Quality • Innovation • Simplicity CTK develops & manufactures innovative RAPID TESTS, ELISA kits and external CONTROLS. Our broad product range specializes in TROPICAL DISEASES & PARASITIC INFECTIONS, GASTROINTESTINAL & RESPIRATORY illnesses and CARDIAC & TUMOR markers. Use of proprietary recombinant antigens & antibodies produced in-house guarantees consistent supply of high quality products at an exceptional value. CTK brand and customized OEM packaging options. Reagents available for purchase. ISO 13485, US FDA registered