scholarly journals Zika Virus Transmission from French Polynesia to Brazil

2015 ◽  
Vol 21 (10) ◽  
pp. 1887-1887 ◽  
Author(s):  
Didier Musso
Keyword(s):  
Zika Virus ◽  
Virus Transmission ◽  
French Polynesia

scholarly journals Potential for Zika virus transmission through blood transfusion demonstrated during an outbreak in French Polynesia, November 2013 to February 2014

2014 ◽  
Vol 19 (14) ◽  
Author(s):  
D Musso ◽  
T Nhan ◽  
E Robin ◽  
C Roche ◽  
D Bierlaire ◽  
...  
Keyword(s):  
Nucleic Acid ◽  
Blood Transfusion ◽  
Zika Virus ◽  
Blood Donors ◽  
Blood Donation ◽  
Virus Transmission ◽  
French Polynesia ◽  
Nucleic Acid Testing ◽  
Blood Safety ◽  
Zika Fever

Since October 2013, French Polynesia has experienced the largest documented outbreak of Zika virus (ZIKAV) infection. To prevent transmission of ZIKAV by blood transfusion, specific nucleic acid testing of blood donors was implemented. From November 2013 to February 2014: 42 (3%) of 1,505 blood donors, although asymptomatic at the time of blood donation, were found positive for ZIKAV by PCR. Our results serve to alert blood safety authorities about the risk of post-transfusion Zika fever.

Increase in Reported Prevalence of Microcephaly in Infants Born to Women Living in Areas with Confirmed Zika Virus Transmission During the First Trimester of Pregnancy — Brazil, 2015

2016 ◽  
Vol 65 (9) ◽  
Author(s):  
Wanderson Kleber de Oliveira ◽  
Juan Cortez-Escalante ◽  
Wanessa Tenório Gonçalves Holanda De Oliveira ◽  
Greice Madeleine Ikeda do Carmo ◽  
Cláudio Maierovitch Pessanha Henriques ◽  
...  
Keyword(s):  
Zika Virus ◽  
Virus Transmission ◽  
First Trimester ◽  
First Trimester Of Pregnancy

Increase in Reported Prevalence of Microcephaly in Infants Born to Women Living in Areas with Confirmed Zika Virus Transmission During the First Trimester of Pregnancy — Brazil, 2015

2016 ◽  
Vol 65 (9) ◽  
pp. 242-247 ◽  
Author(s):  
Wanderson Kleber de Oliveira ◽  
Juan Cortez-Escalante ◽  
Wanessa Tenório Gonçalves Holanda De Oliveira ◽  
Greice Madeleine Ikeda do Carmo ◽  
Cláudio Maierovitch Pessanha Henriques ◽  
...  
Keyword(s):  
Zika Virus ◽  
Virus Transmission ◽  
First Trimester ◽  
First Trimester Of Pregnancy

scholarly journals Zika Virus Transmission-Region of the Americas, May 15, 2015-December 15, 2016

2017 ◽  
Vol 17 (6) ◽  
pp. 1681-1686 ◽  
Author(s):  
J. Ikejezie ◽  
C. N. Shapiro ◽  
J. Kim ◽  
M. Chiu ◽  
M. Almiron ◽  
...  
Keyword(s):  
Zika Virus ◽  
Virus Transmission ◽  
Transmission Region

scholarly journals Sequential Infection of Aedes aegypti Mosquitoes with Chikungunya Virus and Zika Virus Enhances Early Zika Virus Transmission

Insects ◽  
2018 ◽  
Vol 9 (4) ◽  
pp. 177 ◽  
Author(s):  
Tereza Magalhaes ◽  
Alexis Robison ◽  
Michael Young ◽  
William Black ◽  
Brian Foy ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Blood Meal ◽  
Zika Virus ◽  
Chikungunya Virus ◽  
Vector Competence ◽  
Virus Transmission ◽  
Mosquito Vector ◽  
Molecular Aspects ◽  
Virus Interactions ◽  
Sequential Infection

In urban settings, chikungunya, Zika, and dengue viruses are transmitted by Aedes aegypti mosquitoes. Since these viruses co-circulate in several regions, coinfection in humans and vectors may occur, and human coinfections have been frequently reported. Yet, little is known about the molecular aspects of virus interactions within hosts and how they contribute to arbovirus transmission dynamics. We have previously shown that Aedes aegypti exposed to chikungunya and Zika viruses in the same blood meal can become coinfected and transmit both viruses simultaneously. However, mosquitoes may also become coinfected by multiple, sequential feeds on single infected hosts. Therefore, we tested whether sequential infection with chikungunya and Zika viruses impacts mosquito vector competence. We exposed Ae. aegypti mosquitoes first to one virus and 7 days later to the other virus and compared infection, dissemination, and transmission rates between sequentially and single infected groups. We found that coinfection rates were high after sequential exposure and that mosquitoes were able to co-transmit both viruses. Surprisingly, chikungunya virus coinfection enhanced Zika virus transmission 7 days after the second blood meal. Our data demonstrate heterologous arbovirus synergism within mosquitoes, by unknown mechanisms, leading to enhancement of transmission under certain conditions.

scholarly journals Author response: Epidemiological and ecological determinants of Zika virus transmission in an urban setting

2017 ◽  
Author(s):  
José Lourenço ◽  
Maricelia Maia de Lima ◽  
Nuno Rodrigues Faria ◽  
Andrew Walker ◽  
Moritz UG Kraemer ◽  
...  
Keyword(s):  
Zika Virus ◽  
Virus Transmission ◽  
Urban Setting ◽  
Author Response

scholarly journals Transmission dynamics of Zika virus in island populations: a modelling analysis of the 2013-14 French Polynesia outbreak

2016 ◽  
Author(s):  
Adam J. Kucharski ◽  
Sebastian Funk ◽  
Rosalind M. Eggo ◽  
Henri-Pierre Mallet ◽  
W. John Edmunds ◽  
...  
Keyword(s):  
South America ◽  
Dengue Virus ◽  
Zika Virus ◽  
French Polynesia ◽  
Neurological Complications ◽  
Transmission Dynamics ◽  
Guillain Barre Syndrome ◽  
Island Populations ◽  
The Pacific ◽  
Guillain Barré

AbstractBetween October 2013 and April 2014, more than 30,000 cases of Zika virus (ZIKV) disease were estimated to have attended healthcare facilities in French Polynesia. ZIKV has also been reported in Africa and Asia, and in 2015 the virus spread to South America and the Caribbean. Infection with ZIKV has been associated with neurological complications including Guillain-Barré Syndrome (GBS) and microcephaly, which led the World Health Organization to declare a Public Health Emergency of International Concern in February 2015. To better understand the transmission dynamics of ZIKV, we used a mathematical model to examine the 2013–14 outbreak on the six major archipelagos of French Polynesia. Our median estimates for the basic reproduction number ranged from 2.6–4.8, with an estimated 11.5% (95% CI: 7.32–17.9%) of total infections reported. As a result, we estimated that 94% (95% CI: 91–97%) of the total population of the six archipelagos were infected during the outbreak. Based on the demography of French Polynesia, our results imply that if ZIKV infection provides complete protection against future infection, it would take 12–20 years before there are a sufficient number of susceptible individuals for ZIKV to reemerge, which is on the same timescale as the circulation of dengue virus serotypes in the region. Our analysis suggests that ZIKV may exhibit similar dynamics to dengue virus in island populations, with transmission characterized by large, sporadic outbreaks with a high proportion of asymptomatic or unreported cases.Author SummarySince the first reported major outbreak of Zika virus disease in Micronesia in 2007, the virus has caused outbreaks throughout the Pacific and South America. Transmitted by the Aedes species of mosquitoes, the virus has been linked to possible neurological complications including Guillain-Barre Syndrome and microcephaly. To improve our understanding of the transmission dynamics of Zika virus in island populations, we analysed the 2013–14 outbreak on the six major archipelagos of French Polynesia. We found evidence that Zika virus infected the majority of population, but only around 12% of total infections on the archipelagos were reported as cases. If infection with Zika virus generates lifelong immunity, we estimate that it would take at least 15–20 years before there are enough susceptible people for the virus to reemerge. Our results suggest that Zika virus could exhibit similar dynamics to dengue virus in the Pacific, producing large but sporadic outbreaks in small island populations.

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