Resumen de Klebsiella pneumoniae of suspected human origin from free-living common seals on the east coast of England

James Paul Duff, C.A. Bidewel, S.M. Williamson, C.J. Teale, M.F. Stidworthy, S. Bexton, M. AbuOun, L. Randall, J.P. Rogers

• KLEBSIELLA pneumoniae subspecies pneumoniae (Kpp) was isolated from three, free-living, juvenile common seals (Phoca vitulina) found, independently, in ill-health or abandoned ashore on the east coast of England. The seals were hospitalised at two rehabilitation centres. Postmortem examinations revealed lesions of neck abscessation, pleurisy and pyothorax in one seal, and omphalitis and peritonitis in a second seal. The third seal had a ruptured optic globe but survived (and was eventually released).

  Kpp was recovered from lesion swabs by culture on blood agar under standard aerobic conditions and further characterisation of isolates was by multilocus sequence typing (MLST). Sequence type (ST)398 was identified in one seal and ST11 in two seals.

  All three Kpp isolates showed multiple antibiotic resistance in broth microdilution susceptibility tests. ST11 represents an epidemic clone of Kpp which is found worldwide in man, often with extended-spectrum β-lactamase (ESBL) or, more recently, carbapenemase resistance. The resistance patterns and molecular typing of the Kpp isolates suggest that microbial marine pollution of human origin, possibly from human sewage, may have been the source of these infections in juvenile seals.