[Comparison between two types of pertussis vaccines]

Area of Science:

• Microbiology
• Vaccine Development
• Immunology

Background:

• Pertussis (whooping cough) remains a significant public health concern, necessitating effective vaccine production methods.
• Current vaccine production involves laboratory-scale stationary cultures, which may limit yield and reproducibility.
• Optimizing cultivation techniques is crucial for meeting global demand for pertussis vaccines.

Purpose of the Study:

• To compare the efficacy and characteristics of pertussis vaccines produced via laboratory and industrial cultivation methods.
• To evaluate the yield, toxicity, and histamine sensitization of vaccines from different production scales.
• To assess the reproducibility of industrial vaccine production.

Main Methods:

• Laboratory cultivation of *Bordetella pertussis* on Hornibrook medium in stationary culture.
• Industrial cultivation of *B. pertussis* in homogenous culture using B-2 medium in a fermentor.
• Assessment of vaccine yield (org. x 10(9)/ml), non-toxicity (mouse weight gain), and histamine sensitization in mice.

Main Results:

• Industrial cultivation yielded 4 to 7 times higher *B. pertussis* concentrations compared to laboratory methods.
• Both laboratory and industrially produced vaccines demonstrated non-toxicity in mice.
• Vaccines produced via industrial fermentation exhibited lower histamine sensitization in mice than those from stationary flask cultures.

Conclusions:

• Industrial-scale fermentation offers a significantly higher yield for pertussis vaccine production.
• Industrial methods produce vaccines with improved immunological profiles (less histamine sensitization) and high reproducibility.
• Fermentor-based production is a viable and superior alternative for large-scale, quality-controlled pertussis vaccine manufacturing.