Preparat zmodyfikowanych genetycznie pęcherzyków, jego zastosowanie i zawierająca go szczepionka, zmodyfikowany Gram-ujemny szczep bakteryjny oraz sposób wytwarzania szczepionki
The present invention relates to an immuno-protective and non-toxic Gram-negative bleb vaccine suitable for paediatric use. Examples of the Gram-negative strains from which the blebs are made are N. meningitidis, M. catarrhalis and H. influenzae. The blebs of the invention have one or more genetic changes in the chromosome of the bacterium, including up-regulation of protective antigens, down-regulation of immunodominant non-protective antigens, and detoxification of the Lipid A moiety of LPS.
