Inoculation & Precultures
The strain(s) for the production of polysaccharide(s) are provided by the customer for the initial production step.
Wacker Biotech is your CDMO partner of choice for the process development and manufacturing of a diverse array of vaccines, ranging from live, attenuated, inactivated and (conjugated) polysaccharide vaccines, to protein and mRNA-based vaccines.
Wacker Biotech has more than 30 years of experience manufacturing conventional vaccines using microbial hosts for various infectious diseases. We are proud to have partnered with clients to bring several commercial programs to market that continue to protect populations worldwide.
More recently, after years of research, we have developed the expertise to produce next-generation mRNA-based vaccines and have built a center of competence in Halle, Germany with four new dedicated lines for mRNA production. The state-of-the-art center was partially funded by the German Government as part of its Pandemic Preparedness program.
The strain(s) for the production of polysaccharide(s) are provided by the customer for the initial production step.
Leveraging Wacker Biotech’s EMA/FDA approved manufacturing lines (fermenter capacities ranging from 250 L single-use to 1,500 L stainless steel reactors) allows customers to adjust the scale of GMP processes to meet the needs of each project and development phase.
Purification of the polysaccharide from the fermentation broth usually includes several steps, such as:
• Centrifugation of the pathogen after chemical/thermal inactivation
• Concentration of intermediate product by ultrafiltration and/or depth filtration
• Precipitation of the polysaccharide using inorganic salts and/or organic solvents (explosion-proof rooms and equipment required)
• Chromatography steps
Conjugating the purified polysaccharide to a carrier protein involves dispensing the polysaccharides into LYOGUARD® trays for lyophilization. Bulk lyophilization runs of up to 65 L are supported.
The bulk lyophilized polysaccharides are activated through a chemical activation step.
In the final step, the activated polysaccharides are chemically conjugated to the carrier protein(s).