0 1 (8.3%)  
U (n = 2)    X X X      X X 1 (2.5%) 0 1 (8.3%)  
V (n = 1) X   X X X       X 0 0 1 (8.3%)  
  1. Superantigen genotypes B and D were found significantly more often in emm type 1 isolates. Superantigen genotype J was found significantly more often in emm type 12 isolates. P-values were generated with the two-sided Fisher’s exact test.