We offer everything you need to succeed with immune monitoring by ELISPOT and FluoroSpot.


ImmunoSpot® Analyzers
Our leading high-throughput analyzers are multifunctional devices enabling tests that are frequently performed in immune monitoring laboratories.


Kits & Components
Explore our catalogue ImmunoSpot® kits, that enable reliable detection of antigen specific reactivity in immune cells.


CRO Services
We provide the resources and logistics for immune monitoring studies for clients, large and small.


PBMC
Large volume of genetically and immunologically characterized fully-functional cryopreserved PBMC from an extensive donor library.
Antibodies
Antibodies that enable detection of ferret Ig using Western blot, ELISA, flow cytometry, ELISPOT and FluoroSpot techniques.
Reagents
Solution to allow scientists to preserve their own fully-functional PBMC samples.
Positive Controls
Explore our positive controls for antigen-driven activation of CD4+ and CD8+ T cells.
Media
Serum-free media for low background and high signal for consistent performance in ImmunoSpot® assays.
MAT
Comprehensive alternative to the antiquated Rabbit Pyrogen Test and the Limulus Amebocyte Lysate assay.
Kit Scanning Services
ELISPOT & FluoroSpot analysis services for customers without an analyzer.
FEATURED SOFTWARE
S6 BioSpot™ Software Suite
This suite supports Image-analysis of neutralization assays, colony counting, and more of any well format in a high-throughput manner.


Our Publications
CTL prides itself on an active, in-house ELISPOT/FluoroSpot-oriented research effort that pushes the boundaries of immune monitoring. Explore over 200 publications by our scientists.
Featured Publications
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Paul V. Lehmann, Alexey Y. Karulin, Noémi Becza, Lingling Yao, Zhigang Liu, Jack Chepke, Andrea Maul-Pavicic, Carla Wolf, Sebastian Köppert, Alexis V. Valente, Anton V. Gorbachev, Magdalena Tary-Lehmann and Greg A. Kirchenbaum
Journal of Immunological Methods, 2025, Volume 537, 113817
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Lingling Yao, Noémi Becza, Georgia Stylianou, Magdalena Tary-Lehmann, Stephen Todryk, Greg A. Kirchenbaum, and Paul V. Lehmann
Vaccines 2025, 13(9), 944
About Cellular Technology Limited (CTL)
CTL is the only company that, for over 25 years, has focused on advancing ALL ASPECTS of immune monitoring by ELISPOT/FluoroSpot (collectively called ImmunoSpot® )