The Vibrio cholerae mannose-sensitive hemagglutinin is the receptor for a filamentous bacteriophage from V-cholerae O139

被引:37
作者
Jouravleva, EA
McDonald, GA
Marsh, JW
Taylor, RK
Boesman-Finkelstein, M
Finkelstein, RA
机构
[1] Univ Missouri, Sch Med, Dept Mol Microbiol & Immunol, Columbia, MO 65212 USA
[2] Dartmouth Coll, Sch Med, Dept Microbiol, Hanover, NH 03755 USA
关键词
D O I
10.1128/IAI.66.6.2535-2539.1998
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
We previously isolated from a 1994 isolate of Vibrio cholerae 0139 a filamentous lysogenic bacteriophage, choleraphage 493, which inhibits pre-0139 but not post-0139 El Tor biotype V. cholerae strains in plaque assays. We investigated the role of the mannose-sensitive hemagglutinin (MSH[A) type IV pilus as a receptor in phage 493 infection. Spontaneous, Tn5 insertion, and mshA deletion mutants are resistant to 493 infection. Susceptibility is restored by mshA complementation of deletion mutants. Additionally, the 493 phage titer is reduced by adsorption with MSHA-positive strains but not with a Delta mshAl strain. Monoclonal antibody against MSHA inhibits plaque formation. We conclude that MSHA is the receptor for phage 493, The emergence and decline of 0139 in India and Bangladesh are correlated with the susceptibility and resistance of El Tor strains to 493. However, mshA gene sequences of post-0139 strains are identical to those of susceptible pre-0139 isolates, indicating that phage resistance of El Tor is not due to a change in mshA. Classical biotype strains are (with rare exceptions) hemagglutinin negative and resistant to 493 in plaque assays. Nevertheless, they express the mshA pilin gene. They can be infected with 493 and produce low levels of phage DNA, like post-0139 El Tor strains. Resistance to 493 in plaque assays is thus not equivalent to resistance to infection. The ability of filamentous phages, such as 493, to transfer large amounts of DNA provides them, additionally, with the potential for quantum leaps in both identity and pathogenicity, such as the conversion of El Tor to 0139.
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页码:2535 / 2539
页数:5
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