Which of the following is not correctly matched

Question

$\begin{array}{1 1}(A)\;\text{Dengue fever-Arbovirus}\\(B)\;\text{Plague-Yersinia pestis}\\(C)\;\text{Syphilis-Trichuris trichura}\\(D)\;\text{Sleeping sickness-Trypanosoma gambiens}\end{array}$