scholarly journals Transmission of West Nile and five other temperate mosquito-borne viruses peaks at temperatures between 23°C and 26°C

eLife ◽  
2020 ◽  
Vol 9 ◽  
Author(s):  
Marta S Shocket ◽  
Anna B Verwillow ◽  
Mailo G Numazu ◽  
Hani Slamani ◽  
Jeremy M Cohen ◽  
...  
Keyword(s):  
Culex Pipiens ◽  
Rift Valley Fever ◽  
Summer Temperature ◽  
Temperature Dependent ◽  
West Nile ◽  
Valley Fever ◽  
Thermal Limits ◽  
Human West Nile Virus ◽  
Us Counties ◽  
Western Equine Encephalitis

The temperature-dependence of many important mosquito-borne diseases has never been quantified. These relationships are critical for understanding current distributions and predicting future shifts from climate change. We used trait-based models to characterize temperature-dependent transmission of 10 vector–pathogen pairs of mosquitoes (Culex pipiens, Cx. quinquefascsiatus, Cx. tarsalis, and others) and viruses (West Nile, Eastern and Western Equine Encephalitis, St. Louis Encephalitis, Sindbis, and Rift Valley Fever viruses), most with substantial transmission in temperate regions. Transmission is optimized at intermediate temperatures (23–26°C) and often has wider thermal breadths (due to cooler lower thermal limits) compared to pathogens with predominately tropical distributions (in previous studies). The incidence of human West Nile virus cases across US counties responded unimodally to average summer temperature and peaked at 24°C, matching model-predicted optima (24–25°C). Climate warming will likely shift transmission of these diseases, increasing it in cooler locations while decreasing it in warmer locations.

scholarly journals Transmission of West Nile and other temperate mosquito-borne viruses peaks at intermediate environmental temperatures

2019 ◽  
Author(s):  
Marta S. Shocket ◽  
Anna B. Verwillow ◽  
Mailo G. Numazu ◽  
Hani Slamani ◽  
Jeremy M. Cohen ◽  
...  
Keyword(s):  
Culex Pipiens ◽  
Rift Valley Fever ◽  
Summer Temperature ◽  
Temperature Dependent ◽  
West Nile ◽  
Valley Fever ◽  
Thermal Limits ◽  
Human West Nile Virus ◽  
Western Equine Encephalitis ◽  
Environmental Temperatures

ABSTRACTThe temperature-dependence of many important mosquito-borne diseases has never been quantified. These relationships are critical for understanding current distributions and predicting future shifts from climate change. We used trait-based models to characterize temperature-dependent transmission of 10 vector–pathogen pairs of mosquitoes (Culex pipiens, Cx. quinquefascsiatus, Cx. tarsalis, and others) and viruses (West Nile, Eastern and Western Equine Encephalitis, St. Louis Encephalitis, Sindbis, and Rift Valley Fever viruses), most with substantial transmission in temperate regions. Transmission is optimized at intermediate temperatures (23–26°C) and often has wider thermal breadths (due to cooler lower thermal limits) compared to pathogens with predominately tropical distributions (in previous studies). The incidence of human West Nile virus cases across US counties responded unimodally to average summer temperature and peaked at 24°C, matching model-predicted optima (24–25°C). Climate warming will likely shift transmission of these diseases, increasing it in cooler locations while decreasing it in warmer locations.

scholarly journals Culex pipiens, an Experimental Efficient Vector of West Nile and Rift Valley Fever Viruses in the Maghreb Region

PLoS ONE ◽  
2012 ◽  
Vol 7 (5) ◽  
pp. e36757 ◽  
Author(s):  
Fadila Amraoui ◽  
Ghazi Krida ◽  
Ali Bouattour ◽  
Adel Rhim ◽  
Jabeur Daaboub ◽  
...  
Keyword(s):  
Rift Valley ◽  
Culex Pipiens ◽  
Rift Valley Fever ◽  
West Nile ◽  
Valley Fever ◽  
Efficient Vector

scholarly journals Modeling the distribution of the West Nile and Rift Valley Fever vector Culex pipiens in arid and semi-arid regions of the Middle East and North Africa

2014 ◽  
Vol 7 (1) ◽  
pp. 289 ◽  
Author(s):  
Amy K Conley ◽  
Douglas O Fuller ◽  
Nabil Haddad ◽  
Ali N Hassan ◽  
Adel M Gad ◽  
...  
Keyword(s):  
Middle East ◽  
North Africa ◽  
Rift Valley ◽  
Culex Pipiens ◽  
Rift Valley Fever ◽  
Arid Regions ◽  
The West ◽  
West Nile ◽  
Valley Fever ◽  
Semi Arid

scholarly journals Experimental transmission of West Nile Virus and Rift Valley Fever Virus by Culex pipiens from Lebanon

2018 ◽  
Vol 12 (1) ◽  
pp. e0005983 ◽  
Author(s):  
Renée Zakhia ◽  
Laurence Mousson ◽  
Marie Vazeille ◽  
Nabil Haddad ◽  
Anna-Bella Failloux
Keyword(s):  
West Nile Virus ◽  
Rift Valley ◽  
Culex Pipiens ◽  
Rift Valley Fever ◽  
Rift Valley Fever Virus ◽  
Fever Virus ◽  
West Nile ◽  
Valley Fever ◽  
Experimental Transmission

scholarly journals Seroprevalence of Rift Valley Fever and West Nile Fever in Cattle in Gambella Region, South West Ethiopia

2020 ◽  
Vol Volume 11 ◽  
pp. 119-130
Author(s):  
Getahun Asebe ◽  
Gezahegne Mamo ◽  
Daniela Michlmayr ◽  
Woldaregay Erku Abegaz ◽  
Adugna Endale ◽  
...  
Keyword(s):  
Rift Valley ◽  
Rift Valley Fever ◽  
West Nile Fever ◽  
West Nile ◽  
Valley Fever ◽  
South West ◽  
South West Ethiopia

scholarly journals Detection of the Northeastern African Rift Valley Fever Virus Lineage During the 2015 Outbreak in Mauritania

2017 ◽  
Vol 4 (2) ◽  
Author(s):  
Ndeye Sakha Bob ◽  
Hampâté Bâ ◽  
Gamou Fall ◽  
Elkhalil Ishagh ◽  
Mamadou Y. Diallo ◽  
...  
Keyword(s):  
Rift Valley ◽  
Rift Valley Fever ◽  
Rift Valley Fever Virus ◽  
Hemorrhagic Fever ◽  
Enzyme Linked Immunosorbent Assay ◽  
Rt Pcr ◽  
West Nile ◽  
Valley Fever ◽  
Blood Samples ◽  
Crimean Congo Hemorrhagic Fever

Abstract Background Rift Valley fever (RVF) is an acute viral anthropozoonosis that causes epizootics and epidemics among livestock population and humans. Multiple emergences and reemergences of the virus have occurred in Mauritania over the last decade. This article describes the outbreak that occurred in 2015 in Mauritania and reports the results of serological and molecular investigations of blood samples collected from suspected RVF patients. Methods An RVF outbreak was reported from 14 September to 26 November 2015 in Mauritania. Overall, 184 suspected cases from different localities were identified by 26 health facilities. Blood samples were collected and tested by enzyme-linked immunosorbent assay (ELISA) and real-time reverse-transcription polymerase chain reaction (RT-PCR) at the Institut Pasteur de Dakar (IPD). Sequencing of partial genomes and phylogenetic analyses were performed on RT-PCR–positive samples. As part of routine surveillance at IPD, samples were also screened for dengue, yellow fever, West Nile, Crimean Congo hemorrhagic fever, Zika, and Chikungunya viruses by ELISA and RT-PCR. Results Of the 184 suspected cases, there were 57 confirmed cases and 12 deaths. Phylogenetic analysis of the sequences indicated an emergence of a virus that originated from Northeastern Africa. Our results show co-circulation of other arboviruses in Mauritania—dengue, Crimean Congo hemorrhagic fever, and West Nile viruses. Conclusion The Northeastern Africa lineage of RVF was responsible for the outbreak in Mauritania in 2015. Co-circulation of multiples arboviruses was detected. This calls for systematic differential diagnosis and highlights the need to strengthen arbovirus surveillance in Africa.

Isolation of West Nile and Sindbis Viruses from Mosquitoes Collected in the Nile Valley of Egypt During an Outbreak of Rift Valley Fever: Table 1

2002 ◽  
Vol 39 (1) ◽  
pp. 248-250 ◽  
Author(s):  
Michael J. Turell ◽  
John C. Morrill ◽  
Cynthia A. Rossi ◽  
Adel M. Gad ◽  
Stanton E. Cope ◽  
...  
Keyword(s):  
Rift Valley ◽  
Rift Valley Fever ◽  
Nile Valley ◽  
West Nile ◽  
Valley Fever
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