Włodzimierz Ptak

Włodzimierz Wojciech Ptak, M.D. (born 2 November 1928) is a Polish immunologist and microbiologist, retired professor at the Institute of Immunology at the Jagiellonian University Medical College. He is a member of the Polish Academy of Sciences (since 1986) and Polish Academy of Learning (since 1989).
In 1977 he was decorated with a Knight's Cross of Polonia Restituta, and in 1997 with a Commander's Cross of Polonia Restituta.

• Transformation of hamster macrophages into giant cells with antimacrophage serum (co-authors: Zofia Porwit-Bóbr, Z. Chlap), „Nature”, 225, 1970;
• Immunosupression effected by macrophage surfaces (co-author R. K. Gershon), „Journal of Immunology” 115, 1975;
• Role of antigen-presenting cells in the development and persistence of contact hypersensitivity (co-authors: Dorota Różycka, P.W. Askenase, R.K. Gershon), „Journal of Experimental Medicine”, 151, 1980;
• Antigen-specific T contrassupressor factor in cell-mediated immunity: intereractions leading to eradication of the tolerant state (co-authors: M. Bereta, Maria Ptak, R.K. Gershon, D. R. Green), „Journal of Immunology”, 133, 1984;
• Immune or normal gamma-delta T cels that assist alpha beta T cell in elicitation of contact sensitivity preferentially use Vγ5 and Vδ4 variable region gene segments (co-authors: M. Szczepanik, R. Ramabhadran, P.W. Askenase), „Journal of Immunology”, 156, 1996.