Study on the Seasonal Variation of Vector Fleas in Plague Epidemic Area,Shaanxi Provincial

Objective To know the species of vector fleas and their seasonal variation in plague epidemic area. Methods Investigate the species and the amount of the fleas at body, nest, hole of the Meriones unguiculatus and the indoor fleas month by month. Results Six species of fleas were found on the gerbil body and eleven species in nest, the Nosopsyllus laeviceps kuzenkovi is dominant species at both body and nest. Only one specie Archaeopsylla sinensis were found indoor. The amount of the fleas on gerbil body in spring and summer is far higher than in autumn and winter. The amount of the nest fleas show the double curve, the first apex in April and the second in November, the first apex is higher than the second. Conclusion The speciesand the amount of the fleas and the rule of vector flea seasonal variation in Shaanxi provincial plague epidemic area is different from in neighborhood province, the control of fleas ought to do in the spring and summer.