A new mannose‐resistant haemagglutinin in Klebsiella

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Abstract
Klebsiella strains of the species (or patho-bio-sero-geogroups) K. atlantae, K. edwardsii and K. rhinoscleromatis produced neither hemagglutinins (HA) nor fimbriae; strains of K. ozaenae were HA- but some produced type 6 fimbriae; and strains of K. pneumoniae (s.s.) and K. aerogenes that produced the mannose-sensitive HA (MS-HA) formed type-1 fimbriae. Most strains of K. aerogenes also produced 1 or both of the mannose-resistant HA, MR/K-HA or MR/P-HA. The former, associated with type 3 fimbriae, was produced by 95%, and the latter by 57%, of the K. aerogenes strains. Some properties of the MR/P-HA, apparently a non-fimbrial HA not previously recognized in Klebsiella, are described.