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目的了解医院食堂椭圆食粉螨孳生情况并进行形态学观察。方法用直接镜检法分离某医院食堂采集的蔬菜、面粉、大米及地脚粉,光镜下观察对椭圆食粉螨螨的形态特征。结果共采集标本20份,19份检出椭圆食粉螨,检出率为95.0%。共检获粉螨2 047只,平均孳生密度为10.24只/g。光镜下见椭圆食粉螨雄性成螨前足体板呈长方形,两侧略凹,表面具刻点;基节上毛呈叶状,两侧缘具较多长而直的梳状突起;刚毛均呈且具小栉齿,短刚毛末端常有分叉且有时尖端扭曲;足短粗,尖端渐细,末端圆钝;生殖褶和生殖感觉器淡黄色,阳茎为直管状,阳茎的支架挺直,后端分叉。肛后毛3对。雌性成螨形态与雄螨相似,但肛毛为4对。结论该医院食堂椭圆食粉螨孳生严重,应采取有效防制措施防止或减少粉螨孳生,以减少粉螨污染带来的危害。
Objective To understand the breeding conditions of oval mites in hospital canteens and to observe the morphology. Methods The vegetables, flour, rice and ground powder collected from a hospital canteen were isolated by direct microscopic examination. Morphological characteristics of ovoid mites were observed under light microscope. Results A total of 20 specimens were collected, 19 eggs were detected operon, the detection rate was 95.0%. A total of 2 047 acaroid mites were seized, with an average breeding density of 10.24 / g. Light microscope, see Ellipsoid mites male adult mite anterior pectoral plate rectangular, slightly concave on both sides, the surface is carved; base on the hair was leafy, both sides of the edge with more long and straight comb-like protrusions; bristles Short and thick, tip tapering, obtuse terminal; reproductive plethora and reproductive sensory yellow, the stem is straight tube, the stem of the male Bracket upright, back-end fork. Anal hair 3 pairs. Female adult mite morphology and male mites similar, but the anal hair is 4 pairs. Conclusion The omeletopharyngeal acaroid mite breeding in the hospital canteen is serious. Effective prevention and control measures should be taken to prevent or reduce the occurrence of acaroid mites in order to reduce the harm caused by powder mite pollution.