On January 2005, an indirect contact method to test the susecptibility of flea in rat was conducted in the plague laboratory Nongkojajar Health Center, Pasuruan regency. This study was aimed to know the sppropriateness of a gadget to test the susceptibility of fleas in rats. The result show that the gadget can be used to examine the susceptibility of fleas on rats toward insecticide. Domestic f…