No abstract available.
Aedes/virology ; Animals ; Global Health ; Humans ; Travel ; Zika Virus/isolation & purification ; Zika Virus Infection/epidemiology/*pathology

Disease Outbreaks ; Humans ; Singapore ; epidemiology ; Zika Virus ; Zika Virus Infection ; epidemiology ; transmission ; virology

OBJECTIVETo clarify the possible association between the Zika virus (ZIKV) and microcephaly and understand where we are in terms of research and the debate on the causation between mild maternal clinical features and severe fetal microcephaly.

DATA SOURCESWe did a comprehensive literature review with the keywords "zika" and/or "microcephaly" from inception to May 27, 2016, with PubMed.

STUDY SELECTIONStudies were included and analyzed if they met all of the following criteria: "probable or confirmed infant microcephaly" and "probable or confirmed ZIKV infection among mothers or infants".

RESULTSWe emphasize the diagnosis of ZIKV infection, including maternal clinical manifestations, maternal and fetal laboratory confirmation, and possible autopsy if need. Other confounders that may lead to microcephaly should be excluded from the study. We presented the results from clinical manifestations of ZIKV infection, testing methods evolving but the mechanism of microcephaly uncertain, flexible definition challenging the diagnosis of microcephaly, and limited causal reference on pregnant women. We made analog comparison of severe acute respiratory syndrome and chikungunya virus in terms of DNA mutation and global movement to provide further research recommendation. The chance of catch-up growth may decrease the number of pervious "diagnosed" microcephaly.

CONCLUSIONSThere are some evidence available through mice models and direct isolation of ZIKV in affected pregnancies on kindly causal relationship but not convincible enough. We analyzed and presented the weakness or limitation of published reports with the desire to shed light to further study directions.

Animals ; Female ; Humans ; Microcephaly ; diagnosis ; etiology ; genetics ; Mutation ; Pregnancy ; Zika Virus ; pathogenicity ; Zika Virus Infection ; complications

Global Health ; Humans ; Singapore ; Social Medicine ; Zika Virus ; Zika Virus Infection

Flavivirus ; Humans ; Immunity ; Vaccines ; Zika Virus ; Zika Virus Infection/prevention & control*

Zika virus was first isolated in from nonhuman primate in 1947. It is in the genus Flavivirus, closely related to other flavivirus like Dengue, West Nile, Yellow fever and Japanese encephalitis virus. Since 2007 epidemic in Yap island, zika virus infections had spread to the countries in Micronesia and South Pacific. In 2015, Zika virus outbreak occurred in Brazil and now more than 40 countries in American continents reported autochthonous infection. The virus is transmitted mainly by Ae. aegypti mosquito with many other Aedes mosquito species known as vector. Recently, Zika virus infection is known to cause severe neurological complications and congenital malformation. In this paper, we will review current knowledge on Zika virus history, biology, clinical characteristics and preventive method.
Aedes ; Biology ; Brazil ; Culicidae ; Dengue ; Encephalitis Virus, Japanese ; Flavivirus ; Methods ; Microcephaly ; Micronesia ; Primates ; Yellow Fever ; Zika Virus Infection* ; Zika Virus*

The recent epidemic of Zika virus in South America caused people around the world to exhibit an increased interest in the impact of arboviral illnesses. In Korea, malaria and Japanese encephalitis are the most important mosquito-borne diseases that occur indigenously. However, with the continuously increasing number of international travelers, the incidence of imported arboviral illnesses is also increasing. Currently, dengue fever is the most common mosquito-borne disease among Korean international travelers. The number of patients with Japanese encephalitis, chikungunya fever, and Zika virus infection is also on the rise. Many countries that have disease-transmitting mosquitoes have already experienced autochthonous arboviral infections due to the introduction of viruses by travelers. Moreover, with global warming and urbanization of the areas in which mosquito-borne diseases occur, the environment is becoming more favorable for mosquito-borne diseases. This concise review describes the current status and outlook of mosquito-borne diseases in Korea.
Chikungunya Fever ; Culicidae ; Dengue ; Encephalitis, Japanese ; Global Warming ; Humans ; Incidence ; Korea* ; Malaria ; South America ; Urbanization ; Zika Virus ; Zika Virus Infection

Since Zika virus (ZIKV) has firstly been isolated in 1947, Uganda, outbreaks of Zika fever have been reported in many areas such as in Africa, Southeast Asia and America. Imported cases in China also have been reported. Zika virus belongs to the family Flaviviridae, genus Flavivirus, and include Africa subtype and Asia subtype. It is a mosquito-borne virus primarily transmitted by Aedes aegypti mosquitoes. Sexual transmission, Blood transmission and mother-to-fetus transmission were also reported. Zika virus can go though blood-brain barrier and infect central nervous system. Symptoms are generally mild and self-limited, but recent evidence suggests a possible association between maternal Zika virus infection and adverse fetal outcomes, such as congenital microcephaly, as well as a possible association with Guillain-Barré syndrome. Laboratorial Diagnosis includes nucleic acid detection, Serological test, and isolation of virus. Currently, no vaccine or medication exists to prevent or treat Zika virus infection. Preventive measures against Zika virus infection should be taken through prevention of mosquito bites and surveillance in epidemic area.
Aedes ; physiology ; virology ; Animals ; Humans ; Insect Vectors ; physiology ; virology ; Zika Virus ; genetics ; physiology ; Zika Virus Infection ; transmission ; virology

OBJECTIVES: Zika virus currently poses a global threat and is a major public health issue throughout Latin America and the Caribbean. However, Zika virus infections in humans have also been observed in other regions, including Southeast Asia, where arboviral diseases are very common. In this study, we summarize the current status of Zika virus in Southeast Asia. This review aims to provide an overview of the current situation and also to suggest ways of adequately managing the emergence of Zika virus in Southeast Asia. METHODS: The literature searching for the reports on Zika virus in Southeast Asia was done using standard database PubMed and the re-analysis and summarization on the reports was done. RESULTS: A limited number of reports have addressed Zika virus disease in Southeast Asia, but it is has been confirmed that a problem already exists. Individual case reports and outbreaks of Zika virus have been confirmed in Southeast Asia. Several reports have also described patients becoming infected after visiting Southeast Asia. In addition, the concurrent circulation of Zika virus with other arboviruses has been confirmed. CONCLUSIONS: As a tropical region with a high prevalence of arboviral diseases, the emergence of Zika virus in Southeast Asia is a major concern. It is essential for local medical personnel to recognize this disease. Given the status of Southeast Asia as a globally important tourist destination, continuous updates on the status of Zika virus in Southeast Asia are required and should be incorporated into global health advisories regarding travel.
Arboviruses ; Asia, Southeastern* ; Caribbean Region ; Disease Outbreaks ; Global Health ; Humans ; Latin America ; Prevalence ; Public Health ; Zika Virus Infection ; Zika Virus*

OBJECTIVE: To establish a non-coated enzyme-linked immunosorbent assay (ELISA) based on zika virus envelope (E) protein for detecting the expression of E protein in infected cells. METHODS: Adherent Vero-143 cells infected with zika virus in a 96-well plate were fixed, and the antibodies against zika virus E protein were added at an optimized concentration to establish the non-coated ELISA method for E protein. The antiviral activities of lignans compound C1 was evaluated using this method. The accuracy of this non-coated ELISA was verified by RT-PCR, and the cross reaction with dengue virus was assessed. RESULTS: After optimization, the background absorbance at 450 nm of uninfected cells was reduced to about 0.20. The antiviral activities of lignans compound C1 detected by this method were basically consistent with the results of RT-PCR. No cross reaction with dengue virus was found in this assay. CONCLUSIONS A non- coated ELISA method based on zika virus E protein was established, which can be used for screening antiviral agents against zika virus.
Antibodies, Viral ; Enzyme-Linked Immunosorbent Assay ; Humans ; Immunoglobulin G ; Immunoglobulin M ; Viral Envelope Proteins ; Zika Virus ; Zika Virus Infection