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麻风查菌在MDT中占有重要位置。我们用方差法估计各个涂膜BI的符合情况,证明基层检验人员的读片结果令人满意。此法可作考核镜检质量的方法之一。从十二个县抽取皮肤涂片12张(3张阴性、9张阳性),其中1张有5个涂膜,其余有4个,共49个涂膜。由地州实验室主管技师和检验士各l人读片,同时集中基层检验员8人(其中7人从事检验工作10年以上,1人工作2年)用进口显微镜,按Ridley方法计数BI,然后进行比较,用方差评价各涂膜的BI符合率。 1991年总共复查全州85张涂片,平均BI符合率为92％;其中共有360个涂膜,BI符合率为80％,误差占18%。从中抽取涂片12张,供8人检验,结果BI阴性符合率为87.5％,阳性符合率为68％,平均BI符合率为77.8％。以方差估计各涂膜BI的符合情况见下表。
Leprosy bacteria in MDT occupies an important position. We use the variance method to estimate the conformity of each coating BI and prove that the inspection results of the grass-roots inspectors are satisfactory. This method can be used for examining one of the quality of microscopy. A total of 12 skin smears (3 negative, 9 positive) were taken from 12 counties. One of them had 5 coated films and the remaining 4 had a total of 49 coated films. By the prefectural laboratory technicians and inspectors each l people read the film, while the concentration of grassroots inspectors 8 (of which 7 were engaged in the inspection of more than 10 years, 1 work 2 years) with imported microscopes, according to Ridley count BI, Then the comparison was made and the BI coincidence rate of each coating film was evaluated by variance. A total of 85 Quanzhou smears were reviewed in 1991 with an average BI coincidence rate of 92%. There were 360 coating films with a BI coincidence rate of 80% and an error of 18%. Twelve smears were taken for 8 tests. The results showed that the BI negative coincidence rate was 87.5%, the positive coincidence rate was 68% and the average BI coincidence rate was 77.8%. The variance is used to estimate the conformity of each coating BI as shown in the following table.