scholarly journals Artemisinin exposure at the ring or trophozoite stage impacts Plasmodium falciparum sexual conversion differently

eLife ◽  
2020 ◽  
Vol 9 ◽  
Author(s):  
Harvie P Portugaliza ◽  
Shinya Miyazaki ◽  
Fiona JA Geurten ◽  
Christopher Pell ◽  
Anna Rosanas-Urgell ◽  
...  
Keyword(s):  
Public Health ◽  
Plasmodium Falciparum ◽  
Complex Relationship ◽  
Trophozoite Stage ◽  
Fourfold Increase ◽  
Conversion Rates ◽  
Multiplication Cycle ◽  
The Impact ◽  
Gametocytocidal Activity ◽  
Potential Public Health

Malaria transmission is dependent on the formation of gametocytes in the human blood. The sexual conversion rate, the proportion of asexual parasites that convert into gametocytes at each multiplication cycle, is variable and reflects the relative parasite investment between transmission and maintaining the infection. The impact of environmental factors such as drugs on sexual conversion rates is not well understood. We developed a robust assay using gametocyte-reporter parasite lines to accurately measure the impact of drugs on sexual conversion rates, independently from their gametocytocidal activity. We found that exposure to subcurative doses of the frontline antimalarial drug dihydroartemisinin (DHA) at the trophozoite stage resulted in a ~ fourfold increase in sexual conversion. In contrast, no increase was observed when ring stages were exposed or in cultures in which sexual conversion was stimulated by choline depletion. Our results reveal a complex relationship between antimalarial drugs and sexual conversion, with potential public health implications.

scholarly journals Exposure to artemisinin at the trophozoite stage increases sexual conversion rates in the malaria parasite Plasmodium falciparum

2020 ◽  
Author(s):  
Harvie P. Portugaliza ◽  
Shinya Miyazaki ◽  
Fiona J.A. Geurten ◽  
Christopher Pell ◽  
Anna Rosanas-Urgell ◽  
...  
Keyword(s):  
Malaria Parasite ◽  
Fold Increase ◽  
Trophozoite Stage ◽  
Conversion Rates ◽  
Multiplication Cycle ◽  
Parasite Plasmodium ◽  
Parasite Plasmodium Falciparum ◽  
The Impact ◽  
Gametocytocidal Activity ◽  
Potential Public Health

ABSTRACTMalaria transmission is dependent on formation of gametocytes in the human blood. The sexual conversion rate, the proportion of asexual parasites that convert into gametocytes at each multiplication cycle, is variable and reflects the relative parasite investment between transmission and maintaining the infection. The impact of environmental factors such as drugs on sexual conversion rates is not well understood. We developed a robust assay using gametocyte-reporter parasite lines to accurately measure the impact of drugs on conversion rates, independently from their gametocytocidal activity. We found that exposure to subcurative doses of the frontline antimalarial drug dihydroartemisinin (DHA) at the trophozoite stage resulted in a ~4-fold increase in sexual conversion. In contrast, no increase was observed when ring stages were exposed or in cultures in which sexual conversion was stimulated by choline depletion. Our results reveal a complex relationship between antimalarial drugs and sexual conversion, with potential public health implications.

scholarly journals Reporter lines based on the gexp02 promoter enable early quantification of sexual conversion rates in the malaria parasite Plasmodium falciparum

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Harvie P. Portugaliza ◽  
Oriol Llorà-Batlle ◽  
Anna Rosanas-Urgell ◽  
Alfred Cortés
Keyword(s):  
Plasmodium Falciparum ◽  
Accurate Determination ◽  
Epidemiological Studies ◽  
Fluorescent Reporter ◽  
Conversion Rates ◽  
Parasite Plasmodium ◽  
Parasite Plasmodium Falciparum ◽  
Transgenic Lines ◽  
Parasite Replication ◽  
The Impact

Abstract Transmission of malaria parasites from humans to mosquito vectors requires that some asexual parasites differentiate into sexual forms termed gametocytes. The balance between proliferation in the same host and conversion into transmission forms can be altered by the conditions of the environment. The ability to accurately measure the rate of sexual conversion under different conditions is essential for research addressing the mechanisms underlying sexual conversion, and to assess the impact of environmental factors. Here we describe new Plasmodium falciparum transgenic lines with genome-integrated constructs in which a fluorescent reporter is expressed under the control of the promoter of the gexp02 gene. Using these parasite lines, we developed a sexual conversion assay that shortens considerably the time needed for an accurate determination of sexual conversion rates, and dispenses the need to add chemicals to inhibit parasite replication. Furthermore, we demonstrate that gexp02 is expressed specifically in sexual parasites, with expression starting as early as the sexual ring stage, which makes it a candidate marker for circulating sexual rings in epidemiological studies.

DAMPAK PENGELOLAAN SAMPAH PADA KESEHATAN MASYARAKAT DI TPA

2019 ◽  
Vol 5 (2) ◽  
Author(s):  
Emilda Emilda
Keyword(s):  
Public Health ◽  
Hand Hygiene ◽  
Waste Management ◽  
Qualitative Data ◽  
Water Storage ◽  
Health Impact ◽  
Clean Water ◽  
The People ◽  
Clean Environment ◽  
The Impact

The limitations of waste management in the Cipayung Landfill (TPA) causing a buildup of garbage up to more than 30 meters. This condition has a health impact on people in Cipayung Village. This study aims to analyze the impact of waste management at Cipayung Landfill on public health in Cipayung Village, Depok City. The research is descriptive qualitative. Data obtained by purposive sampling. Data was collected by interviews, observation and documentation. Based on interviews with 30 respondents, it was found that the most common diseases were diarrhea, then other types of stomach ailments, subsequent itching on the skin and coughing. This is presumably because the environmental conditions in the form of unhealthy air and water and clean and healthy living behaviors (PHBS) have not become the habit of the people. The results indicated that there were no respondents who had implemented all of these criteria. In general respondents have implemented  3 criteria, namely maintaining hair hygiene, maintaining skin cleanliness, and maintaining hand hygiene. While maintaining clean water storage is the most often overlooked behavior. To minimize this health impact, improvements in waste management in Cipayung landfill are needed along with continuous socialization and education to develop PHBS habits and the importance of maintaining a clean environment.

Exploring the World Trade Organisation's Trade and Environment/Public Health Jurisprudence as a Model for Incorporating a Trade–Labour Linkage into the Organisation's Multilateral Trade Regime: Should African Countries Accept a Policy Shift?

2017 ◽  
Vol 25 (1) ◽  
pp. 47-65
Author(s):  
Tapiwa V. Warikandwa ◽  
Patrick C. Osode
Keyword(s):  
Public Health ◽  
Developing Countries ◽  
World Trade ◽  
African Countries ◽  
Trade Regime ◽  
Multilateral Trade ◽  
Appellate Body ◽  
The World ◽  
Labour Standards ◽  
The Impact

The incorporation of a trade-labour (standards) linkage into the multilateral trade regime of the World Trade Organisation (WTO) has been persistently opposed by developing countries, including those in Africa, on the grounds that it has the potential to weaken their competitive advantage. For that reason, low levels of compliance with core labour standards have been viewed as acceptable by African countries. However, with the impact of WTO agreements growing increasingly broader and deeper for the weaker and vulnerable economies of developing countries, the jurisprudence developed by the WTO Panels and Appellate Body regarding a trade-environment/public health linkage has the potential to address the concerns of developing countries regarding the potential negative effects of a trade-labour linkage. This article argues that the pertinent WTO Panel and Appellate Body decisions could advance the prospects of establishing a linkage of global trade participation to labour standards without any harm befalling developing countries.

HUBUNGAN PEMBERIAN ASI EKSKLUSIF DENGAN KEJADIAN STUNTING PADA BALITA USIA 1-5 TAHUN DIPUSKESMAS SUKAHENING KECAMATAN SUKAHENING KABUPATEN TASIKMALAYA

2020 ◽  
Vol 13 (2) ◽  
pp. 109
Author(s):  
Yuyun Sarinengsih
Keyword(s):  
Public Health ◽  
Health Center ◽  
Exclusive Breastfeeding ◽  
Growth Failure ◽  
Sampling Technique ◽  
Not Given ◽  
Chi Square ◽  
Cross Sectional ◽  
Public Health Center ◽  
The Impact

ABSTRAKStunting yaitu keadaan gagal tumbuh akibat dari kekurangan gizi kronis. Prevalensi stunting di Kabupaten Tasikmalaya menempati urutan keempat, dimana kecamatan Sukahening menempati urutan pertama tertinggi dengan jumlah 155 balita mengalami stunting. Faktor yang dapat mempengaruhi kejadian stunting yaitu pengasuhan anak yang kurang baik dimana tidak diberikannya ASI secara Ekslusif. Pencegahan stunting yaitu pada 1000 hari kehidupan dimana salah satunya pemberian ASI secara Ekslusif.Penelitian ini bertujuan untuk mengetahui hubungan antara pemberian ASI Ekslusif dengan kejadian stunting pada balita 1-5 tahun di Puskesmas Sukahening Kecamatan Sukahening Kabupaten Tasikmalaya.Jenis Penelitian yang digunakan adalah deskriptif korelasional dengan pendekatan cross-sectional. Populasi total sampling sebanyak 95 responden menggunakan teknik purposive sampling.Hasil Penelitian diperoleh lebih dari setengah responden 51,6% tidak diberikan ASI secara Ekslusif, dan sebagian besar 65,3% balita mengalami stunting. Hasil perhitungan chi-square diperoleh ρ.value (0,000<0,05) maka H0 ditolak sehingga terdapat hubungan antara Pemberian ASI Ekslusif dengan kejadian stunting pada balita 1-5 tahun di Puskesmas Sukahening Kecamatan Sukahening Kabupaten Tasikmalaya.Hasil penelitian ini diharapkan dapat memberi informasi yang bermanfaat dan perlu dilakukan pendidikan kesehatan ulang yang terjadwal terkait nutrisi yang terjangkau dan sehat sehingga dapat meningkatkan cakupan ASI Ekslusif dan dapat menurunkan angka stunting.Kata Kunci : ASI Ekslusif, StuntingDaftar Pustaka : 25 buku (2010-2018)9 jurnal (2013-2019)2 Website (2010-2017) ABSTRACTStunting is a condition of growth failure due to chronic malnutrition. The stunting prevalence in Tasikmalaya Regency was at the fourth place where Sukahening sub-district was at the highest with 155 stunting. Factor that can influence the occurrence of stunting is a poor parenting where exclusive breastfeeding is not given. The best prevention of stunting is on 1000 days of life where exclusive breastfeeding is given. The impact, if the baby is not given exclusive breastfeeding, they will lack of nutrition and also will have an impact on the growth or inappropriate height. This aims of the research is to determine the relationship between exclusive breastfeeding and the incidence of stunting on toddler under 5 years of at Sukahening Public Health Center, Sukahening Sub district, Tasikmalaya Regency. The type of research used is descriptive correlation with a cross-sectional approach. The total samplings were 95 respondents which used purposive sampling technique. The results of the research were obtained more than half of the respondents 51.6% were given exclusive breastfeeding, and most 65.3% of children under five had stunting. The chi-square calculation results obtained that ρ.value (0,000 <0,05) then H0 is rejected so that there is a relationship between exclusive breastfeeding and the incidence of stunting on toddlers under 5 years in Sukahening Public Health Center, Sukahening Sub district, Tasikmalaya Regency. Performed the health education related to affordable and healthy nutrition so that it can increase the coverage of exclusive breastfeeding and can reduce stunting rates. Keywords : Exclusive breastfeeding, Stunting Bibliography : 25 books (2010-2018) 9 journals (2013-2019) 2 Websites (2010-2017) 

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