Cytobas

Illuminating allergy with functional precision

CytoBas is transforming allergy diagnostics with a novel multiplex flow cytometry assay that offers rapid, accurate, and functionally relevant results. Unlike traditional tests that rely on serum IgE or skin reactions, CytoBas directly detects allergen-specific IgE bound to basophils—the immune cells that trigger allergic responses. 

This innovative approach enables precise diagnosis and risk stratification, even in complex cases involving multiple allergies. Clinically validated for allergens like house dust mite, grass pollen, cat, and dog, the technology is now expanding to include food and drug allergens. 

Compatible with standard flow cytometry equipment and requiring no fresh blood or in vitro stimulation, CytoBas is easy to implement in routine care. The technology supports personalized allergy management and monitoring of immunotherapy responses—positioning it as a scalable, next-generation solution in a growing global market. 

Team
Menno van Zelm
Sayuri Iwasaki
Hessel van der Weide
Startup activities

Venture Challenge Fall 2025