The study on the histological structure ofRattus tanezumi liver infected by Leptospira spp was condueted. The purpose ofthis study was to determine the change ofhepar tissue structure of R. tanezumi due to the patogenikity ofLeptospira spp bacteria. The rats were collectedfrom Miroto region, Central Semarang District, Semarang Municlpality. R. tanezumi were caught and their hepar were taken, th…