7
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Molecular epidemiology of malaria parasite amongst patients in a displaced people’s camp in Sudan

      research-article

      Read this article at

      ScienceOpenPublisherPMC
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Background

          Despite the importance of epidemiological studies in the development of effective control strategies and provision of basic health services for refugees and internally displaced persons (IDPs), data on the prevalence of malaria are limited. Thus, this study was conducted to estimate the molecular prevalence of malaria amongst the displaced population in Ardamata IDP camp in Al-Geneina City, Sudan.

          Methods

          A cross-sectional study was conducted from July 2018 to December 2018 to estimate malaria prevalence amongst the displaced population in Ardamata IDP camp in Al-Geneina City, Sudan. A total of 380 patients with suspected malaria were recruited. Nested polymerase chain reaction (nPCR) assays were performed to detect the Plasmodium genus and species.

          Results

          Of 380 patients, 232 (61.1%) were positive for malaria. Plasmodium falciparum was the only prevalent species detected amongst the study population. nPCR analysis revealed that none of the samples had Plasmodium vivax, Plasmodium ovale or Plasmodium malariae. The malaria prevalence rate was higher amongst males (67.1%) than in females (56.8%), and gender was the only risk factor that was significantly associated with malaria infection ( p = .042).

          Conclusions

          Despite control programmes, malaria remains a significant cause of illness amongst a displaced population. The high prevalence of malaria infection in this study indicates that additional health facilities and control strategies should be implemented in displaced camps and the surrounding areas.

          Related collections

          Most cited references23

          • Record: found
          • Abstract: found
          • Article: not found

          A genus- and species-specific nested polymerase chain reaction malaria detection assay for epidemiologic studies.

          A nested polymerase chain reaction (PCR) assay that uses Plasmodium genus-specific primers for the initial PCR (nest 1) amplification and either genus- or species-specific primers for the nest 2 amplifications was tested on laboratory and field samples. With in vitro cultured Plasmodium falciparum-infected blood samples, it was capable of detecting six parasites/microl of blood using DNA prepared from 25-microl blood spots on filter paper. The assay was evaluated on fingerprick blood samples collected on filter paper from 129 individuals living in a malaria-endemic area in Malaysia. Malaria prevalence by genus-specific nested PCR was 35.6% (46 of 129) compared with 28.7% (37 of 129) by microscopy. The nested PCR detected seven more malaria samples than microscopy in the first round of microscopic examination, malaria in three microscopically negative samples, six double infections identified as single infections by microscopy and one triple infection identified as a double infection by microscopy. The nested PCR assay described is a sensitive technique for collecting accurate malaria epidemiologic data. When coupled with simple blood spot sampling, it is particularly useful for screening communities in remote regions of the world.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Detection of four Plasmodium species in blood from humans by 18S rRNA gene subunit-based and species-specific real-time PCR assays.

            There have been reports of increasing numbers of cases of malaria among migrants and travelers. Although microscopic examination of blood smears remains the "gold standard" in diagnosis, this method suffers from insufficient sensitivity and requires considerable expertise. To improve diagnosis, a multiplex real-time PCR was developed. One set of generic primers targeting a highly conserved region of the 18S rRNA gene of the genus Plasmodium was designed; the primer set was polymorphic enough internally to design four species-specific probes for P. falciparum, P. vivax, P. malarie, and P. ovale. Real-time PCR with species-specific probes detected one plasmid copy of P. falciparum, P. vivax, P. malariae, and P. ovale specifically. The same sensitivity was achieved for all species with real-time PCR with the 18S screening probe. Ninety-seven blood samples were investigated. For 66 of them (60 patients), microscopy and real-time PCR results were compared and had a crude agreement of 86% for the detection of plasmodia. Discordant results were reevaluated with clinical, molecular, and sequencing data to resolve them. All nine discordances between 18S screening PCR and microscopy were resolved in favor of the molecular method, as were eight of nine discordances at the species level for the species-specific PCR among the 31 samples positive by both methods. The other 31 blood samples were tested to monitor the antimalaria treatment in seven patients. The number of parasites measured by real-time PCR fell rapidly for six out of seven patients in parallel to parasitemia determined microscopically. This suggests a role of quantitative PCR for the monitoring of patients receiving antimalaria therapy.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Short report: Rapid DNA extraction from archive blood spots on filter paper for genotyping of Plasmodium falciparum.

              The practical advantages of sampling and storing blood on filter paper for analyses of human and pathogen genes highlight the need for reliable, sensitive, and cost-effective DNA extraction methods. We describe a new Tris-EDTA (TE) buffer-based method for extraction of DNA from blood dried on filter paper. The method was evaluated against the commonly used methanol and Chelex methods, regarding polymerase chain reaction detection of Plasmodium falciparum parasites from samples stored for 1-2 years. The sensitivity of detection was dependent on the parasite density and type of filter paper. For 3MM Whatman filter paper, the sensitivity was 100%, 73%, and 93% for the TE, methanol, and Chelex methods, respectively. For the longer stored 903 Schleicher & Schuell filter paper, the sensitivity was 93%, 73%, and 0%, respectively. This rapid, simple, and inexpensive extraction method generated superior results from archived specimens compared with the two standard methods and may represent a useful tool in molecular epidemiologic studies.
                Bookmark

                Author and article information

                Contributors
                Khalid541983@yahoo.com , khalidhaj@usm.my
                Journal
                Trop Med Health
                Trop Med Health
                Tropical Medicine and Health
                BioMed Central (London )
                1348-8945
                1349-4147
                29 January 2020
                29 January 2020
                2020
                : 48
                : 3
                Affiliations
                [1 ]GRID grid.442422.6, Department of Zoology, Faculty of Science and Technology, , Omdurman Islamic University, ; B.O.Box 382, Omdurman, Sudan
                [2 ]GRID grid.440839.2, Department of Haematology, Faculty of Medical Laboratory Sciences, , Al Neelain University, ; Khartoum, Sudan
                [3 ]ISNI 0000 0001 2294 3534, GRID grid.11875.3a, Unit of Biostatistics and Research Methodology, School of Medical Sciences, , Universiti Sains Malaysia, ; Health Campus, 16150 Kubang Kerian, Kelantan Malaysia
                [4 ]GRID grid.419299.e, Department of Molecular Epidemiology, Tropical Medicine Research Institute, , National Center for Research, ; Khartoum, Sudan
                [5 ]ISNI 0000 0001 2294 3534, GRID grid.11875.3a, Department of Medical Microbiology & Parasitology, School of Medical Sciences, , Universiti Sains Malaysia, ; 16150 Kubang Kerian, Kelantan Malaysia
                Author information
                http://orcid.org/0000-0002-1725-6702
                Article
                192
                10.1186/s41182-020-0192-3
                6988308
                31920458
                8a0fa9f9-d5e1-477c-adb0-e26fcbd27263
                © The Author(s) 2020

                Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License ( http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver ( http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

                History
                : 7 October 2019
                : 16 January 2020
                Funding
                Funded by: Commission of Scientific Research and Innovation, Ministry of Higher Education and Scientific Research, Sudan
                Award ID: SRIC/2017/RP761
                Award Recipient :
                Categories
                Research
                Custom metadata
                © The Author(s) 2020

                Medicine
                malaria,plasmodium,molecular epidemiology,displaced camp,sudan,nested pcr
                Medicine
                malaria, plasmodium, molecular epidemiology, displaced camp, sudan, nested pcr

                Comments

                Comment on this article