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Vaccine. 2012 Mar 9;30(12):2116-24. doi: 10.1016/j.vaccine.2012.01.039. Epub 2012 Jan 27.

CD40 triggering induces strong cytotoxic T lymphocyte responses to heat-killed Staphylococcus aureus immunization in mice: a new vaccine strategy for staphylococcal mastitis.

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Laboratory of Cellular and Molecular Physiology, University of Liège, 1 Avenue de l'Hôpital (B34), Sart Tilman, Liège, B-4000, Belgium.


Staphylococcus (S.) aureus is a major pathogen involved in chronic bovine mastitis. Staphylococcal mastitis is difficult to control due to the ability of S. aureus to invade and survive within host cells. We therefore postulated that induction of CD8(+) cytotoxic T lymphocyte (CTL) responses leading to destruction of infected cells could help in the control of S. aureus mastitis. We demonstrate that immunization of mice with heat-killed S. aureus together with agonistic anti-CD40 monoclonal antibodies elicits strong CTL responses capable of reducing the severity of subsequent staphylococcal mastitis. Our study shows promise for CTL-dependent vaccination against S. aureus mastitis.

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