15.下列何者細胞壁不具Lancefield grouping antigen?
(A)Streptococcus agalactiae
(B)Streptococcus dysgalactiae
(C)Streptococcus pyogenes
(D)Streptococcus pneumoniae
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統計: A(132), B(487), C(268), D(1242), E(0) #2864583
統計: A(132), B(487), C(268), D(1242), E(0) #2864583