scholarly journals Dengue virus infection changes Aedes aegypti oviposition olfactory preferences

2018 ◽  
Author(s):  
Julie Gaburro ◽  
Prasad N Paradkar ◽  
Melissa Klein ◽  
Asim Bhatti ◽  
Saeid Nahavandi ◽  
...  
Keyword(s):  
Virus Infection ◽  
Aedes Aegypti ◽  
Dengue Virus ◽  
Dengue Infection ◽  
Olfactory Learning ◽  
Larval Rearing ◽  
Dengue Virus Infection ◽  
Infected Female ◽  
The Central Nervous System ◽  
Olfactory Preferences

AbstractAedes aegypti mosquitoes, main vectors for numerous flaviviruses, have olfactory preferences and are capable of olfactory learning especially when seeking their required environmental conditions to lay their eggs. In this study, we showed that semiochemical conditions during Aedes aegypti larval rearing affected future female choice for oviposition: water-reared mosquitoes preferred to lay eggs in water or p-cresol containers, while skatole reared mosquitoes preferred skatole sites. Using two independent behavioural assays, we showed that this skatole preference was lost in mosquitoes infected with dengue virus. Viral RNA was extracted from infected female mosquito heads, and an increase of virus load was detected from 3 to 10 days post infection, indicating replication in the insect head and possibly in the central nervous system. Expression of selected genes, potentially implied in olfactory learning processes, were also altered during dengue infection. Based on these results, we hypothesise that dengue virus infection alters gene expression in the mosquito’s head and is associated with a loss of olfactory preferences, possibly modifying oviposition site choice of female mosquitoes.

scholarly journals Dengue virus infection changes Aedes aegypti oviposition olfactory preferences

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Julie Gaburro ◽  
Prasad N. Paradkar ◽  
Melissa Klein ◽  
Asim Bhatti ◽  
Saeid Nahavandi ◽  
...  
Keyword(s):  
Virus Infection ◽  
Aedes Aegypti ◽  
Dengue Virus ◽  
Dengue Virus Infection ◽  
Olfactory Preferences

scholarly journals Molecular determinants of dengue virus infection in Aedes aegypti midgut

2019 ◽  
Vol 1 (10) ◽  
Author(s):  
Tanamas Siriphanitchakorn ◽  
Milly M. Choy ◽  
Wy Ching Ng ◽  
Dorothy Ng ◽  
Hwee Cheng Tan ◽  
...  
Keyword(s):  
Virus Infection ◽  
Aedes Aegypti ◽  
Dengue Virus ◽  
Dengue Virus Infection ◽  
Molecular Determinants

scholarly journals NS-1 antigen positive Dengue Infection and molecular characterization of Dengue Viruses in a private Medical College Hospitalin Dhaka, Bangladesh

2018 ◽  
Vol 17 (4) ◽  
pp. 669-673
Author(s):  
Mahmuda Siddiqua ◽  
Ahmed Nawsher Alam ◽  
AKM Muraduzzaman ◽  
Tahmina Shirin
Keyword(s):  
Virus Infection ◽  
Dengue Virus ◽  
Dengue Infection ◽  
Medical Science ◽  
Cost Effective ◽  
Rt Pcr ◽  
Dengue Virus Infection ◽  
Medical College ◽  
Virus Serotype ◽  
Ns1 Antigen

Introduction: Detection of dengue virus infection as soon as possible is critical for management of dengue virus infected patients. Immuno-chromatographic (ICT) tests are easy, cost effective method for dengue virus antigen detection.The sensitivity and specificity of ICT should compare with a gold standard test like RT-PCR. Aim of this study was to compare two test methods (ICT and RT-PCR), observe dengue serotype and seasonal impact on dengue infection.Methodology & result: The patients of Ibn Sina Medical College Hospital from October 2015 to October 2017 were tested for dengue NS1 antigen by ICT method. Out of 3201 sample tested 32.39% were found positive and 89 of which were re-tested for RT-PCR for comparison. Eighty eight of 89 NS1 positive cases showed positive by RT-PCR method giving an accuracy of 98.87%. Among the RT-PCR positive cases 45 were further analyzed for serotype. DEN-1, DEN-2 or both DEN- 1 and DEN-2 were found in 21, 23 and 1cases respectively. No cases of DEN-3 or DEN-4 were detected.Conclusion: This study showed that easily available and cost effective dengue NS1 antigen detection method (ICT) is as effective as molecular test (RT-PCR). DEN-1 and DEN-2 serotype were prevalent during last few years in Bangladesh. Continuous monitoring of dengue virus serotype is important for prevention and control of sudden epidemic by other serotype. Alert to be more during post monsoon when the peak of dengue virus infection was observed.Bangladesh Journal of Medical Science Vol.17(4) 2018 p.669-673

A SPATIAL CLUSTERING APPROACH TO IDENTIFY RISK AREAS OF DENGUE INFECTION AFTER INSECTICIDE SPRAYING

2016 ◽  
Vol 78 (5-3) ◽  
Author(s):  
Napadol Sudsom ◽  
Suwich Thammapalo ◽  
Theerakamol Pengsakul ◽  
Kuaanan Techato
Keyword(s):  
Virus Infection ◽  
Dengue Virus ◽  
Spatial Clustering ◽  
Dengue Infection ◽  
Spatial Association ◽  
Dengue Vector ◽  
Dengue Virus Infection ◽  
Spatial Analyst ◽  
Risk Areas ◽  
Clustering Approach

This study aims to demonstrate a spatial clustering approach for identifying risk households of dengue virus infection during the period of insecticide spraying-ultra low volume (ULV). All households located within 100 m radius of spraying area were recorded with geographic coordinates and divide into three groups of spraying (unsprayed, only outdoor and indoor plus outdoor sprayed house). A total of 45 households with geographic coordinates, were randomly selected to monitor ovitrap index, the percentage of positive ovitraps and the number of eggs per trap, in pre- and post-ULV spraying. Application of spatial analyst tools and spatial statistics tools in ArcGIS 10.1 were used to determine mosquito density and identify risk households using ovitrap index. The prediction maps of Aedes aegypti vector abundance were illustrated by kriging technique. Base on the results, the cluster of Ae. aegypti populations were detected on four day after the spraying. This finding shows the significant spatial pattern of dengue vector populations which may cause high risk areas of dengue virus infection after insecticide treatment. This methodological framework could be used for improving the strategy of dengue vector and outbreak control. The spatial association between dengue vector and the coverage of space spraying requires further study.

scholarly journals The relationship between entomological indicators of Aedes aegypti abundance and dengue virus infection

2017 ◽  
Vol 11 (3) ◽  
pp. e0005429 ◽  
Author(s):  
Elizabeth A. Cromwell ◽  
Steven T. Stoddard ◽  
Christopher M. Barker ◽  
Annelies Van Rie ◽  
William B. Messer ◽  
...  
Keyword(s):  
Virus Infection ◽  
Aedes Aegypti ◽  
Dengue Virus ◽  
Dengue Virus Infection ◽  
The Relationship

Neonate with haemophagocytic lymphohistiocytosis secondary to dengue infection: a case report

2016 ◽  
Vol 47 (3) ◽  
pp. 253-255 ◽  
Author(s):  
MV Krithika ◽  
Prakash Amboiram ◽  
Sneha M Latha ◽  
Binu Ninan ◽  
Febe Renjitha Suman ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Case Report ◽  
Virus Infection ◽  
Dengue Virus ◽  
Dengue Infection ◽  
Haemophagocytic Lymphohistiocytosis ◽  
Dengue Virus Infection ◽  
The Third ◽  
First Case

We report the first case of haemophagocytic lymphohistiocytosis (HLH) in a neonate secondary to primary Dengue virus infection. This neonate presented in the third week of life with fever, shock and hepatosplenomegaly and was diagnosed to have Dengue infection by serology and HLH was confirmed on bone marrow.

scholarly journals Aedes aegypti salivary protein “aegyptin” co-inoculation modulates dengue virus infection in the vertebrate host

Virology ◽  
2014 ◽  
Vol 468-470 ◽  
pp. 133-139 ◽  
Author(s):  
M.K. McCracken ◽  
R.C. Christofferson ◽  
B.J. Grasperge ◽  
E. Calvo ◽  
D.M. Chisenhall ◽  
...  
Keyword(s):  
Virus Infection ◽  
Aedes Aegypti ◽  
Dengue Virus ◽  
Salivary Protein ◽  
Vertebrate Host ◽  
Dengue Virus Infection

Effects of Ascogregarina culicis (Eugregarinorida: Lecudinidae) on Mosquito Size and Dengue Virus Infection in Aedes aegypti (Diptera: Culicidae)

2020 ◽  
Author(s):  
Panpim Thongsripong ◽  
Dawn M Wesson
Keyword(s):  
Virus Infection ◽  
Aedes Aegypti ◽  
Dengue Virus ◽  
Infection Rate ◽  
Wing Length ◽  
The Body ◽  
Global Public Health ◽  
Dengue Virus Infection ◽  
Significant Difference ◽  
The Impact

Abstract Dengue virus infection, transmitted via mosquito bites, poses a substantial risk to global public health. Studies suggest that the mosquito’s microbial community can profoundly influence vector-borne pathogen transmissions, including dengue virus. Ascogregarina culicis (Ross) of the phylum Apicomplexa is among the most common parasites of Aedes aegypti (Linnaeus), the principal vector of dengue. Despite a high prevalence worldwide, including in the areas where dengue is endemic, the impact of A. culicis on Ae. aegypti vector competence for dengue virus is unknown. This study aimed to investigate the effects of A. culicis infection on mosquito size and fitness, as measured by wing length, and the susceptibility to dengue virus infection in Ae. aegypti. Our results showed that there was no statistically significant difference in wing lengths between Ae. aegypti infected and not infected with A. culicis. Furthermore, A. culicis infection did not significantly affect dengue virus infection or disseminated infection rate. However, there was a significant association between shorter wings and higher dengue virus infection rate, whereby a 0.1-mm increase in wing length decreased the odds of the mosquito being infected by 32%. Thus, based on our result, A. culicis infection does not influence the body size and dengue virus infection in Ae. aegypti. This study helps to shed light on a common but neglected eukaryotic mosquito parasite.

Impact of Dengue Virus Infection on Feeding Behavior of Aedes aegypti

1997 ◽  
Vol 57 (2) ◽  
pp. 119-125 ◽  
Author(s):  
Kenneth B. Platt ◽  
Kriangkrai Lerdthusnee ◽  
Kenneth J. Linthicum ◽  
Khin S. A. Myint ◽  
David W. Vaughn ◽  
...  
Keyword(s):  
Virus Infection ◽  
Aedes Aegypti ◽  
Dengue Virus ◽  
Feeding Behavior ◽  
Dengue Virus Infection
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