Antibodies (IgG) to lipopolysaccharide of Vibrio cholerae O1 mediate protection through inhibition of intestinal adherence and colonisation in a mouse model
S. Mukhopadhyay et al., Antibodies (IgG) to lipopolysaccharide of Vibrio cholerae O1 mediate protection through inhibition of intestinal adherence and colonisation in a mouse model, FEMS MICROB, 185(1), 2000, pp. 29-35
An antiserum raised against purified lipopolysaccharide (LPS) of a Vibrio c
holerae O1 strain (Co366) induced passive protection against challenge with
the parent as well as other O1 organisms but not against O139 or non-O1/no
n-O139 organisms. A considerable level of protection against O1 strains was
also observed with the IgG fraction of the antiserum which inhibited intes
tinal adherence and colonisation. The monovalent Fab(IgG) fragment, on the
other hand, showed only a low level of protection. Interestingly, purified
LPS Failed to inhibit intestinal colonisation by the parent strain (Co366),
thereby suggesting that the cell surface LPS moieties of vibrios may not b
e directly involved in the colonisation process. It may be concluded that t
he anti-LPS antibodies induce passive protection through microagglutination
and/or immobilisation of vibrios which do not allow the organisms to adher
e to and colonise the intestine. (C) 2000 Federation of European Microbiolo
gical Societies. Published by Elsevier Science B.V. All rights reserved.