<prompt> Panton-valentine leucocidin is seen in infection with-StreptococciStaphylococciGonococciPneumococci  <response>: Ans. is b i.e., Staphylococci . Staphylococcal leucocidin and gamma lysin have been grouped as synergohymenotropic toxins. Leucocidin is also called as Panton-valentine toxin. 