Soil-transmitted helminths (STH) are intestinal worms that infect 24% of the world's population. Stopping the spread of STH is difficult, as the eggs are resilient (can withstand high pH) and persistent (can remain viable in soils for several years). To ensure that new sanitation systems can inactivate STH, a better understanding of their resilience is required. This study assessed the inactivation of Ascaris eggs under various conditions, in terms of moisture content (MC) (<20 to >90%), temperature (20–50 °C) and pH (7–12.5). The results highlight that the exposure of Ascaris eggs to elevated pH (10.5–12.5) at temperatures ≤27.5 °C for >70 days had no effect on egg viability. Compounding effects of alkaline pH (≥10.5) or decreasing MC (<20%) was observed at 35 °C, with pH having more of an effect than decreasing MC. To accelerate the inactivation of STH, an increase in the treatment temperature is more effective than pH increase. Alkaline pH alone did not inactivate the eggs but can enhance the effect of ammonia, which is likely to be present in organic wastes.

土壤传播的蠕虫（STH）是肠蠕虫，感染了世界24％的人口。阻止STH的传播是困难的，因为卵具有弹性（可以承受高pH值）并且具有持久性（可以在土壤中存活数年）。为了确保新的卫生系统可以使STH失活，需要对其弹性有更好的了解。本研究评估的失活蛔虫鸡蛋在各种条件下，在水分含量（MC）（<20至> 90％），温度（20-50℃）和pH（7-12.5）条款。结果突显of虫的曝光鸡蛋在≤27.5°C的温度下升高pH值（10.5–12.5）超过70天，对鸡蛋生存能力没有影响。在35°C时观察到碱性pH值（≥10.5）或MC降低（<20％）的复合效果，pH值比MC降低更具效果。为了加速STH的失活，提高处理温度比提高pH更有效。单独的碱性pH值并不能使卵灭活，但可以增强氨的作用，而氨很可能存在于有机废物中。