Both Neisseria meningitidis and Haemophilus influenzae are capable of mimicking host structures by decorating their lipopolysaccharides with sialic acid. We show that a neuraminidase expressed by Streptococcus pneumoniae (NanA) is able to desialylate the cell surfaces of both these species, which reside in and possibly compete for the same host niche.
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Shakhnovich et al. (2002) studied this question.