About Ambriex in Brazil. They serve the South American market; unfortunately, the text is in Portuguese. If you speak some Spanish, you should be able to make sense of what their website says:

• Ambriex main page
• Products

General Elispot references

• Targoni, O.S. and P.V. Lehmann. 1998. Endogenous myelin basic protein inactivates the high avidity T cell repertoire. J. Exp. Med. 187: 2055-2063.
• Karulin, A., M. Hesse, M. Tary-Lehmann, and P.V. Lehmann. 2000. Single-cytokine-producing CD4 memory cells prevail in vivo, in type 1/type 2 immunity. J. Immunol. 164: 1862-1872.
• Heeger, P.S., T. Forsthuber, C. Shive, E. Beikert, C.P. Genain, H.H. Hofstetter, A.Y Karulin, and P.V. Lehmann. 2000. Revisiting tolerance induced by autoantigen in incomplete Freund's adjuvant. J. Immunol. 164: 5771-5781.
• Yip, H.C., A.Y. Karulin, M. Tary-Lehmann, M.D. Hesse, H. Radeke, P. Heeger, R.T. Trezza, F.P. Heinzel, T. Forsthuber, and P.V. Lehmann. 1999. Adjuvant guided type 1 and type 2 immunity: Infectious/ non-infectious dichotomy defines the class of response. J. Immunol. 162: 3942-3949.
• Heeger, P.S., A. Valujskikh, and P.V. Lehmann. 2000. Comprehensive assessment of determinant specificity, frequency, and cytokine signature of the primed CD8 cell repertoire induced by a minor transplantation antigen. J. Immunol. 165: 1278-1284.
• Heeger, P.S., N. Greenspan, S. Kuhlenschmidt, C. Dejelo, D.E. Hricik, J. Schulak and M. Tary-Lehmann. 1999. Pretransplant frequency of donor specific, IFN-? producing lymphocytes is a manifestation of immunologic memory and correlates with the risk of posttransplant rejection episodes. J. Immunology. 163: 2267-2275.
• Heeger, P.S., A. Valujskih and P.V. Lehmann. 2000. Comprehensive assessment of determinant specificity, frequency, and cytokine signature of the primed CD8 cell repertoire induced by a minor transplantation antigen. J. Immunol. 165: 1278-1284.
• Gebauer, B.S., D.E. Hricik, A. Atallah, K. Bryan, J. Riley, M. Tary-Lehmann, N.S. Greenspan, B.O. Boehm, B.J. Hering and P.S. Heeger. 2002. Evolution of the Enzyme-Linked Immunosorbent Spot Assay for Post-Transplant Alloreactivity as a Potentially Useful Immunme Monitoring Tool. The American Journal of Transplantation. 9: 857-866.
• Pelfrey, C.M., R.A. Rudick, A.C. Cotleur, J.C. Lee, M. Tary-Lehmann, and P.V. Lehmann. 2000. Quantification of self-recognition in multiple sclerosis by single-cell analysis of cytokine production. J. Immunol. 165: 1641-1651.
• Karulin, A.Y., M.D. Hesse, H.C. Yip, and P.V. Lehmann. 2002. Indirect IL-4 pathway in Th1 immunity. J. Immunol. 168: 545-553.
• Anthony, D.D., and P.V. Lehmann. 2003. T-cell epitope mapping using the ELISPOT approach. Methods. 29: 260-269.
• Another list