There are several protocols on DNA extraction of fleas infected with Yersinia pestis available in the scientific literature. A few examples are presented in the attached papers. I hope they are useful for you.
There are several protocols on DNA extraction. please try this protocol which are explained in this paper. link attached. this is easy and effective protocol. i hope this is helpful for you.
International Journal of Agriculture and Biology 07/2015; 17(4):809-814. DOI:10.17957/IJAB/14.0027