Gram-negative bacterial vaccines

A - Human Necessities – 61 – K

Patent

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Details

A61K 39/02 (2006.01) A61K 39/102 (2006.01)

Patent

CA 2123222

There is provided by this invention a novel method of preparing Gram-negative bacterial vaccines. The method comprises providing a concentrated Gram-negative bacterial antigenic preparation, adsorbing the preparation with a mineral carrier capable of binding free-endotoxin in the antigenic preparation in an amount effective to produce optimal binding of endotoxin and antigen and diluting the adsorbed preparation for use in a vaccine. Also provided by this invention is a vaccine produced by the method of this invention. Also provided by this invention is a Gram-negative bacterial vaccine wherein the improvement comprises a concentration of mineral carrier in the vaccine which is less than 5.0% v/v. Also provided by this invention is a Gram-ne-gative bacterial vaccine comprising a mineral carrier wherein the amount of the mineral carrier in the vaccine has been predetermined by the method of this invention. Also provided by this invention is a method of vaccinating an animal against Gram-negative bacterial infections comprising administering to the animal an effective amount of a vaccine of this invention.

L'invention concerne un nouveau procédé de préparation de vaccins bactériens Gram-négatifs. Le procédé consiste à utiliser une préparation antigénique bactérienne concentrée Gram-négative, à adsorber la préparation avec un véhicule minéral capable de lier l'endotoxine libre dans la préparation antigénique dans une quantité efficace pour produire une liaison optimale d'endotoxines et d'antigènes et à diluer la préparation adsorbée pour l'utiliser dans un vaccin. L'invention concerne également un vaccin produit par le procédé de cette invention. L'invention décrit également un vaccin bactérien Gram-négatif dans lequel l'amélioration consiste à utiliser une concentration de véhicule minéral dans le vaccin inférieure à 5,0 % v/v. L'invention concerne également un vaccin bactérien Gram-négatif comprenant un véhicule minéral dans lequel la quantité de ce véhicule minéral a été prédéterminée par le procédé de cette invention. L'invention décrit également un procédé de vaccination d'un animal contre des infections bactériennes Gram-négatives et consistant à administrer à l'animal une quantité efficace d'un vaccin de cette invention.

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