关键词: 病媒生物, 密度, 季节消长

Abstract: Objective To explore the dynamic status of rodents, mosquitoes and cockroaches in three areas of Yinchuan city from 2006 to 2010, providing a scientific basis for the prevention and control of vectors in Yinchuan city. Methods Night trapping and stick papers were used for the surveillance of rodents and cockroaches respectively throughout the year, with the surveillance of the density of mosquitoes and flies done with artificial and cage method from May to October. Results The densities of flies, mosquitoes and cockroaches in Yinchuan took on a single-peak curve, peaking in 2009, and the density decreased to a varying degree in 2010. The average density of rodents was 0.46%, with two peaks seen in March to May and September to October every year. The dominant species in the city was Rattus norvegicus, with Mus musculus prevailing in rural areas. The average density of mosquitoes was 2.87/per hour, peaking in July and August, Culex pipiens pallens dominant accounting for 92.90%; Anopheles sinensis and Cx. tritaeniorhynchus were increasing gradually, the peak density being in July and August. M. domestica, Lucilia and Sarcophagidae were dominant species. The density of cockroach was 1.66/per paper with an average invasion rate of 17.14%, the two peak curves seen in the periods from April to June and from September to November. Blattella germanica was the dominant species, accounting for 91.42%, with Periplaneta americana proportion increasing year by year. Conclusion The control of biological vectors in 2010 was effective, but it still needs to strengthen the control of vectors in peak seasons. R. norvegicus, Cx. pipiens pallens, M. domestica, Lucilia and Sarcophagidae, B. germanica are dominant species in Yinchuan, which will increase the risk of transmitting diseases associated with the vectors. Therefore, long-term monitoring, early warning and control of vectors and diseases transmitted by them should be strengthened.

Key words: Vectors, Density, Seasonal fluctuation