Rat is a rodent (rodensia) which cannot be separated from parasitic organism attacks the ectoparasites (fleas). In the presence of fleas plague focus areas need to watch out, for no increase in cases of plague (outbreak). Pest is a zoonosis in rat that can be transmitted to humans through the bite of fleas Xenopsylla cheopsis containing Yersinia pestis. Boyolali District is one of the plague fo…