{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,3]],"date-time":"2026-11-03T11:04:24Z","timestamp":1793703864741,"version":"4.5.1"},"reference-count":39,"publisher":"JMIR Publications Inc.","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JMIR Public Health Surveill"],"abstract":"Abstract<\/jats:title>\n \n Background<\/jats:title>\n India is committed to malaria elimination by the year 2030. According to the classification of malaria endemicity, the National Capital Territory of Delhi falls under category 1, with an annual parasite incidence of <1, and was targeted for elimination by 2022. Among others, population movement across states is one of the key challenges for malaria control, as it can result in imported malaria, thus introducing local transmission in an area nearing elimination.<\/jats:p>\n <\/jats:sec>\n \n Objective<\/jats:title>\n \n This descriptive study attempts to assess the contribution of such imported\n Plasmodium vivax<\/jats:italic>\n cases to the malaria burden in South West Delhi (SWD).\n <\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n \n A cross-sectional study was carried out at the fever clinic of the Indian Council of Medical Research-National Institute of Malaria Research in SWD from January 2017 to December 2019. Demographic and travel history data were recorded for all\n P vivax<\/jats:italic>\n confirmed malaria cases diagnosed at the fever clinic. Vector and fever surveys along with reactive case detection were conducted in SWD and Bulandshahr district of Uttar Pradesh, 1 of the 6 geographical sources for a high number of imported malaria cases.\n <\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n A total of 355\n P vivax<\/jats:italic>\n malaria cases were reported during the study period. The proportion of imported cases was 63% (n=222). Of these, 96% (n=213) of cases were from Uttar Pradesh. The distribution of malaria cases revealed that imported cases were significantly associated with travel during the transmission season compared with that in the nontransmission season. Entomological and fever surveys and reactive case detection carried out in areas visited by imported\n P vivax<\/jats:italic>\n malaria cases showed the presence of adults and larvae of\n Anopheles<\/jats:italic>\n species and\n P vivax<\/jats:italic>\n parasitemia.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusions<\/jats:title>\n \n Population movement is a key challenge for malaria elimination. Although additional\n P vivax<\/jats:italic>\n infections and vector mosquitoes were detected at places visited by the imported malaria cases, the inability to detect the parasite in mosquitoes and the possibility of relapses associated with\n P vivax<\/jats:italic>\n limit the significance of malaria associated with the travel. However, there remains a need to address migration malaria to prevent the introduction and re-establishment of malaria in areas with very low or 0 indigenous cases.\n <\/jats:p>\n <\/jats:sec>","DOI":"10.2196\/50058","type":"journal-article","created":{"date-parts":[[2025,1,9]],"date-time":"2025-01-09T00:56:29Z","timestamp":1736384189000},"page":"e50058-e50058","source":"Crossref","is-referenced-by-count":4,"title":["Contribution of Travelers to\n Plasmodium Vivax<\/i>\n Malaria in South West Delhi, India: Cross-Sectional Survey"],"prefix":"10.2196","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-6824-6373","authenticated-orcid":false,"given":"Deepali","family":"Savargaonkar","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-1507-3447","authenticated-orcid":false,"given":"Bina","family":"Srivastava","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7531-6307","authenticated-orcid":false,"given":"Chander Prakash","family":"Yadav","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4336-4413","authenticated-orcid":false,"given":"Mrigendra Pal","family":"Singh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8455-6054","authenticated-orcid":false,"given":"Anup","family":"Anvikar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3305-0034","authenticated-orcid":false,"given":"Amit","family":"Sharma","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7682-651X","authenticated-orcid":false,"given":"Himmat","family":"Singh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1900-7686","authenticated-orcid":false,"given":"Abhinav","family":"Sinha","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1010","published-online":{"date-parts":[[2025,1,8]]},"reference":[{"key":"R1","unstructured":"World malaria report 2022. 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