Objective To investigate the breeding status and diversity of acaroid mites in the ground dust flour in some areas of Xuzhou, Jiangsu province, China. Methods Ground dust flour was collected from steamed bun shops, pancake shops, and baked wheat cake shops in a food market in Xuzhou; acaroid mites were isolated from the samples via direct microscopy method and were made into slide specimens for mite species identification and statistical analysis. Results A total of 58 647 acaroid mites were detected from 460 grams of ground dust flour, which belonged to 9 species of 8 genera of 4 families. The dominant species was Tyrophagus putrescentiae. The mean breeding densities of acaroid mites in the ground dust flour of the steamed bun shops, pancake shops, and baked wheat cake shops were 151.70, 116.28, and 71.28 mites/g, respectively, and the mean breeding density was 127.49 mites/g. The species richness, species diversity, and species evenness were highest in the pancake shops, followed by the baked wheat cake shops and steamed bun shops; the species dominance was highest in the baked wheat cake shops, followed by the steamed bun shops and pancake shops; the species similarity of acaroid mites was relatively high between the two of the three sites. Conclusion The ground dust flour in Xuzhou is heavily infested with acaroid mites, which should be given enough attention. Meanwhile, prevention and control measures should be strengthened to reduce mite-induced risks to humans.
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