Effect of Albendazole and Ivermectin Dose on Wuchereria Bancrofti Microfilarial Clearance in Mali: A Randomized, Open Label Study
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 入组人数
- 1,000
- 试验地点
- 1
- 主要终点
- Wb microfilarial levels
研究概览
简要总结
This study, conducted in Mali, West Africa, will determine whether a new treatment regimen for lymphatic filariasis can eliminate the disease more quickly than the standard regimen. Lymphatic filariasis is caused by infection with very small filarial worms called Wuchereria bancrofti that are spread by mosquitoes. The disease can cause swelling of the arms, legs, breast and genitalia and can progress to permanent swelling of the legs or arms called elephantiasis. Currently, patients in Mali are treated with a single dose of 400 mg of albendazole plus two doses of 200 mcg/kg of ivermectin each year. This study will use a regimen of 800 mg of albendazole twice a year plus 200 mcg/kg of ivermectin twice a year for 2 years. The study will see if the new regimen is more effective in lowering the numbers of Wuchereria bancrofti in the blood and will examine the effects of the two treatments on the adult worms living in the lymph system.
Healthy people between 14 and 65 years of age who live in the Mali village of N'Tessoni and are infected with Wuchereria bancrofti may be eligible for this study. Candidates are screened with a medical history, a brief physical examination and blood tests to check for infection with Wuchereria bancrofti and to measure white blood cell counts.
Participants undergo the following procedures:
-First visit
Ultrasound examination to look for filarial worms in the body.
Random assignment to receive either standard treatment or the experimental regimen
Urine pregnancy test for women of child-bearing age.
Receive first treatment dose.
-6-month visit
Short history, physical examination and blood test.
Second treatment dose for subjects in experimental treatment group.
Urine pregnancy test for women of childbearing age.
-1-year visit
Short history, physical examination and blood test.
Second or third treatment dose, depending on treatment group.
Repeat ultrasound in subjects whose first ultrasound detected adult worms.
Urine pregnancy test for women of childbearing age.
-18-month visit
Short history, physical examination and blood test.
Fourth treatment dose for subjects in experimental treatment group.
Urine pregnancy test for women of childbearing age.
-24-month visit
Short history, physical examination and blood test.
Repeat ultrasound in subjects whose first ultrasound detected adult worms.
Urine pregnancy test for women of childbearing age.
详细描述
Albendazole and ivermectin are currently used in combination for annual mass treatment of lymphatic filariasis in Africa. Although the drugs have been donated, the cost of such programs is very high and has proven to be a major impediment to the success of programs in many countries with limited financial resources. Data from albendazole treatment of other filarial infections and one study comparing single to multi-dose DEC/albendazole in lymphatic filariasis suggest that increased dose and/or frequency of albendazole dosing may be more effective in clearing microfilariae. Furthermore, the optimal dose of ivermectin for the treatment of lymphatic filariasis is greater than that being used in the current mass treatment program. In this study, 50 volunteers with microfilaremic Wuchereria bancrofti infection will be randomized to receive standard annual therapy (albendazole 400 mg + ivermectin 150 mcg/kg) or semiannual therapy with an increased albendazole dose (albendazole 800 mg + ivermectin 400 mcg/kg). If adequate numbers of microfilaremic subjects are recruited, an additional 25 volunteers will receive annual therapy with the increased dose combination. Microfilarial levels, as well as measures of adult worm burden (circulating antigen, ultrasound identification of adult worm nests) will be followed every six months for three years to assess the effects of the treatments.
研究设计
- 研究类型
- Interventional
- 主要目的
- Treatment
入排标准
- 年龄范围
- 14 Years 至 65 Years（Child, Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- 未提供
排除标准
- 未提供
结局指标
主要结局
Wb microfilarial levels
时间窗: 12 months
次要结局
- Adult worm burden as assessed by circulating antigen levels and visualization of worm nests by ultrasound(12 months)