Related Experiment Video
Updated: Jul 24, 2026
10:27
Methods to Increase the Sensitivity of High Resolution Melting Single Nucleotide Polymorphism Genotyping in Malaria
Published on: November 10, 2015
11.8K
Malaria parasite population genomics during an elimination program in Eastern Myanmar
Biorxiv : the Preprint Server for Biology
|July 15, 2025
Summary
Genomic analysis of malaria parasites in Myanmar revealed localized transmission and a decrease in population size during an elimination program. Mass drug administration (MDA) proved effective, leading to the dominance of a single parasite genotype by 2020.
Area of Science:
- Population genomics
- Malaria elimination
- Parasite genetics
Background:
- Investigated Plasmodium falciparum parasite population genomics during an intensive malaria elimination program in Kayin State, Myanmar.
- Utilized malaria posts for rapid case detection and treatment, alongside mass drug administration (MDA) in areas with high submicroscopic parasite reservoirs.
Purpose of the Study:
- To examine the impact of malaria control efforts on parasite population structure using genomic data.
- To identify transmission chains and understand the scale of parasite subpopulations.
- To assess the efficacy of mass drug administration (MDA) through genomic evidence.
Main Methods:
- Collected 5014 dried blood spots from Plasmodium falciparum infected patients over 58 months (November 2015 - August 2020).
- Sequenced 2270 parasite genomes with geographic references.
- Analyzed identity-by-descent (IBD) relationships to infer population structure and transmission dynamics.
Main Results:
- Parasites were genetically depauperate, with localized and temporally stable transmission of unique genotypes observed.
- Parasite relatedness extended up to approximately 20 km, defining the scale of subpopulations.
- A single predominant parasite genotype (kelch13-R561H) emerged by 2020, indicating founder effects from MDA and potential genetic drift.
Conclusions:
- Genomic data demonstrated a decrease in parasite population size and regional distribution of genotypes, supporting the use of operational units for control.
- Genetic drift may play a more significant role than selection in low-transmission elimination settings.
- The rise of the kelch13-R561H genotype highlights the potential for rapid shifts in parasite population characteristics during elimination, necessitating future surveillance.
Related Concept Videos
00:58Symbiosis
Symbiotic relationships are long-term, close interactions between individuals of different species that affect the distribution and abundance of those species. When a relationship is beneficial to both species, this is called mutualism. When the relationship is beneficial to one species but neither beneficial nor harmful to the other species, this is called commensalism. When one organism is harmed to benefit another, the relationship is known as parasitism. These types of relationships often...
01:29Malaria
Malaria pathogenesis in humans reflects a delicate interplay between parasite biology and host response. Clinical illness reflects a host’s immune response to the parasite’s asexual replication cycle, which is often asymptomatic in individuals with partial immunity. From the parasite's perspective, transmission between mosquito and human with minimal host pathology is evolutionarily advantageous. Among the six Plasmodium species infecting humans, P. falciparum and P. vivax dominate in global...