Abstract

In the years 2006–2011, 617 Proteus spp. strains isolated mostly from urine and wounds or other clinical sources were collected in Łódź, Poland, to determine the offensive O serotypes frequently occurring among patients. P. mirabilis exhibited the most intensive swarming growth and was dominating species (86.9%), followed by P. genomospecies, P. vulgaris, and P. penneri. Ninety four per cent strains were recognized as S (smooth) forms. Serological studies (involving ELISA—enzyme-linked immunosorbent assay and Western blotting using native and adsorbed rabbit antisera) enabled classification of 80% S isolates into respective Proteus O serogroups among the 83 ones, described so far. The remaining strains seemed to be serologically unique. Despite the observed big serological variety of Proteus spp. isolates, we found the O78 serogroup recently described in Poland as dominating and identified other widespread serotypes: O3, O6, O10, O11, O27, O28, and O30 reported earlier as predominating also in other countries; O77 and O79 detected lately in Poland; O16, O18, O20, and O50. No unique structural feature of the prevalent O serotypes has been indicated. However, the prevalence of some O serogroups indicates that particular serotypes may be in some ways beneficial to the strains producing these kinds of O antigen.

Highlights

  • Proteus spp. bacteria are peritrichously flagellated members of Morganellaceae family distinguished from the other representatives of the order Enterobacterales by intensive and spectacular swarming growth on solid media as a result of the multicellular differentiation ­phenomenon[1,2]

  • It was shown that the eleven Proteus spp. strains were inhabiting the intestines of 5.8% from 189 individuals

  • 41 isolates (6.6%) were found to belong to P. genomospecies 4 or 5/6, the two last are still impossible to distinguish on the grounds of their metabolic ­properties[4,5], while no isolate was classified to P. hauseri species

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Summary

Introduction

Proteus spp. bacteria are peritrichously flagellated members of Morganellaceae family distinguished from the other representatives of the order Enterobacterales by intensive and spectacular swarming growth on solid media as a result of the multicellular differentiation ­phenomenon[1,2]. These bacilli are detected in natural environments (water or soil) and in many species of wild and domestic animals. In this work the serological variety of the whole collection of Proteus spp. strains is shown focusing on Proteus O serogroups most widespread in central Poland (Łódź region)

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