A total of 876 nets (229 Interceptor(®), 363 Olyset(®), and 284 PermaNet(®)) were collected 14 months post-distribution of long-lasting insecticidal nets (LLINs) from 811 households of internally displaced and host communities in Dar Sila District in eastern Chad to examine their physical condition. Holes were recorded by using three hole categories (average diameter = 2, 3.5, and 15 cm) and a Proportionate Hole Index (pHI). A total of 69.5% were in poor or very poor condition. There was no significant difference in the performance between the polyester 75 denier LLINs, but they had 4.22 times the odds of having a pHI ≥ 175 (poor or very poor condition) than polyethylene 150 denier LLINs; and 39.2% were unserviceable (pHI ≥ 300) compared with only 7.7% of the polyethylene LLINs. These results provide the first comparative data on LLIN material durability to guide procurement and replacement practice, and to inform urgently needed changes in LLIN international minimum specifications and product standards.

译文

:在分发了811个内部流离失所者和寄主家庭的持久杀虫网(LLIN)之后14个月,共收集了876个蚊帐(229个Interceptor(®),363个Olyset(®)和284个PermaNet(®))。乍得东部达西拉区的社区,以检查他们的身体状况。通过使用三种孔类别(平均直径= 2、3.5和15 cm)和比例孔指数(pHI)记录孔。共有69.5%的人口处于贫困或非常贫困状态。聚酯75旦LLIN的性能之间没有显着差异,但与聚乙烯150旦LLIN相比,它们的pHI≥175(差或非常差)的几率是4.22倍。仅有39.7%的聚乙烯LLIN不可用(pHI≥300),而只有7.7%的聚乙烯LLIN不可用。这些结果提供了有关LLIN材料耐用性的首个比较数据,以指导采购和更换实践,并为LLIN国际最低规格和产品标准提供了急需的变更信息。

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