Expression in Escherichia coli of a high-molecular-weight protective surface antigen found in nontypeable and type b Haemophilus influenzae.
An Escherichia coli clone producing a high-molecular-weight surface antigen of Haemophilus influenzae type b (Hib) was isolated from a library of Hib DNA fragments cloned as lysogens in a lambda replacement vector. The antigen is found in sarcosyl-insoluble outer membrane protein preparations and was produced by all 36 H. influenzae isolates tested. Absorption studies indicated that the antigen is a surface determinant on all isolates tested. Antibodies to the antigen (D15) were found in eight of nine convalescent-phase sera from children with invasive Hib infection. Affinity-purified antibodies prepared against the cloned antigen gave protection against the development of bacteremia in a rat pup model.
Clinical Immunology Research Unit, Princess Margaret Hospital, Subiaco, Western Australia.
W R
WR
Thomas
M G
MG
Callow
R J
RJ
Dilworth
A A
AA
Audesho
D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis / Q000276:immunology; D000942:Antigens, Bacterial / Q000235:genetics* / Q000276:immunology; D000954:Antigens, Surface / Q000235:genetics / Q000276:immunology; D001426:Bacterial Proteins / Q000235:genetics / Q000276:immunology; D003001:Cloning, Molecular; D004926:Escherichia coli; D006193:Haemophilus influenzae / Q000235:genetics / Q000276:immunology*; D008970:Molecular Weight; D051381:Rats; D014614:Vaccines, Synthetic
D000907:Antibodies, Bacterial; D000942:Antigens, Bacterial; D000954:Antigens, Surface; D001426:Bacterial Proteins; D014614:Vaccines, Synthetic