This study is a double-blind randomized controlled superiority trial aiming at providing evidence on the efficacy and safety of co-administered moxidectin and albendazole versus albendazole monotherapy (standard of care) against whipworm (T. trichiura) infections in adolescents and adults (12-60 years) in Côte d'Ivoire. One arm of patients will be treated with albendazole-ivermectin. As measure of efficacy of the treatment the cure rate (percentage of egg-positive subjects at baseline who become egg-negative after treatment) will be determined 14-21 days post-treatment.
This study is a double-blind randomized clinical trial which aims at providing evidence on the efficacy and safety of co-administered moxidectin and albendazole versus albendazole monotherapy (standard of care) against T. trichiura infections in adolescents and adults (12-60 years) in Côte d'Ivoire. Additionally, this study aims to substantiate evidence on the efficacy and safety of co-administered ivermectin and albendazole compared to albendazole monotherapy against T. trichiura in the same age group. The primary objective of the trial is to comparatively assess the efficacy in terms of cure rate (CR) against T. trichiura infections among adolescents and adults (aged 12 to 60 years) of moxidectin/albendazole combination therapy and albendazole monotherapy. The secondary objectives of the trial are to compare the egg reduction rates (ERR) of these treatment regimens (moxidectin/albendazole combination therapy vs. albendazole monotherapy) against T. trichiura, to assess the CRs and ERRs in T. trichiura-infected participants given ivermectin/albendazole combination therapy compared to those given albendazole monotherapy, to determine the CRs and ERRs of the drugs in study participants co-infected with A. lumbricoides and hookworm, and to evaluate the safety and tolerability of the treatment regimens. In addition, this study aims to characterize population pharmacokinetics and drug-drug interactions of the study drugs albendazole and ivermectin in T. trichiura infected adolescents (aged 12 to 20 years), to evaluate pharmacogenomics of ivermectin using whole genome sequencing, and to assess the effect of the gut microbiota on pharmacokinetics parameters and treatment outcome (CRs and ERRs), and drug-specific off-target effects of anthelmintic treatment on gut microbial communities in post-treatment samples. After obtaining informed consent from individual/parents and/or caregivers, the medical history of the participants will be assessed with a standardized questionnaire, in addition to a clinical examination carried out by the study physician before treatment. Enrollment will be based on two stool samples, which will be collected, if possible, on two consecutive days or otherwise within a maximum of 5 days. All stool samples will be examined with duplicated Kato-Katz thick smears by experienced laboratory technicians. Randomization of participants into the three treatment arms will be stratified according to intensity of infection. All participants will be interviewed before treatment, 3 and 24 hours and 14-21 days after treatment about the occurrence of adverse events. The efficacy of the treatment will be determined 14-21 days post-treatment by collecting another two stool samples. The primary analysis will include all participants with primary end point data (available case analysis). Supplementary, a per-protocol analysis will be conducted. CRs will be calculated as the percentage of egg-positive subjects at baseline who become egg-negative after treatment. Differences among CRs between treatment arms will be analysed using crude and adjusted logistic regression modeling (adjustment for age, sex and weight). Geometric and arithmetic mean egg counts will be calculated for the different treatment arms before and after treatment to assess the corresponding ERRs. Bootstrap resampling method with 5,000 replicates will be used to calculate 95% confidence intervals (CIs) for differences in ERRs.
Tablets of 2 mg moxidectin
Tablets of 400 mg albendazole
Tablets of 3 mg ivermectin
Centre Suisse de Recherches Scientifiques en Côte d'Ivoire (CSRS)
Abidjan, Côte d’Ivoire
Cure Rate (CR) of Moxidectin/Albendazole Combination Therapy Compared to Albendazole Monotherapy Against T. Trichiura
The CR will be calculated as the proportion of participants converting from being egg positive pre-treatment to egg negative post-treatment, multiplied by 100.
Time frame: 14-21 days after treatment
Egg Reduction Rate (ERR) of Moxidectin/Albendazole Combination Therapy Compared to Albendazole Monotherapy Against T. Trichiura
Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.
Time frame: 14-21 days after treatment
Cure Rate (CR) of Ivermectin/Albendazole Combination Therapy Compared to Albendazole Monotherapy Against T. Trichiura
The CR will be calculated as the proportion of participants converting from being egg positive pre-treatment to egg negative post-treatment, multiplied by 100.
Time frame: 14-21 days after treatment
Egg Reduction Rate (ERR) of Ivermectin/Albendazole Combination Therapy Compared to Albendazole Monotherapy Against T. Trichiura
Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the two treatment arms before and after treatment to assess the corresponding ERRs.
Time frame: 14-21 days after treatment
Cure Rates (CRs) of the Study Drugs Against Ascaris Lumbricoides Infections in Co-infected Participants
The CR will be calculated as the proportion of participants converting from being egg positive pre-treatment to egg negative post-treatment, multiplied by 100.
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Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
255
Time frame: 14-21 days after treatment
Egg Reduction Rates (ERRs) of the Study Drugs Against Ascaris Lumbricoides Infections in Co-infected Participants
Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the three treatment arms before and after treatment to assess the corresponding ERRs.
Time frame: 14-21 days after treatment
Cure Rates (CRs) of the Study Drugs Against Hookworm Infections in Co-infected Participants
The CR will be calculated as the proportion of participants converting from being egg positive pre-treatment to egg negative post-treatment, multiplied by 100.
Time frame: 14-21 days after treatment
Egg Reduction Rates (ERRs) of the Study Drugs Against Hookworm Infections in Co-infected Participants
Eggs per gram of stool (EPG) will be assessed by adding up the egg counts from the quadruplicate Kato-Katz thick smears and multiplying this number by a factor of six. Geometric and arithmetic mean egg counts will be calculated for the three treatment arms before and after treatment to assess the corresponding ERRs.
Time frame: 14-21 days after treatment
Number of Participants Reporting Adverse Events (AEs)
Participants will be monitored at the site for 3 hours following treatment for any acute AEs and reassessment will be done at 24h post-treatment. In addition, participants will be interviewed 3 and 24 hours after treatment and retrospectively at days 14-21 about the occurrence of AEs.
Time frame: 3 hours, 24 hours and 14-21 days after treatment