Role of a lipopolysaccharide gene for immunogenicity of the enterobacterial common antigen.

Role of the rfa locus in the immunogenicity of common enterobacterial antigen.

Escherichia coli O14 is one of the few strains of Enterobacteriaceae which in the rabbit engender antibodies in high titers against the common enterobacterial antigen (CA). It is a rough strain that does not possess a specific side chain in its lipopolysaccharide structure (rfa+rfb-). An rfa mutant (rfa-rfb-) was isolated from this parental strain. Chemical analysis revealed the absence of one ...

Cloning and Expression of Mannheimia haemolytica PlpE Gene in Escherichia coli and its Immunogenicity Assessment

Mannheimia haemolytica is responsible for considerable economic losses to cattle, sheep, and goat industries in many parts of the world. This bacterium isone of the causative agents of shipping fever in cattle. Current vaccines against M. haemolytica are moderately efficacious since they do not provide complete protection against the disease. Production of a...

Effect of heat on antigenicity and immunogenicity of the antigenic determinant shared by Haemophilus influenzae type b and Escherichia coli K100.

Escherichia coli K100 produces an antigenic determinant similar to, or identical with, the capsular antigen of Haemophilus influenzae type b. Studies of the effects of heat on the immunogenicity, erythrocyte-modifying capacity, and antigenicity of this cross-reacting antigen (CRA) revealed the following findings. Immunization of rabbits with viable or formaldehyde-killed suspensions of E. coli ...

Immunogenicity of Hemolysin, Protease and Lipopolysaccharide Extracted from Aeromonas hydrophila in Common Carp (Cyprinus carpio L.).

همسانه‌سازی و بیان ژن‌های ممزوجی دومن - a1 آنتی‌ژن حفاظتی با سیلوس آنتراسیس و زیرواحد B سم شیگلا در باکتری E. coli

Introduction: Shigella enterotoxin(STxB) is one of the major virulent factors in Shigella dysenteriae type 1 and E. coli O157:H7, which its immunogenicity, adjuvant and delivery characteristic have been proven. Anthrax is a common disease in humans and animals and identifies domain a-1 antibodies of protective antigen(PA) which is 62% of the PA antigens of Bacillus anthracis. Therefore, the pur...