Parasite clearance following treatment with sulphadoxine-pyrimethamine for intermittent preventive treatment in Burkina-Faso and Mali: 42-day in vivo follow-up study

Coulibaly, Sheick O, Kayentao, Kassoum, Taylor, Steve, Guirou, Etienne A, Khairallah, Carole, Guindo, Nouhoun, Djimde, Moussa, Bationo, Richard, Soulama, Alamissa, Dabira, Edgar, Barry, Binta, Niangaly, Moussa, Diakite, Hammadoun, Konate, Sidiki, Keita, Mohamed, Traore, Boubacar, Meshnick, Steve R, Magnussen, Pascal, Doumbo, Ogobara K and terKuile, Feiko ORCID: https://orcid.org/0000-0003-3663-5617 (2014) 'Parasite clearance following treatment with sulphadoxine-pyrimethamine for intermittent preventive treatment in Burkina-Faso and Mali: 42-day in vivo follow-up study'. Malaria Journal, Vol 13, :41.

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Abstract

Background
Intermittent Preventive Treatment in pregnancy (IPTp) with sulphadoxine-pyrimethamine (SP) is widely used for the control of malaria in pregnancy in Africa. The emergence of resistance to SP is a concern requiring monitoring the effectiveness of SP for IPTp.

Methods
This was an in-vivo efficacy study to determine the parasitological treatment response and the duration of post-treatment prophylaxis among asymptomatic pregnant women receiving SP as part of IPTp in Mali and Burkina-Faso. The primary outcome was the PCR-unadjusted % of patients with parasites recurrence by day 42 defined as a positive diagnostic test by malaria smear at any visit between days 4 and 42. Treatment failure was based on the standard World Health Organization criteria. The therapeutic response was estimated using the Kaplan-Meier curve.

Results
A total of 580 women were enrolled in Mali (N=268) and Burkina-Faso (N=312) and followed weekly for 42 days. Among these, 94.3% completed the follow-up. The PCR-unadjusted cumulative risk of recurrence by day 42 was 4.9% overall, and 3.2% and 6.5% in Mali and Burkina Faso respectively (Hazard Ratio [HR] =2.14, 95%, CI [0.93-4.90]; P=0.070), and higher among the primi– and secundigravida (6.4%) than multigravida (2.2%, HR=3.01 [1.04-8.69]; P=0.042). The PCR-adjusted failure risk was 1.1% overall (Mali 0.8%, Burkina-Faso 1.4%). The frequencies (95% CI) of the dhfr double and triple mutant and dhps 437 and 540 alleles mutant genotype at enrolment were 24.2% (23.7-25.0), 4.7% (4.4-5.0), and 21.4% (20.8-22.0) and 0.37% (0.29-0.44) in Mali, and 7.1% (6.5-7.7), 44.9% (43.8-46.0) and 75.3% (74.5-76.2) and 0% in Burkina-Faso, respectively. There were no dhfr 164L or dhps 581G mutations.

Conclusion
SP remains effective at clearing existing infections when provided as IPTp to asymptomatic pregnant women in Mali and Burkina. Continued monitoring of IPTp-SP effectiveness, including of the impact on birth parameters in this region is essential.

Item Type:	Article
Subjects:	QW Microbiology and Immunology > QW 45 Microbial drug resistance. General or not elsewhere classified. WA Public Health > Health Problems of Special Population Groups > WA 395 Health in developing countries WC Communicable Diseases > Tropical and Parasitic Diseases > WC 750 Malaria WQ Obstetrics > Pregnancy Complications > WQ 256 Infectious diseases
Faculty: Department:	Clinical Sciences & International Health > Clinical Sciences Department
Digital Object Identifer (DOI):	https://doi.org/10.1186/1475-2875-13-41
Depositing User:	Martin Chapman
Date Deposited:	01 Apr 2014 15:43
Last Modified:	20 Jan 2021 13:22
URI:	https://archive.lstmed.ac.uk/id/eprint/3632

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