scholarly journals Genetic diversity and population structure of Aedes aegypti after massive vector control for dengue fever prevention in Yunnan border areas

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Rui-chen Lv ◽  
Chang -qiang Zhu ◽  
Chun-hui Wang ◽  
Le-le Ai ◽  
Heng Lv ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Aedes Aegypti ◽  
Vector Control ◽  
Dengue Fever ◽  
Massive Vector ◽  
Border Areas

scholarly journals VULNERABILITY TEST OF Aedes aegypti LARVA AGAINST TEMEFOS IN WAY KANDIS, BANDAR LAMPUNG

2020 ◽  
Vol 7 (2) ◽  
pp. 73-78
Author(s):  
Nurul Hanifah ◽  
EMANTIS ROSA ◽  
Endah Seytaningrum
Keyword(s):  
Aedes Aegypti ◽  
Vector Control ◽  
Incidence Rate ◽  
Dengue Fever ◽  
Susceptibility Status

Aedes aegypti is a major vector of Dengue Fever (DHF) that is spread through mosquito bites. However, Bandar Lampung ranked 3rd out of 15 districts in Lampung Province with an IR (Incidence Rate) of 59.43. One way to reduce dengue cases is vector control. Temefos is commonly used as a chemical vector's control and it is possible can cause resistance to larvae. The information about Aedes Aegypty has not been widely known about larval of Aedes aegypty's susceptibility towards Temefos in Lampung Province. Therefore, this study aims to determine the susceptibility status of Aedes aegypti larvae towards Temefos in Way Kandis Village, Tanjung Senang Regency, Bandar Lampung. This research was conducted in December 2018 - February 2019. This study uses five different temefos concentrations, i.e ;0 mg / L concentration as control, 0.005 mg / L, 0.01 mg / L, 0.02 mg / L, and 0 , Each 03 mg / L was repeated in 4 times. Observations were made by calculating the number of larvae that fainted, died, and lived. The results show that the susceptibility of Aedes aegypti towards Temefos in Way Kandis Village, Tanjung Senang Regency, Bandar Lampung City, is categorized as susceptible in the concentration range of 0.005 - 0.03 mg / L.

scholarly journals Larvicidal activity of phytoextracts against dengue fever vector, Aedes aegypti - A review

2018 ◽  
Vol 5 (4) ◽  
pp. 167-174 ◽  
Author(s):  
Kalarikkal Venugopalan Lakshmi ◽  
Ambalaparambil Vasu Sudhikumar ◽  
Embalil Mathachan Aneesh
Keyword(s):  
Life Cycle ◽  
Aedes Aegypti ◽  
Vector Control ◽  
Dengue Fever ◽  
Inhibitory Action ◽  
Control Measures ◽  
Mosquito Vectors ◽  
Chemical Insecticide ◽  
Insecticide Application ◽  
Efficient Control

Since Aedes aegypti is considered as the major vector of dengue fever, development of strategies to accomplish improved vector control without much interference in the environment composition are more common. As phytochemicals are now in the run for achieving this goal, this review is a humble attempt to recognize the plant species and their larvicidal efficacy with their inhibitory action on the life cycle of the species of interest, that has been documented through various studies conducted till date. Here we also discuss the synergistic impact of a number of phytoextracts which will provide more efficient control measures for mosquito vectors. All these studies are an exploration for a risk-free vector control tactic to replace the current chemical insecticide application for the betterment of our nature.

scholarly journals The expanding pattern of Aedes aegypti in southern Yunnan, China: insights from microsatellite and mitochondrial DNA markers

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Pengbo Liu ◽  
Liang Lu ◽  
Jinyong Jiang ◽  
Yuhong Guo ◽  
Mingdong Yang ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Dengue Fever ◽  
Genetic Relationships ◽  
Natural Populations ◽  
Mitochondrial Genes ◽  
The Third ◽  
South West ◽  
Laboratory Populations ◽  
History Of ◽  
Border Areas

Abstract Background Aedes aegypti, the vector of dengue fever, was first reported in Yunnan in 2002. Now, this species is found in nine counties in border areas of south-west Yunnan. Related dengue fever outbreaks have been reported since 2013. The population genetics of Ae. aegypti in these areas were studied to explain the expansion history of this species. Methods Fifteen natural populations of Ae. aegypti were sampled from six counties of Yunnan, and two laboratory populations from Guangdong and Hainan were also included in this study. A total of 12 microsatellite loci and three mitochondrial genes were analysed. Results The results indicate that Ae. aegypti populations from Yunnan show similar genetic diversity. The 17 populations could be divided into three groups: the first group included populations from Longchuan, Ruili and Gengma, which are located in the southwest of Yunnan; the second group included populations from Jinghong and Menghai, in the south of Yunnan; and the third group included populations from Mengla and the two laboratory populations from Guangdong and Hainan. Both microsatellite and mtDNA data revealed that the genetic relationships of the populations corresponded to their geographic relationships. Conclusions The results suggested that the expansion of Ae. aegypti from northern Myanmar and Laos to southern and southwestern Yunnan was a natural process. The effect of human activity on expansion was not obvious. Surveillance efforts should still be focused on border areas where Ae. aegypti does not occur, and a powerful control strategy should be applied to prevent outbreaks of dengue fever.

scholarly journals Genetic diversity and population structure of Plasmodium falciparum in Kenyan–Ugandan border areas

2019 ◽  
Vol 24 (5) ◽  
pp. 647-656
Author(s):  
David Nderu ◽  
Francis Kimani ◽  
Evaline Karanja ◽  
Kelvin Thiong'o ◽  
Maureen Akinyi ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Plasmodium Falciparum ◽  
Population Structure ◽  
Border Areas

scholarly journals Effectiveness Test of Basil Leaf (Ocimum basilicum) Extract As Bioinsecticide In Mosquito Coil to Mosquito Aedes aegypti Death

2017 ◽  
Vol 3 (2) ◽  
pp. 6
Author(s):  
Indri Ramayanti ◽  
Kamalia Layal ◽  
Putri Utami Pratiwi
Keyword(s):  
Aedes Aegypti ◽  
Essential Oils ◽  
Vector Control ◽  
Dengue Fever ◽  
Leaf Extract ◽  
Positive Control ◽  
Negative Control ◽  
Ocimum Basilicum ◽  
Mosquito Coil ◽  
Active Compounds

Aedes aegypti is the vector of Dengue Haemorhagic fever. One of the method to prevent the spread of dengue fever is vector control. Principal activity to control this vector might decrease their population as transmitter of disease. One way of controlling mosquitoes vectors is using a bioinsecticide from basil leaf. Basil leaf extract has bioinsecticide effect to Aedes aegypti because basil leaf has some active compounds, such as Flavonoid, Saponin, Tannin and essential oils. These compound are toxic to mosquitoes. The purpose of this study was to determine the effectiveness of basil leaf (Ocimum basilicum L.) extract as mosquito coil against Aedes aegypti. The design of this study is xperimental study with 450 subjects of Aedes aegypti. Subjects were divided into six groups. They were 0% (negative control), 25%, 50%. 70%, 90% extract and Transfluthrin 0,03% (positive control). Each group contained 25 mosquitoes. Observation were carried out for 60 minutes with 10 minutes intervals and three times of repetition. The Data were analyzed by probit to calculate the value of Lethal consentration. The result of Probit Analyze showed that LC50 was at a concentration of 41,81% and LC90 was at concentration of 101.66%. The results showed that the extract of basil leaf (Ocimum basilicum L.) effective as Aedes aegypti bioinsecticide in mosquito coil.

PENGARUH PELATIHAN PENGENDALIAN VEKTOR DEMAM BERDARAH TERHADAP MAYA INDEX PADA SISWA SEKOLAH DASAR DI MAJALENGKA

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Wawan Kurniawan
Keyword(s):  
Vector Control ◽  
Dengue Fever ◽  
Dengue Hemorrhagic Fever ◽  
Intervention Group ◽  
Hemorrhagic Fever ◽  
Control Group ◽  
Control Group Design ◽  
Group Design ◽  
Quasi Experimental ◽  
Dengue Vector Control

ABSTRAK  Latar belakang: Demam Berdarah Dengue (DBD) disebabkan oleh virus Dengue dapat menyebabkan kematian. Pencegahan DBD yang dianggap paling tepat adalah Pemberantasan Sarang Nyamuk (PSN). Penelitian ini bertujuan untuk mengetahui pengaruh pelatihan pengendalian vektor Demam Berdarah pada siswa sekolah dasar terhadap Maya Index di Majalengka. Metode: Penelitian ini menggunakan desain quasi experiment (pretest-posttest control group design). Sebanyak 4 sekolah terpilih sebagai kelompok intervensi dan 4 sekolah lainnya sebagai kontrol. Subyek penelitian adalah siswa kelas IV-VI yang terdiri dari 171 siswa pada kelompok intervensi dan 163 pada kelompok kontrol. Instrumen yang digunakan adalah formulir pemantauan jentik berkala. Hasil: Jumlah rumah dengan kategori Maya Index tinggi berkurang dari 27,5% menjadi 9,4%. Terjadi penurunan angka BRI kategori tinggi pada kelompok intervensi dari 20,5% menjadi 1,8%. Pada kelompok kontrol tidak terjadi penurunan angka BRI kategori tinggi (22,1%), sebaliknya terjadi penurunan kategori rendah dari 34,4% menjadi 3,7%. Tidak terjadi penurunan angka HRI pada kelompok intervensi maupun kontrol. Kesimpulan: Pelatihan pengendalian vektor Demam Berdarah dapat menurunkan nilai BRI dan Maya Index, tetapi tidak berpengaruh terhadap nilai HRI. Tidak adanya perubahan nilai HRI menunjukkan bahwa kebersihan dan sanitasi lingkungan merupakan faktor yang berpengaruh terhadap probabilitas kejadian demam berdarah. Kata Kunci : Demam Berdarah, Maya Index, pelatihan, pengendalian vektor   ABSTRACT Background: Dengue Hemorrhagic Fever (DHF) caused by Dengue virus could cause death. The most appropriate prevention of Dengue is eradication of mosquito nests (PSN). This study aims to determine the effect of Dengue vector control training on elementary students towards Maya Index in Majalengka. Method: This study used quasi-experimental design (pretest-posttest control group design). A total of 4 schools were selected as intervention groups and 4 other schools as controls. The subjects were students in grades IV-VI consisting of 171 students in the intervention group and 163 in the control group. The instrument used was periodic larva monitoring form. Results: The number of houses with a high Maya Index category in the intervention group decreased from 27.5% to 9.4%. There was a decrease in the high BRI category in the intervention group from 20.5% to 1.8%. In the control group, there was no decrease in the high BRI category (22.1%), on the contrary, there was a decrease in the low category from 34.4% to 3.7%. There was no decrease in HRI rates both of intervention or control groups. Conclusion: Dengue Fever vector control training could decrease the value of BRI and Maya Index, but does not affect the value of HRI. The absence of changes in HRI  indicate that environmental hygiene and sanitation are factors that influence the probability of dengue fever occurrence. Keywords: Dengue Hemorrhagic Fever, Maya Index, training, vector control

Genetic diversity and population structure of Populus yunnanensis revealed by SSR markers

2020 ◽  
Vol 52 (6) ◽  
Author(s):  
Anpei Zhou ◽  
Dan Zong ◽  
Peihua Gan ◽  
Yao Zhang ◽  
Dan Li ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Ssr Markers
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