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The efficacy of chloroquine in treatment of vivax malaria in southern Laos

An assessment of the efficacy of oral chloroquine for the treatment of uncomplicated Plasmodium vivax malaria in Savannakhet Province, Lao People's Democratic Republic (PDR)

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN17027907
Enrollment
100
Registered
2008-01-23
Start date
2005-06-01
Completion date
Unknown
Last updated
2015-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Vivax malaria Infections and Infestations Malaria

Interventions

Oral chloroquine 25 mg base/kg over 3 days (10 mg base/kg stat, followed by 10 mg base/kg at 24 hours later, followed by 5 mg base/kg at 48 hours). Total duration of follow-up is 42 days.

Sponsors

University of Oxford (UK)
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Written informed consent from patient or attending relative 2. Age greater than 1 year old, either sex 3. P. vivax infection (greater than 500 asexual stages/µL) 4. Acute uncomplicated malaria (World Health Organization [WHO] 2000) 5. Axillary temperature greater than 37.5°C 6. No full course of antimalarial treatment in the previous 3 days 7. High probability that patient will be able to complete 42 days follow up

Exclusion criteria

Exclusion criteria: 1. Inability or unwillingness to give informed consent 2. Mixed species malaria infections 3. Severe malaria (WHO, 2000) 4. History of allergy to chloroquine 5. Asymptomatic malaria 6. Low probability of 42 days follow up

Design outcomes

Primary

MeasureTime frame
Cure rate. Outcomes measured daily until parasite clearance and then weekly until 42 days post treatment.

Secondary

MeasureTime frame
1. Parasite clearance time 2. Fever clearance time Outcomes measured daily until parasite clearance and then weekly until 42 days post treatment.

Countries

Laos

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026