World class contract research services

Global Access Diagnostics offers a complete range of services to researchers, developers and manufacturers of rapid point-of-care assays and devices.

Our team of more than 40 scientists has extensive experience in dealing with simplex or multiplex tests, device housing and product design, both for unique test systems and for our innovative enzyme activity detection (ELTABA) platform.



GADx has produced hundreds of rare biomolecules for clients and for our own in-house development. Our expertise is in the production of highly specific and well characterized reagents including those used in immunoassays where performance is directly related to reagent sensitivity, specificity and purity. We have deep experience in developing or sourcing high affinity antibodies and controlling methods for production of recombinant Fab binding molecules that are directed toward your analyte of interest. In addition, we’ve developed methods for increasing the immunogenicity of your antigen with the inclusion of virus like particles (VLP) in the immunization strategy.

Affinity purification is an ideal way to increase reagent specificity. GADx can provide detailed purification strategies or deliver highly purified material based on your target antigen. We offer additional process development services relating to enrichment of recombinant proteins and monoclonal antibodies. Our experience in immunoassay design has allowed us to optimize and develop procedures for biomolecule conjugation, buffered surfactants and scale-up for manufacturing.

Impure reagents can lead to downstream design flaws and finished product instability, so it is crucial we ensure reagents are free of contaminants. GADx has invested heavily in both staff and equipment capability to fully assess reagent purity. To do this, we utilize chromatography tools (ex. FPLC, HPLC), electrophoresis tools (ex. SDS-PAGE/ Western blot) and spectrometry tools (ex. UV/VIS, fluorimetry, dynamic light scattering, and mass spectrometry).

The characterization of biomolecule activity is paramount to its utility and allows for appropriate downstream inclusion. Our capability uses information gathered from peptide epitope mapping,

Immunoassays come in many shapes, sizes, and forms. GADx has been involved in them all, from microwell EIA testing, to dipstick lateral flow tests, to fully integrated over the counter disposable systems. Our experience can help determine proper detection strategy (enzymatic, electrochemical, visual nanoparticle) as well as test through-put. We also have the ability for rapid prototyping (3D printing) to create custom housing that can integrate sample collection and the processing steps.

GADx also offers services related to laser etching and freeze dry lyophilization. In addition, our patented enzyme activity detection technology (ELTABA) is available for use.

GADx's core competency is in delivering immunoassays that meet a market need. This involves verifying clinical utility with confirmed samples, characterization and elimination of sample matrix effects, and product shelf-life stability. These important activities are included with any of our contract development offerings and can be utilized separately, for your specific needs. In addition, we offer consulting services relating to human factor usability, up-stream marketing and voice of the customer. We are ISO 13485:2016 and MDSAP approved and can provide IQ/OQ/PQs, design history files, batch records and other required regulatory documentation. We have strong links to the clinical community and have undertaken numerous trials, so we can facilitate small scale clinical trials as well as training sets and user simulation sessions.

GADx is committed to enabling tests to be digitally connected to support more accurate diagnoses and better use of data to support surveillance and other public health needs. We can work with you ensure the tests we develop together are readable by a variety of readers, and can help you select the right partners to develop companion apps, middleware and other data management services.

Diagnostic companies

You are looking for innovation and scientific excellence to help advance your R&D agenda and ensure your devices are the best on the market.

Pharma and Life Sciences Companies

You are looking for a companion diagnostic to better serve your target population, enabling them to understand their health status and empowering them to take action on it through a service or treatment you provide.

Global health R&D funders

You are looking for a company that prioritizes impact to address a pressing global health need, safe in the knowledge that our incentives are aligned to continue to provide products with access and impact prioritized above profit.