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Merozoite surface protein 1 of Plasmodium falciparum (PfMSP-1) is a leading malaria vaccine candidate. However, extensive genetic diversity of this gene in field isolates of P. falciparum represents a major obstacle for the development of an effective vaccine against malaria. The present study was aimed at analysing genetic polymorphisms of K1, MAD20 and RO33 allelic types of MSP-1 block 2 among P. falciparum isolates from Sistan and Baluchestan, Iran. In this study a total of 94 P. falciparum infected persons from Sistan and Baluchistan Province of Iran, were included. Blood samples were collected from March 2011 to September 2012. Block 2 of the MSP-1 gene was genotyped by allele-specific nested polymerase chain reaction (PCR) after DNA extraction. Eighty-nine (94.7%) of the 94 samples were successfully amplified; 7 distinct MSP-1 genotypes were identiï¬ï¿½ed by size differences on agarose gels. MAD20 was the predominant MSP-1 allelic family identified in 46.1% (41/89) of the samples while RO33 family had the least frequency (7.9%). A total of 9/89 (10.1%) samples exhibited multiple infections with two alleles at PfMSP-1. The present study shows that the level of genetic diversity is relatively low in south-east of Iran and most of infections are composed of one clone, which is consistent with an area of low malaria transmission. These data are useful for malaria prevention and control in Iran.
https://www.omicsonline.org/open-access/genetic-diversity-of-variable-region-block-in-the-merozoite-surface-protein-msp-in-plasmodium-falciparum-field-isolates-from-southeast-of-iran-2090-2778.1000124.php?aid=37131
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