AI Article Synopsis
Article Abstract
Background: The emergence and spread of Plasmodium falciparum and Plasmodium vivax resistance to available anti-malarial drugs represents a major drawback in the control of malaria and its associated morbidity and mortality. The aim of this study was to evaluate the chemoresistance profile of P. falciparum and P. vivax to commonly used anti-plasmodial drugs in a malaria-endemic area in the Brazilian Amazon.
Methods: The study was carried out in Manaus (Amazonas state), in the Brazilian Amazon. A total of 88 P. falciparum and 178 P. vivax isolates was collected from 2004 to 2007. The sensitivity of P. falciparum isolates was determined to chloroquine, quinine, mefloquine and artesunate and the sensitivity of P. vivax isolates was determined to chloroquine and mefloquine, by using the colorimetric DELI test.
Results: As expected, a high prevalence of P. falciparum isolates resistant to chloroquine (78.1%) was observed. The prevalence of isolates with profile of resistance or decreased sensitivity for quinine, mefloquine and artesunate was 12.7, 21.2 and 11.7%, respectively. In the case of P. vivax, the prevalence of isolates with profile of resistance for chloroquine and mefloquine was 9.8 and 28%, respectively. No differences in the frequencies of isolates with profile of resistance or geometric mean IC50s were seen when comparing the data obtained in 2004, 2005, 2006 and 2007, for all tested anti-malarials.
Conclusions: The great majority of P. falciparum isolates in the Brazilian malaria-endemic area remain resistant to chloroquine, and the decreased sensitivity to quinine, mefloquine and artesunate observed in 10-20% of the isolates must be taken with concern, especially for artesunate. Plasmodium vivax isolates also showed a significant proportion of isolates with decreased sensitivity to chloroquine (first-line drug) and mainly to mefloquine. The data presented here also confirm the usefulness of the DELI test to generate results able to impact on public health policies.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3765867 | PMC |
| http://dx.doi.org/10.1186/1475-2875-12-281 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Analysis of Severe and Relapse Risks of Imported Malaria in Five Provinces of China.
Am J Trop Med Hyg
December 2024
Department of Epidemiology and Biostatistics, School of Public Health, Anhui Medical University, Hefei, China.
Although China has achieved malaria elimination certification, the risk of malaria transmission reintroduction due to imported malaria remains. We analyzed data on imported malaria cases collected from January 1, 2014 to December 31, 2021, using multivariable logistic regression analysis to identify the factors associated with severe and relapsing malaria. The odds of severe malaria were around 4-fold greater for patients who were initially diagnosed with a nonmalarial illness than for patients initially diagnosed with malaria.
View Article and Find Full Text PDFA spatial multiscale mathematical model of Plasmodium vivax transmission.
J Math Biol
December 2024
School of Mathematics and Statistics, The University of Melbourne, Parkville, Australia.
The epidemiological behavior of Plasmodium vivax malaria occurs across spatial scales including within-host, population, and metapopulation levels. On the within-host scale, P. vivax sporozoites inoculated in a host may form latent hypnozoites, the activation of which drives secondary infections and accounts for a large proportion of P.
View Article and Find Full Text PDFSuboptimal Doses of Antimalarials Relative to Increasing Body Weight and the Risk of Recurrence in the Republic of Korea Armed Forces, 2012-2021.
J Korean Med Sci
December 2024
Department of Internal Medicine, Hallym University Sacred Heart Hospital, Anyang, Korea.
Background: We aimed to analyze the epidemiology, clinical characteristics, and outcomes of malaria caused by among military members of the Republic of Korea (ROK).
Methods: We reviewed the medical records of patients diagnosed with malaria in 16 military hospitals in the ROK between 2012-2021, excluding other types of malaria, as well as imported cases and those treated in civilian hospitals.
Results: In total, 653 patients were treated for malaria.
Assessing tafenoquine implementation in Brazil: a qualitative evaluation of perceptions of healthcare providers and Plasmodium vivax patients (QualiTRuST Study).
Malar J
December 2024
Fundação de Medicina Tropical Dr Heitor Vieira Dourado, Manaus, Brazil.
Background: To eliminate malaria by 2035, Brazil must address Plasmodium vivax. Previously, first-line treatment was chloroquine plus 7-day primaquine (PQ) without glucose-6-phosphate dehydrogenase (G6PD) deficiency testing. In 2021, point-of-care quantitative G6PD testing and single-dose tafenoquine (TQ) were piloted in two municipalities.
View Article and Find Full Text PDFHost preference of Anopheles stephensi mosquitoes for blood feeding in south of Iran: Insights from Multiplex-PCR analysis.
Trop Med Int Health
December 2024
Department of Medical Entomology & Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
Background: The study aims to determine the host preference for blood feeding among potential hosts of Anopheles stephensi in Iran, using the Multiplex-PCR method. An. stephensi is the primary malaria vector in urban areas of South Asia and the Middle East, including southern Iran, where approximately 30.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!