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CEDRE, Bárbara  and  HERNANDEZ, Yaremis. Bactericide serum assay to assess the immune response induced by meningococcal and cholera vaccines . Vaccimonitor [online]. 2012, vol.21, n.3, pp.37-46. ISSN 1025-028X.

The susceptibility to the serum bactericidal system is a characteristic of gram-negative bacteria. There are many well-documented instances of enterobacterial susceptibility to complement. In fact, any prokaryote that presents a lipid bilayer membrane would appear to be potentially susceptible to complement killing, although there are gram-negative bacteria that appear refractory to the serum bactericidal and bacteriolytic systems; these resistant strains are frequently isolated as causative agents of infections involving tissue damage. It has therefore been suggested that serum resistance is an important determinant of virulence in at least some infections due to gram-negative bacteria. In some diseases caused for these bacteria, vaccination constitutes the more effective way, such as cholera and meningococci meningitis. Antibodies with lytic capacity induced for vaccination protect against infection and/or disease, that is why serum bactericidal assay is the gold test for evaluating the efficacy of many vaccines. Clinical trials conducted with N. meningitidis A, B, C, Y and W135 vaccines and with live attenuated or inactivated cholera vaccines have shown the induction of antibodies with lytic activity which have correlated with protection in efficacy trials or in a experimental challenge, for that reason is important the standardization and validation of these assays for its application as immunogenicity rule in the vaccines development.

Keywords : Bactericidal assay; vaccines; gramnegative bacteria.

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