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dc.creatorPacheco, MA
dc.creatorLopez-Perez, M
dc.creatorVallejo, AF
dc.creatorHerrera, S
dc.creatorArévalo-Herrera, M
dc.creatorEscalante, AA
dc.date.accessioned2021-01-29T16:49:23Z
dc.date.available2021-01-29T16:49:23Z
dc.date.issued2016-01-11
dc.identifier.issn1935-2727
dc.identifier.issn1935-2735
dc.identifier.doihttp://dx.doi.org/10.34944/dspace/5134
dc.identifier.other26751811 (pubmed)
dc.identifier.urihttp://hdl.handle.net/20.500.12613/5152
dc.description.abstract© 2016 Pacheco et al. Background: Multiplicity of infection (MOI) refers to the average number of distinct parasite genotypes concurrently infecting a patient. Although several studies have reported on MOI and the frequency of multiclonal infections in Plasmodium falciparum, there is limited data on Plasmodium vivax. Here, MOI and the frequency of multiclonal infections were studied in areas from South America where P. vivax and P. falciparum can be compared. Methodology/Principal Findings: As part of a passive surveillance study, 1,328 positive malaria patients were recruited between 2011 and 2013 in low transmission areas from Colombia. Of those, there were only 38 P. vivax and 24 P. falciparum clinically complicated cases scattered throughout the time of the study. Samples from uncomplicated cases were matched in time and location with the complicated cases in order to compare the circulating genotypes for these two categories. A total of 92 P. vivax and 57 P. falciparum uncomplicated cases were randomly subsampled. All samples were genotyped by using neutral microsatellites. Plasmodium vivax showed more multiclonal infections (47.7%) than P. falciparum (14.8%). Population genetics and haplotype network analyses did not detect differences in the circulating genotypes between complicated and uncomplicated cases in each parasite. However, a Fisher exact test yielded a significant association between having multiclonal P. vivax infections and complicated malaria. No association was found for P. falciparum infections. Conclusion: The association between multiclonal infections and disease severity in P. vivax is consistent with previous observations made in rodent malaria. The contrasting pattern between P. vivax and P. falciparum could be explained, at least in part, by the fact that P. vivax infections have lineages that were more distantly related among them than in the case of the P. falciparum multiclonal infections. Future research should address the possible role that acquired immunity and exposure may have on multiclonal infections and their association with disease severity.
dc.format.extente0004355-e0004355
dc.language.isoen
dc.relation.haspartPLoS Neglected Tropical Diseases
dc.relation.isreferencedbyPublic Library of Science (PLoS)
dc.rightsCC BY
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectAdolescent
dc.subjectAdult
dc.subjectAged
dc.subjectChild
dc.subjectChild, Preschool
dc.subjectColombia
dc.subjectFemale
dc.subjectGenotype
dc.subjectHumans
dc.subjectMalaria, Falciparum
dc.subjectMalaria, Vivax
dc.subjectMale
dc.subjectMiddle Aged
dc.subjectPlasmodium falciparum
dc.subjectPlasmodium vivax
dc.subjectPopulation Surveillance
dc.subjectYoung Adult
dc.titleMultiplicity of Infection and Disease Severity in Plasmodium vivax
dc.typeArticle
dc.type.genreJournal Article
dc.relation.doi10.1371/journal.pntd.0004355
dc.ada.noteFor Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu
dc.date.updated2021-01-29T16:49:18Z
refterms.dateFOA2021-01-29T16:49:24Z


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