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2004 AUG 4 - (NewsRx.com & NewsRx.net) -- Researchers have determined the distribution of adsorbed antigen in mono-valent and combination vaccines.
According to recent research published in the journal Vaccine, "The distribution of alpha-casein, bovine serum albumin (BSA), myoglobin, and recombinant protective antigen (rPA) in mono-valent and combination vaccines containing aluminum hydroxide adjuvant was studied by fluorescence microscopy and flow cytometry. Green and red fluorescent probes were conjugated to the antigens. Adsorption isotherms of the fluorescently labeled proteins to aluminum hydroxide adjuvant demonstrated that incorporation of the fluorescent probe did not significantly affect the adsorption."
"In mono-valent vaccine systems, antigen adsorption occurred within one minute and uniform surface coverage of the adjuvant aggregates was observed within 1 hour," said Garry L. Morefield and colleagues at Purdue University. "Content uniformity was achieved through a cycle of de-aggregation and re-aggregation of the aluminum hydroxide adjuvant aggregates caused by mixing. For combination vaccines, two antigens were adsorbed separately to the aluminum hydroxide adjuvant prior to ...