Resistance of commensal rodents to anticoagulant rodenticide in Shanghai

Objective To investigate the resistance of commensal rodents to the first and the second anticoagulant rodenticide in Shanghai,and provide theoretical evidence for the use of rodenticide.Methods The experienta was done according to the method of feeding without selectivity proposed by national rodent resistance cooperation group.Results The resistance rate of Rattus tanezumi to warfarin was 8.22%,and resist-warfarin Rattus norvegicus and Mus musculus individual was not detected.The resistance rate of Rattus tanezumi to bromadiolone was 5.77%,resist-bromadiolone Rattus norvegicus and Mus musculus individual was not detected.The death times and lethal dose tended to the normal distribution after the house rat feed toxic baits.Conclusion The resistance of Rattus norvegicus to warfarin and bromadiolone tends to decline,but the resistance level of Rattus tanezumi has no change,and Mus musculus is still susceptible to two kinds of rodenticide.