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Updated: May 6, 2026
A Multi-detection Assay for Malaria Transmitting Mosquitoes
Published on: February 28, 2015
Genotyping of MSP3β gene in Indian Plasmodium vivax
Purva Gupta1, Veena Pande, Alex Eapen
1National Institute of Malaria Research, New Delhi, India.
Background & Objectives:
The search for effective polymorphic markers in Plasmodium vivax is highly demanding to understand its transmission in a population. Due to the limited knowledge existing for P. vivax, the search for polymorphic markers for population studies is ongoing. The MSP gene family of Plasmodia has been linked with immune evasion. To study the circulating parasite population P. vivax merozoite surface protein 3β (PvMSP3β) polymorphic marker was used to investigate the genetic diversity of P. vivax in natural infections.
Methods:
Polymorphism of PvMSP3β gene was determined in 46 P. vivax blood samples from six different regions of India by polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) with PstI.
Results:
Two different parasite genotypes, viz. type-A and type-B were detected among 46 samples that were positive for PCR, based on the size of the amplification. RFLP analysis with PstI showed 22 allelic groups and 15.2% samples revealed mixed infections on analysis.
Conclusion:
PvMSP3β was found to be an effective molecular marker for P. vivax as it shows high diversity in India and multiple genotypes easily distinguishable without the need for sequencing.
Insights
The Plasmodium vivax merozoite surface protein 3β (PvMSP3β) gene is a highly diverse molecular marker in India. It effectively distinguishes multiple parasite genotypes, aiding population studies.
Area of Science:
- Molecular parasitology
- Population genetics
- Infectious disease epidemiology
Background:
- Understanding Plasmodium vivax transmission dynamics requires polymorphic markers.
- Limited genetic markers exist for P. vivax population studies.
- The merozoite surface protein (MSP) gene family is implicated in Plasmodium immune evasion.
Purpose of the Study:
- To investigate the genetic diversity of P. vivax in natural infections using the PvMSP3β gene.
- To assess PvMSP3β as a polymorphic marker for P. vivax population studies.
Main Methods:
- Polymorphism of the PvMSP3β gene was analyzed in 46 P. vivax blood samples from India.
- Polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP) with PstI were employed.
Main Results:
- Two distinct parasite genotypes (type-A and type-B) were identified.
- RFLP analysis revealed 22 allelic groups.
- Mixed infections were detected in 15.2% of samples.
Conclusions:
- PvMSP3β is an effective molecular marker for P. vivax.
- The marker demonstrates high genetic diversity in India.
- Multiple genotypes are easily distinguishable without sequencing.
