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Zika and pregnancy

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https://www.readbyqxmd.com/read/28207337/engaging-human-rights-in-the-response-to-the-evolving-zika-virus-epidemic
#1
Jennifer J K Rasanathan, Sarah MacCarthy, Debora Diniz, Els Torreele, Sofia Gruskin
In late 2015, an increase in the number of infants born with microcephaly in poor communities in northeast Brazil prompted investigation of antenatal Zika infection as the cause. Zika now circulates in 69 countries, and has affected pregnancies of women in 29 countries. Public health officials, policymakers, and international organizations are considering interventions to address health consequences of the Zika epidemic. To date, public health responses have focused on mosquito vector eradication, sexual and reproductive health services, knowledge and technology including diagnostic test and vaccine development, and health system preparedness...
February 16, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28199846/frequent-zika-virus-sexual-transmission-and-prolonged-viral-rna-shedding-in-an-immunodeficient-mouse-model
#2
Nisha K Duggal, Jana M Ritter, Samuel E Pestorius, Sherif R Zaki, Brent S Davis, Gwong-Jen J Chang, Richard A Bowen, Aaron C Brault
Circulation of Zika virus (ZIKV) was first identified in the Western hemisphere in late 2014. Primarily transmitted through mosquito bite, ZIKV can also be transmitted through sex and from mother to fetus, and maternal ZIKV infection has been associated with fetal malformations. We assessed immunodeficient AG129 mice for their capacity to shed ZIKV in semen and to infect female mice via sexual transmission. Infectious virus was detected in semen between 7 and 21 days post-inoculation, and ZIKV RNA was detected in semen through 58 days post-inoculation...
February 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/28193876/vulnerability-of-primitive-human-placental-trophoblast-to-zika-virus
#3
Megan A Sheridan, Dinar Yunusov, Velmurugan Balaraman, Andrei P Alexenko, Shinichiro Yabe, Sergio Verjovski-Almeida, Danny J Schust, Alexander W Franz, Yoel Sadovsky, Toshihiko Ezashi, R Michael Roberts
Infection of pregnant women by Asian lineage strains of Zika virus (ZIKV) has been linked to brain abnormalities in their infants, yet it is uncertain when during pregnancy the human conceptus is most vulnerable to the virus. We have examined two models to study susceptibility of human placental trophoblast to ZIKV: cytotrophoblast and syncytiotrophoblast derived from placental villi at term and colonies of trophoblast differentiated from embryonic stem cells (ESC). The latter appear to be analogous to the primitive placenta formed during implantation...
February 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28192072/persistence-of-zika-virus-in-breast-milk-after-infection-in-late-stage-of-pregnancy
#4
José R Sotelo, Andre B Sotelo, Fabio J B Sotelo, André M Doi, Joao R R Pinho, Rita de Cassia Oliveira, Alanna M P S Bezerra, Alice D Deutsch, Lucy S Villas-Boas, Alvina C Felix, Camila M Romano, Clarisse M Machado, Maria C J Mendes-Correa, Rubia A F Santana, Fernando G Menezes, Cristovao L P Mangueira
We detected Zika virus in breast milk of a woman in Brazil infected with the virus during the 36th week of pregnancy. Virus was detected 33 days after onset of signs and symptoms and 9 days after delivery. No abnormalities were found during fetal assessment or after birth of the infant.
May 15, 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28185815/novel-antiviral-activity-and-mechanism-of-bromocriptine-as-a-zika-virus-ns2b-ns3-protease-inhibitor
#5
Jasper Fuk-Woo Chan, Kenn Ka-Heng Chik, Shuofeng Yuan, Cyril Chik-Yan Yip, Zheng Zhu, Kah-Meng Tee, Jessica Oi-Ling Tsang, Chris Chung-Sing Chan, Vincent Kwok-Man Poon, Gang Lu, Anna Jinxia Zhang, Kin-Kui Lai, Kwok-Hung Chan, Richard Yi-Tsun Kao, Kwok-Yung Yuen
Zika virus (ZIKV) infection is associated with congenital malformations in infected fetuses and severe neurological and other systemic complications in adults. There are currently limited anti-ZIKV treatment options that are readily available and safe for use in pregnancy. In this drug repurposing study, bromocriptine was found to have inhibitory effects on ZIKV replication in cytopathic effect inhibition, virus yield reduction, and plaque reduction assays. Time-of-drug-addition assay showed that bromocriptine exerted anti-ZIKV activity between 0 and 12 h post-ZIKV inoculation, corroborating with post-entry events in the virus replication cycle prior to budding...
February 6, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28182608/prevalence-and-clinical-attributes-of-congenital-microcephaly-new-york-2013-2015
#6
Krishika A Graham, Deborah J Fox, Achala Talati, Cristian Pantea, Laura Brady, Sondra L Carter, Eric Friedenberg, Neil M Vora, Marilyn L Browne, Christopher T Lee
Congenital Zika virus infection can cause microcephaly and other severe fetal neurological anomalies (1). To inform microcephaly surveillance efforts and assess ascertainment sources, the New York State Department of Health and the New York City Department of Health and Mental Hygiene sought to determine the prevalence of microcephaly in New York during 2013-2015, before known importation of Zika virus infections. Suspected newborn microcephaly diagnoses were identified from 1) reports submitted by birth hospitals in response to a request and 2) queries of a hospital administrative discharge database for newborn microcephaly diagnoses...
February 10, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/28179396/the-antigenic-structure-of-zika-virus-and-its-relation-to-other-flaviviruses-implications-for-infection-and-immunoprophylaxis
#7
REVIEW
Franz X Heinz, Karin Stiasny
Zika virus was discovered ∼70 years ago in Uganda and maintained a low profile as a human disease agent in Africa and Asia. Only recently has it caused explosive outbreaks in previously unaffected regions, first in Oceania and then in the Americas since 2015. Of special concern is the newly identified link between congenital malformations (especially microcephaly) and Zika virus infections during pregnancy. At present, it is unclear whether Zika virus changed its pathogenicity or whether the huge number of infections allowed the recognition of a previously cryptic pathogenic property...
March 2017: Microbiology and Molecular Biology Reviews: MMBR
https://www.readbyqxmd.com/read/28177195/high-incidence-of-zika-virus-infection-detected-in-plasma-and-cervical-cytology-specimens-from-pregnant-women-in-guayaquil-ecuador
#8
Hector Zambrano, Jesse Waggoner, Karina León, Benjamin Pinsky, Ketty Vera, Marissa Schettino, Lisette Rivera, José Landivar, María Granda, Angela Lee, Gil Mor
Zika virus (ZIKV) infection during pregnancy has been linked to severe birth defects, and the epidemiologic situation of the ZIKV epidemic in Ecuador is poorly understood. Guayaquil, Ecuador, has a tropical climate and experiences frequent outbreaks of dengue and chikungunya virus, and in December 2015, ZIKV was identified. Given the well-documented effects of ZIKV in pregnancy, including microcephaly, we tested for the presence of ZIKV in both plasma and cervical cytology of pregnant women. We report the identification of a population of pregnant women with a high incidence of ZIKV infection detected in the plasma and lower reproductive tract...
February 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/28168206/passive-immunoprophylaxis-for-the-protection-of-the-mother-and-her-baby-insights-from-in-vivo-models-of-antibody-transport
#9
Yanqun Xu, Iftekhar Mahmood, Lilin Zhong, Pei Zhang, Evi B Struble
Pregnant women are at high risk for infection by pathogens. Vertical transmission of infectious agents, such as Zika, hepatitis B, and cytomegalovirus during pregnancy, remains a public health problem, associated with dire outcomes for the neonate. Thus, a safe prophylactic and therapeutic approach for protecting the mother and the neonate from infections remains a high priority. Our work is focused on better understanding the safety and efficacy determinants of IgG antibody preparations when used during pregnancy to benefit the mother and her baby...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28164300/risk-of-exposure-to-blood-products-during-pregnancy-guidance-for-zika-and-other-donor-deferral-policies
#10
Malia S Q Murphy, Nadine Shehata, Jo Ann Colas, Michaël Chassé, Dean A Fergusson, Sheila F O'Brien, Mindy Goldman, Alan Tinmouth, Alan J Forster, Kumanan Wilson
BACKGROUND: Exposure to blood products during pregnancy carries a potential risk of transfusion transmission of infectious agents. Blood agencies have historically sought optimal deferral and testing strategies to protect blood supplies in part to ensure the protection of pregnant women and their unborn infants. The Zika virus outbreak of 2016 has heightened attention to these concerns. In the current context of the recent Zika outbreak, and also more broadly, data are needed to shed light on the likelihood of exposure to blood products throughout pregnancy to inform policy...
February 5, 2017: Transfusion
https://www.readbyqxmd.com/read/28153665/infant-outcomes-among-women-with-zika-virus-infection%C3%A2-during-pregnancy-results-of-a-large-prenatal%C3%A2-zika%C3%A2-screening-program
#11
Emily H Adhikari, David B Nelson, Kathryn A Johnson, Sara Jacobs, Vanessa L Rogers, Scott Roberts, Taylor Sexton, Donald D McIntire, Brian Casey
BACKGROUND: Zika virus infection during pregnancy is a known cause of congenital microcephaly and other neurologic morbidities. OBJECTIVE: We present the results of a large-scale prenatal screening program in place at a single-center health care system since March 14, 2016. Our aims were to report the baseline prevalence of travel-associated Zika infection in our pregnant population, determine travel characteristics of women with evidence of Zika infection, and evaluate maternal and neonatal outcomes compared to women without evidence of Zika infection...
January 30, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28153056/study-protocol-on-establishment-of-sentinel-sites-network-for-contraceptive-and-abortion-trends-needs-and-utilization-of-services-in-zika-virus-affected-countries
#12
Moazzam Ali, Kelsey Miller, Rachel Folz, Brooke Ronald Johnson, James Kiarie
BACKGROUND: ZIKV(Zika Virus) during pregnancy can result in many adverse events such as fetal deaths or newborns with congenital abnormalities including microcephaly and other neural irregularities. Due to these harmful outcomes of pregnancy associated with the Zika virus, we can expect to see a change in the type and scale of demand for family planning and safe abortion services in areas affected by the Zika virus. The monitoring and reporting capacities of the local health clinics in these areas could benefit from the introduction of infrastructural improvements necessary to establish a sentinel site network...
February 2, 2017: Reproductive Health
https://www.readbyqxmd.com/read/28153043/a-study-protocol-for-facility-assessment-and-follow-up-evaluations-of-the-barriers-to-access-availability-utilization-and-readiness-of-contraception-abortion-and-postabortion-services-in-zika-affected-areas
#13
Moazzam Ali, Rachel Folz, Kelsey Miller, Brooke Ronald Johnson, James Kiarie
BACKGROUND: The Zika virus epidemic in Latin America has elicited official recommendations for women to delay or avoid pregnancy in affected countries, which has increased demand for family planning services. It is likely, however, that health facilities in areas where the population is most vulnerable to the disease lack the capacity to respond to the increased demand for family planning services. Our objectives are to perform facilities assessment and understand client perceptions in areas affected by Zika virus, and to track changes in these parameters over time...
February 2, 2017: Reproductive Health
https://www.readbyqxmd.com/read/28148798/animal-models-of-zika-virus-infection-pathogenesis-and-immunity
#14
Thomas E Morrison, Michael S Diamond
Zika virus (ZIKV) is an emerging mosquito-transmitted flavivirus that now causes epidemics affecting millions of people on multiple continents. The virus has reached global attention because of some of its unusual epidemiological and clinical features including persistent infection in the male reproductive tract and sexual transmission, an ability to cross the placenta during pregnancy and infect the developing fetus to cause congenital malformations, and its association with Guillain-Barré syndrome in adults...
February 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28146192/-zika-virus-infection-in-pregnancy-fetal-and-neonatal-impact
#15
Wilfrido Coronell-Rodríguez, Cindy Arteta-Acosta, M Alejandra Suárez-Fuentes, M Cecilia Burgos-Rolon, M Teresa Rubio-Sotomayor, Michelle Sarmiento-Gutiérrez, Carlos Corzo-Díaz
Zika virus (ZV) is an arbovirus transmitted by Aedes aegypti and A. albopictus. The neurotropic profile of this virus is known since 1952. The main finding related to ZV in America is microcephaly. Two hypotheses are tested on its involvement in the central nervous system: its neurotropic feature and the direct effect of ZV on the placenta. Malformations and clinical findings on fetal development comprise congenital Zika syndrome. RT-PCR and serology (IgM) are useful for definitive diagnosis. However, we should keep in mind first that the viremia in pregnant women can stay for a longer period of time, and second, a positive IgM for Zika should be properly interpreted in an endemic area to other flavivirus...
December 2016: Revista Chilena de Infectología: órgano Oficial de la Sociedad Chilena de Infectología
https://www.readbyqxmd.com/read/28126366/testing-for-zika-virus-infection-in-pregnancy-key-concepts-to-deal-with-an-emerging-epidemic
#16
REVIEW
Catherine Eppes, Martha Rac, James Dunn, James Versalovic, Kristy O Murray, Melissa A Suter, Magda Sanz Cortes, Jimmy Espinoza, Maxim D Seferovic, Wesley Lee, Peter Hotez, Joan Mastrobattista, Steven L Clark, Michael A Belfort, Kjersti M Aagaard
Zika virus is an emerging mosquito-borne (Aedes genus) arbovirus of the Flaviviridae family. Following epidemics in Micronesia and French Polynesia during the past decade, more recent Zika virus infection outbreaks were first reported in South America as early as May 2013 and spread to now 50 countries throughout the Americas. Although no other flavivirus has previously been known to cause major fetal malformations following perinatal infection, reports of a causal link between Zika virus and microcephaly, brain and ocular malformations, and fetal loss emerged from hard-hit regions of Brazil by October 2015...
January 23, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28120653/more-than-half-of-women-in-brazil-avoiding-pregnancy-due-to-zika-virus
#17
(no author information available yet)
Experts have called for a review of the criminalisation of abortion and better access to contraception for women in Brazil after research revealed more than 50% are avoiding getting pregnant because of the Zika virus.
January 25, 2017: Nursing Standard
https://www.readbyqxmd.com/read/28104381/five-cases-of-acute-zika-virus-infection-in-french-women-of-reproductive-age-returning-from-central-and-south-america
#18
P Penot, S Balavoine, A Leplatois, S Brichler, I Leparc-Goffart, A-C Alloui, O Flusin, J Guilleminot, M Amellou, J-M Molina
INTRODUCTION: The favorable season for Aedes albopictus circulation has started in Europe and may lead to autochthonous transmission of Zika virus. Health care providers should be familiar with evocative clinical presentations and able to give updated information to women of reproductive age infected by Zika virus. OBSERVATIONS: We report five laboratory-confirmed Zika virus infections imported to metropolitan France from Central and South America between January and April, 2016...
January 16, 2017: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/28102503/reducing-unintended-pregnancies-as-a-strategy-to-avert-zika-related-microcephaly-births-in-the-united-states-a-simulation-study
#19
Katherine A Ahrens, Jennifer A Hutcheon, Loretta Gavin, Susan Moskosky
Introduction There is increasing evidence that infection with the Zika virus (ZIKV) during pregnancy can lead to severe brain abnormalities in infants exposed in utero. The objective of our analysis was to estimate the contribution of enhanced contraception access to averting ZIKV-related microcephaly births in the United States, alone and in combination with another possible strategy, anti-ZIKV vaccination. Methods We used Monte Carlo sampling techniques (n = 100,000 simulations) to estimate the number of microcephaly births expected under strategies of enhanced contraception only, vaccination only, both enhanced contraception and vaccination, and status quo (no intervention)...
January 19, 2017: Maternal and Child Health Journal
https://www.readbyqxmd.com/read/28081529/zika-virus-induced-microcephaly-and-its-possible-molecular-mechanism
#20
Md Imam Faizan, Mohd Abdullah, Sher Ali, Irshad H Naqvi, Anwar Ahmed, Shama Parveen
Zika virus is an arthropod-borne re-emerging pathogen associated with the global pandemic of 2015-2016. The devastating effect of Zika viral infection is reflected by its neurological manifestations such as microcephaly in newborns. This scenario evoked our interest to uncover the neurotropic localization, multiplication of the virus, and the mechanism of microcephaly. The present report provides an overview of a possible molecular mechanism of Zika virus-induced microcephaly based on recent publications. Transplacental transmission of Zika viral infection from mother to foetus during the first trimester of pregnancy results in propagation of the virus in human neural progenitor cells (hNPCs), where entry is facilitated by the receptor (AXL protein) leading to the alteration of signalling and immune pathways in host cells...
2016: Intervirology
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