scholarly journals Novel Genetic and Molecular Tools for the Investigation and Control of Dengue Virus Transmission by Mosquitoes

2014 ◽  
Vol 1 (1) ◽  
pp. 21-31 ◽  
Author(s):  
Alexander W. E. Franz ◽  
Rollie J. Clem ◽  
A. Lorena Passarelli
Keyword(s):  
Dengue Virus ◽  
Virus Transmission ◽  
Molecular Tools ◽  
And Control

scholarly journals TRANSMISI TRANSOVARIAL VIRUS DENGUE PADA NYAMUKAEDES SPP.

2013 ◽  
Vol 5 (1) ◽  
Author(s):  
Angle M. H. Sorisi
Keyword(s):  
Dengue Virus ◽  
Vertical Transmission ◽  
Dengue Hemorrhagic Fever ◽  
Virus Transmission ◽  
Hemorrhagic Fever ◽  
Health Problems ◽  
Transovarial Transmission ◽  
Blood Sucking ◽  
Endemic Areas ◽  
And Control

Abstract: Dengue Hemorrhagic Fever (DHF) is one of the most serious health problems in Indonesia which often causes outbreaks with numerous deaths. The disease is transmitted byAedes sp.females. Generally, dengue virus transmission occurs horizontally from human carriers, and the dengue viruses are passed on bytheir vectors through blood sucking activity. After propagation in the mosquito, the viruses are transmitted to human recipients. In addition, there is a vertical transmission (transovarial) of dengue virusesin the ova of Aedes sp.females. The viruses propagate in the ova that undergo  metamorphosis to become larvae, pupae, and imagoes. The transovarial transmission of dengue virusesin its vectors in endemic areas could be a causative key which is responsible for the phenomenon of increasing cases of DHF. Any effort to prevent and control DHF requires a thorough understanding about virDen transmission, including this transovarial transmission in Aedes spfemales. Keywords: DHF, transovarial transmission, Aedes sp.     Abstrak: Penyakit Demam Berdarah Dengue (DBD) merupakan salah satu masalah kesehatan yang semakin serius di Indonesia dan sering menimbulkan suatu Kejadian Luar Biasa (KLB) dengan jumlah kematian tinggi. Penyakit ditularkan melalui Aedes sp.betina. Transmisi virus dengue umumnya terjadi secara horizontal, yaitu dari manusia pembawa virus dengue ke nyamuk vektor Aedes sp. melalui aktivitasnya mengisap darahSetelah mengalami propagasi  dalam  tubuh nyamuk, virus dengue ditularkan ke  manusia penerima. Selain itu, transmisi virus dapat terjadi secara vertikal (transovarial) yaitu virus dengue dalam tubuh nyamuk vektorAedes sp. betinake ovum, kemudian berpropagasi dalam ovum, larva, pupa, dan imago. Transmisi transovarial virus dengueke vektornya di daerah endemik bisa menjadi kunci penyebab yang bertanggung jawab terhadap fenomena peningkatan kasus deman berdarah dengue. Upaya pencegahan dan penanggulangan DBD memerlukan pengetahuan yang matang tentang adanya infeksi transovarial virDen pada nyamuk Aedes sp. Kata kunci : DBD, transmisi transovarial,  Aedes sp.

Dengue and the introduction of mosquito-transmitted viruses into Australia

2016 ◽  
Vol 37 (4) ◽  
pp. 167
Author(s):  
Andrew F van den Hurk
Keyword(s):  
Aedes Aegypti ◽  
Dengue Virus ◽  
Virus Transmission ◽  
Current Situation ◽  
Mosquito Vector ◽  
And Control

Dengue virus outbreaks involving 100s of cases periodically occur in north Queensland, the area of Australia where the primary mosquito vector, Aedes aegypti, occurs. This article summarises the ecology, history, current situation and control of dengue virus transmission in Australia and examines the threat posed by newly emergent arboviruses, such as Zika and chikungunya viruses.

Geographical heterogeneity of dengue transmission in two villages in southern Vietnam

2009 ◽  
Vol 138 (4) ◽  
pp. 585-591 ◽  
Author(s):  
K. T. D. THAI ◽  
N. NAGELKERKE ◽  
H. L. PHUONG ◽  
T. T. T. NGA ◽  
P. T. GIAO ◽  
...  
Keyword(s):  
Dengue Virus ◽  
Virus Transmission ◽  
Null Distribution ◽  
Household Level ◽  
Geographical Heterogeneity ◽  
Asymptomatic Children ◽  
Dengue Transmission ◽  
Risk Areas ◽  
Serological Data ◽  
And Control

SUMMARYThis study was performed to test the hypothesis that there are ‘hotspots’, i.e. geographical heterogeneity, of dengue transmission. Data from two repeat serosurveys in two villages in Vietnam were used to identify incident infections and to relate these to prevalence at baseline and thus assess geographical heterogeneity, i.e. clustering, in dengue transmission. A total of 400 households were surveyed; serological data from 521 children at baseline and from 119 children at follow-up were included in a spatial analysis. Geographical heterogeneity of dengue transmission was explored using a permutation null distribution test. This showed for the first time evidence of clustering of dengue virus transmission at the household level in asymptomatic children. Risk areas could be identified by seroprevalence surveys combined with mapping. Control of dengue virus transmission could be supported by identification and control of hotspots.

Green peach aphid and potato leafroll virus: transmission and control

2020 ◽  
Author(s):  
R.A. Bagrov ◽  
◽  
V.I. Leunov
Keyword(s):  
Myzus Persicae ◽  
Green Peach Aphid ◽  
Virus Transmission ◽  
Potato Leafroll Virus ◽  
Factors Affecting ◽  
Potato Viruses ◽  
Tuber Necrosis ◽  
Aphid Vectors ◽  
Leafroll Virus ◽  
And Control

The mechanisms of transmission of potato viruses from plants to aphid vectors and from aphids to uninfected plants are described, including the example of the green peach aphid (Myzus persicae, GPA). Factors affecting the spreading of tuber necrosis and its manifestation on plants infected with potato leafroll virus (PLRV) are discussed. Recommendations for PLRV and GPA control in the field are given.

scholarly journals Dengue Virus Transmission from Donor to Recipient during Haploidentical Stem Cell Transplantation

IDCases ◽  
2021 ◽  
pp. e01220
Author(s):  
Anjali Yadav ◽  
Neha Rastogi ◽  
K. Upasana ◽  
Sunisha Arora ◽  
Dhwanee Thakkar ◽  
...  
Keyword(s):  
Stem Cell ◽  
Stem Cell Transplantation ◽  
Dengue Virus ◽  
Cell Transplantation ◽  
Virus Transmission ◽  
Haploidentical Stem Cell Transplantation

scholarly journals Simple mathematical models for controlling COVID-19 transmission through social distancing and community awareness

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Ahmed S. Elgazzar
Keyword(s):  
Mathematical Models ◽  
Virus Transmission ◽  
Small World ◽  
Vaccination Rate ◽  
The Novel ◽  
Social Distancing ◽  
Community Awareness ◽  
Sufficient Degree ◽  
And Control

Abstract The novel COVID-19 pandemic is a current, major global health threat. Up till now, there is no fully approved pharmacological treatment or a vaccine. Also, its origin is still mysterious. In this study, simple mathematical models were employed to examine the dynamics of transmission and control of COVID-19 taking into consideration social distancing and community awareness. Both situations of homogeneous and nonhomogeneous population were considered. Based on the calculations, a sufficient degree of social distancing based on its reproductive ratio is found to be effective in controlling COVID-19, even in the absence of a vaccine. With a vaccine, social distancing minimizes the sufficient vaccination rate to control the disease. Community awareness also has a great impact in eradicating the virus transmission. The model is simulated on small-world networks and the role of social distancing in controlling the infection is explained.

scholarly journals Knowledge About Dengue Fever Prevention Among People Visiting Benazir Bhutto Hospital

2020 ◽  
Vol 24 (1) ◽  
pp. 23-26
Author(s):  
Tamanna Fayyaz ◽  
Maria Yasin ◽  
Ahsan Tariq ◽  
Aashi Mughal ◽  
Mujtaba Haider Bukhari ◽  
...  
Keyword(s):  
Dengue Virus ◽  
Dengue Fever ◽  
Public Awareness ◽  
Virus Transmission ◽  
Cross Sectional Study ◽  
Ethical Review ◽  
Health Campaigns ◽  
Cross Sectional ◽  
High Knowledge ◽  
Public Health Campaigns

Background: The higher incidence of dengue fever in Pakistan demands additional efforts in order to limit the disease. Despite active public health campaigns, low public awareness is one of the factors facilitating dengue virus transmission. For effective preventive measures, the assessment of the knowledge gap and then taking appropriate steps to fill the gap is required.The objective of this study is to assess knowledge about dengue fever prevention among people visiting Benazir Bhutto Hospital, Rawalpindi.Methods: The descriptive cross-sectional study of 6 months duration was conducted with 280 participants selected via nonprobability convenience sampling. After informed consent, an interview was conducted based on a questionnaire that assessed socio-demographic parameters and knowledge about dengue virus transmission and prevention. Data were analyzed through SPSS v. 22. The study was approved by the Ethical Review Board (ERB) of Rawalpindi Medical University and Allied hospitals.Results: Out of 280 respondents, 54.6% were males and 45.4% females and the mean age was 35.0 ± 13.1 years. The respondents having high knowledge scores were 66(23.6%) while those having moderate and low scores were 159 (56.8%) and 55 (19.6%) respectively. Educated respondents (p=0.03) and urban residents (p=0.05) had higher knowledge scores.Conclusion: The majority of the participants know about dengue fever. However, only one out of every four respondents has good knowledge scores for dengue fever prevention.

scholarly journals House-to-house human movement drives dengue virus transmission

2012 ◽  
Vol 110 (3) ◽  
pp. 994-999 ◽  
Author(s):  
S. T. Stoddard ◽  
B. M. Forshey ◽  
A. C. Morrison ◽  
V. A. Paz-Soldan ◽  
G. M. Vazquez-Prokopec ◽  
...  
Keyword(s):  
Dengue Virus ◽  
Virus Transmission ◽  
Human Movement
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