关键词: 纳氏皱皮螨；粉螨；地脚粉；检出率；孳生密度

Abstract: Objective To investigate the Suidasia nesbitti breeding status in the ground dust flour collected in Qiqihaer City. Methods Totally， 16 aliquots of ground dust flour were respectively collected from a college canteen and 15 households in Qiqihaer City. Then 10 g dust flour was taken from individual sample for isolation of the mites that were made of slide specimen， and the mites were identified and classified under a microscope. Results Acaroid mites were found in 15 of the 16 aliquots of samples（detection rate being 93.8％）， and 7 species， belonging to 6 genera under 3 families， were identified. A total of 561 heads of mites were isolated from 160 g samples， with an average breeding density of 3.51 heads/g. The most breeding mite was associated with S. nesbitti. Conclusions Various species of mites are breeding in the ground dust flour in Qiqihaer City， and S. nesbitti occurs the most. These findings indicate that effective measures should be taken to prevent and control the harm associated with acaroid mite contamination.

Key words: Suidasia nesbitti； Acaroid mite； Ground dust flour； Detection rate； Breeding density