The sera from two patients with murine typhus reacted with whole cells of Rickettsia prowazekii, R. typhi, and Proteus vulgaris OX19, and with lipopolysaccharides (LPS) from the spotted fever group rickettsia strain TT-118 and P. vulgaris OX19 in the enzyme-linked immunosorbent assay. Sera from these patients reacted with ladder-like bands of LPS from R. prowazekii and R. typhi in the immunoblot, whereas the reactivity of these sera with LPS from P. vulgaris OX19 differed from each other. These results indicate that LPS from the typhus group rickettsiae and P. vulgaris OX19 contain similar epitopes.
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Micron
January 2013
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View Article and Find Full Text PDFStructural studies on the lipopolysaccharide core of Proteus OX strains used in Weil-Felix test: a mass spectrometric approach.
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November 2003
N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt 47, 119991 Moscow, Russian Federation.
The core region of the lipopolysaccharides of Proteus group OX bacteria, which are used as antigens in Weil-Felix test for serodiagnosis of rickettsiosis, were studied by chemical degradations in combination with ESI FTMS, including infrared multi-photon dissociation (IRMPD) MS/MS and capillary skimmer dissociation. Structural variants of the inner core region were found to be the same as in Proteus non-OX strains that have been studied earlier. The outer core region has essentially the same structure in Proteus vulgaris OX19 (serogroup O1) and OX2 (serogroup O2) and a different structure in Proteus mirabilis OXK (serogroup O3).
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