The north-east corridor of South Asia has regions with high level of P. falciparum, high levels of pathogenesis, and high levels of drug failures. In complete contrast, southern regions of India still carry predominantly P. vivax. In these regions malaria presentations appear more benign. Interestingly, profiles of malaria cases in central India are changing rapidly thus providing an extraordinary opportunity to study the factors that may be driving the evolution of malaria. The most obvious explanation for higher levels of P. falciparum in central India is that specific parasite strains are moving from """"""""source"""""""" sites (involving high levels of virulence) to new """"""""sink"""""""" sites, which historically presented more benign P. vivax infections. Another, more intriguing explanation is that the """"""""whole parasite"""""""" does not need to move;specific virulence traits, coded by specific genes, may propagate by recombination across regions. Local parasites that have acquired new virulence traits may compete more effectively against local P. vivax parasite populations. In order to investigate this, one general goal of Project 1 is to systematically and carefully define the population structures of P. falciparum and P. vivax in South Asia. A second general goal is to determine if detailed genotypic analysis of parasites allow us to correlate parasite genotypes to specific disease outcomes.
TO OVERALL APPLICATION: Project 1 will begin collecting samples in four sites across India: Mumbai, Goa, Wardha, and Ranchi. This epidemiology project is specifically designed to capture the history of parasite infection of individual patients and to share these parasites with other projects. Initial sampling at these sites will also serve to standardize data collection, distribution, and testing for all proiects in this grant. Following establishment ofthe initial field sites, the other projects will expand into other geographic regions throughout South Asia (India). Their deliberate stepwise expansion is necessary for high tech applications such as scaling whole genome analysis and phenotype screening techniques.
|Balabaskaran Nina, Praveen; Mohanty, Ajeet Kumar; Ballav, Shuvankar et al. (2017) Dynamics of Plasmodium vivax sporogony in wild Anopheles stephensi in a malaria-endemic region of Western India. Malar J 16:284|
|White 3rd, John; Mascarenhas, Anjali; Pereira, Ligia et al. (2016) In vitro adaptation of Plasmodium falciparum reveal variations in cultivability. Malar J 15:33|
|Hostetler, Jessica B; Lo, Eugenia; Kanjee, Usheer et al. (2016) Independent Origin and Global Distribution of Distinct Plasmodium vivax Duffy Binding Protein Gene Duplications. PLoS Negl Trop Dis 10:e0005091|
|Kumar, Ashwani; Hosmani, Rajeshwari; Jadhav, Shivaji et al. (2016) Anopheles subpictus carry human malaria parasites in an urban area of Western India and may facilitate perennial malaria transmission. Malar J 15:124|
|Kumar, Shiva; Mudeppa, Devaraja G; Sharma, Ambika et al. (2016) Distinct genomic architecture of Plasmodium falciparum populations from South Asia. Mol Biochem Parasitol 210:1-4|
|Bernabeu, Maria; Danziger, Samuel A; Avril, Marion et al. (2016) Severe adult malaria is associated with specific PfEMP1 adhesion types and high parasite biomass. Proc Natl Acad Sci U S A 113:E3270-9|
|Lim, Caeul; Pereira, Ligia; Saliba, Kathryn Shaw et al. (2016) Reticulocyte Preference and Stage Development of Plasmodium vivax Isolates. J Infect Dis 214:1081-4|
|Lim, Caeul; Pereira, Ligia; Shardul, Pritish et al. (2016) Improved light microscopy counting method for accurately counting Plasmodium parasitemia and reticulocytemia. Am J Hematol 91:852-5|
|Chery, Laura; Maki, Jennifer N; Mascarenhas, Anjali et al. (2016) Demographic and clinical profiles of Plasmodium falciparum and Plasmodium vivax patients at a tertiary care centre in southwestern India. Malar J 15:569|
|Guo, Suqin; He, Lishan; Tisch, Daniel J et al. (2016) Pilot testing of dipsticks as point-of-care assays for rapid diagnosis of poor-quality artemisinin drugs in endemic settings. Trop Med Health 44:15|
Showing the most recent 10 out of 37 publications