Zika virus infection in Vietnam: current epidemic, strain origin, spreading risk, and perspective

Chu, Dinh‐Toi; Ngọc, Võ Trương Như; Tao, Yang

doi:10.1007/s10096-017-3030-8

Cited by 27 publications

(22 citation statements)

References 5 publications

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“…Acute Zika virus cases have been reported in Indonesia ( 8 ), Singapore ( 9 ), Malaysia ( 10 ), Vietnam ( 11 ), and Thailand ( 12 ). However, little is known about Zika virus prevalence in the region.…”

mentioning

confidence: 99%

Zika Virus Seropositivity in 1–4-Year-Old Children, Indonesia, 2014

Sasmono¹,

Dhenni²,

Yohan³

et al. 2018

Emerg. Infect. Dis.

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confidence: 99%

Zika Virus Seropositivity in 1–4-Year-Old Children, Indonesia, 2014

Sasmono¹,

Dhenni²,

Yohan³

et al. 2018

Emerg. Infect. Dis.

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“…Whereas, the Philippines seems to have had a single strain of ZIKV circulating for several years, Thailand and Vietnam appear to have experienced multiple introductions and “waves” of ZIKV that have swept across these countries (Suppl. fig S1 and S5 ) followed by re-occurring outbreaks 29 , 41 . Consequently, following the isolated Micronesian epidemic in 2007, ZIKV continued to circulate and evolve in the SEA–Indian-region 32 , 42 before causing a large-scale epidemic in FP in 2013/2014.…”

Section: Discussionmentioning

confidence: 96%

Re-visiting the evolution, dispersal and epidemiology of Zika virus in Asia

Pettersson

Bohlin

Dupont‐Rouzeyrol

et al. 2018

Emerging Microbes & Infections

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Based on serological evidence and viral isolation, Zika virus (ZIKV) has circulated for many years relatively benignly in a sylvatic cycle in Africa and an urban cycle in South East Asia (SEA). With the recent availability of limited but novel Indian ZIKV sequences to add to the plethora of SEA sequences, we traced the phylogenetic history and spatio-temporal dispersal pattern of ZIKV in Asia prior to its explosive emergence in the Pacific region and the Americas. These analyses demonstrated that the introduction and dispersal of ZIKV on the Pacific islands were preceded by an extended period of relatively silent transmission in SEA, enabling the virus to expand geographically and evolve adaptively before its unanticipated introduction to immunologically naive populations on the Pacific islands and in the Americas. Our findings reveal new features of the evolution and dispersal of this intriguing virus and may benefit future disease control strategies.

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“…Among Israeli travelers to Asia, where steady-state transmission exists rather than outbreak conditions, the incidence of ZIKV ranged from 17.9 to 26.8 cases/ 100,000 travel-years for Thailand, to 160.7-214.2/100,000 travel-years for the Philippines. To date, non-traveler data on autochthonous ZIKV in Southeast Asia are limited (as is the case for Thailand and Vietnam 15,16 ) or completely unavailable (Philippines). It is likely that the true burden of ZIKV infection in these countries is underestimated: our data suggest that the burden of ZIKV in Southeast Asia is probably far greater than is currently recognized locally.…”

Section: Discussionmentioning

confidence: 99%

Zika Virus in Israeli Travelers: Emergence of Asia as a Major Source of Infection

Meltzer

Lustig

Schwartz

2019

The American Journal of Tropical Medicine and Hygiene

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Zika virus (ZIKV) had emerged as a global arboviral concern since late 2015. In this study, we describe the results of ZIKV testing in returning Israeli travelers from Zika-endemic countries. We conducted a nationwide prospective observational study, including all ZIKV tests during January 2016-June 2017. Zika virus infection was defined as confirmed, if diagnosed by polymerase chain reaction (PCR) or serology confirmed by neutralization, and as possible if diagnosed by serology alone. During the study period, 1,188 travelers were tested: 66.7%, 30.5%, 1.6%, and 1.2% had returned from the Americas, Asia, Africa, and Oceania, respectively. Thirty persons were diagnosed with ZIKV. Most travelers tested were women of reproductive age; the gender ratio among infected travelers however was 1.0. During 2016, 19/20 (95%) ZIKV cases were acquired in the Americas; in 2017, however, 6/10 (60%) cases were acquired in Asia. Of 248 symptomatic travelers, 28 (11.3%) were diagnosed with ZIKV infection, whereas only 2/940 (0.2%) of asymptomatic travelers were diagnosed with ZIKV infection Odds ratio = 59.7 (95% confidence interval: 14.1-252.5, P < 0.0001). Our findings suggest that although women are more likely to be referred for ZIKV testing, gender does not affect the likelihood of ZIKV infection and that asymptomatic ZIKV infection appears to be rare in travelers. Furthermore, it appears that in 2017, Southeast Asia emerges as the leading source of travel-related ZIKV infection.

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Zika virus infection in Vietnam: current epidemic, strain origin, spreading risk, and perspective

Cited by 27 publications

References 5 publications

Zika Virus Seropositivity in 1–4-Year-Old Children, Indonesia, 2014

Zika Virus Seropositivity in 1–4-Year-Old Children, Indonesia, 2014

Re-visiting the evolution, dispersal and epidemiology of Zika virus in Asia

Zika Virus in Israeli Travelers: Emergence of Asia as a Major Source of Infection

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