Zusammenfassung
Neisseria lactamica, isolated from a baby with septicaemia, was at first thought to be Neisseria meningitidis, possibly acquired in hospital. Extensive investigation of contacts was made until the O-nitrophenyl-D-galactopyranoside reaction proved positive. Distinction between the two species, easily made in this way, is important both in individual patients and in population surveys.
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