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    Coronaviruses in pregnant women in Saudi Arabia: A systematic comparative review of MERS-CoV and SARS-CoV-2

    2021-06-05 02:03:00MazinBarryMagdoleenBarry
    Asian Pacific Journal of Reproduction 2021年3期

    Mazin Barry, Magdoleen A. Barry

    1Division of Infectious Diseases, Department of Medicine, College of Medicine, King Saud University, Riyadh, Saudi Arabia

    2Department of Obstetrics and Gynecology, King Salman Hospital, Ministry of Health, Riyadh, Saudi Arabia

    ABSTRACT

    KEYWORDS: MERS-CoV; SARS-CoV-2; COVID-19; Pregnant women

    1. Introduction

    On December 31, 2019, a cluster of pneumonia cases were reported in relation to a new coronavirus named severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), the causative agent of coronavirus disease 2019 (COVID-19)[1-3]. The World Health Organization (WHO) declared a pandemic on March 11,2020[4].

    As of November 29, 2020, COVID-19 had been reported globally in 191 countries, with 62 311 483 laboratory-confirmed cases causing 1 453 467 deaths[5]. Efforts to eliminate SARS-CoV-2 are unlikely to succeed in the long term, as they are constantly challenged by the births of new susceptible hosts and by the waning of immunity in previously infected individuals. The durability of immunity to SARS-CoV-2 is not yet fully established[6], but new births will promote virus survival. Thus, like other infectious pathogens, SARS-CoV-2 is likely to circulate in humans for many years to come[7].

    The Kingdom of Saudi Arabia (KSA) is one of the top 30 countries in terms of total reported COVID-19 cases, with 356 911 laboratory-confirmed cases and 5 870 deaths[5] as of November 29, 2020. It is also the only country in the world in which a second coronavirus[8], Middle East respiratory syndrome coronavirus(MERS-CoV), has continued to cause seasonal epidemics since it was first discovered in 2012[9]. As of June 1, 2020, a total of 2 167 laboratory-confirmed cases of MERS-CoV had been reported in KSA with 842 deaths[10,11].

    Pregnant women are more prone to such infections and thus are at increased risk of maternal and fetal complications[12]. Moreover,during epidemics and pandemics, medical resources may be shifted away from reproductive health to more urgent medical needs. This can create obstacles for pregnant women to access health care, which, in turn, can lead to obstetrical complications,including stillbirths, preterm deliveries, maternal mortality, and fetal respiratory complications. To identify how these challenges might be addressed, we reviewed all published studies on pregnant women infected with these virus in KSA.

    2. Materials and methods

    2.1. Study design

    A review was conducted for all literatures on pregnant women with MERS-CoV and/or SARS-CoV-2 infections in Saudi Arabia published between September 1, 2012 and November 29, 2020.

    2.2. Search strategies

    The search strategy was based on the following key terms:“pregnant women” AND “MERS CoV” or “Middle East respiratory syndrome coronavirus” or “coronavirus disease 2019” or “COVID-19” or “SARS-CoV-2” or “severe adult respiratory syndrome coronovirus-2” AND “Saudi Arabia” or “ Kingdom of Saudi Arabia.” All search terms were in the English language. The search was conducted on the Science Direct, PubMed, Web of Science, and Google Scholar databases. The search was completed independently by each of the authors, and a total of 26 articles were found.

    2.3. Eligibility criteria

    Articles on pregnant women with MERS-CoV or COVID-19 infections published between September 1, 2012 and November 29,2020 were included. Studies of the disease dynamics of pregnant women without MERS-CoV or SARS-CoV-2 infection were excluded. Articles written in languages other than English were also excluded. We first examined titles and abstracts. Articles for which abstracts were not available were not included. We screened the articles by checking the abstracts and removed any duplicate articles.After screening, 13 papers were excluded for the following reasons:no abstract available (n=2), articles on disease dynamic without MERS or COVID (n=10), and non english language (n=1).Seven articles remained. We performed a full-text analysis of these remaining articles and removed two that did not meet the inclusion criteria. Lastly, 5 papers were included in analysis.

    The inclusion and exclusion processes were summarized using a PRISMA flowchart (Figure 1). We collected data on pregnant women with SARS-CoV-2, vertical transmission, MERS-CoV, or COVID-19 and on the impact of these infections on newborns.

    Figure 1. Flowchart of the process of identifying papers for review.

    2.4. Assessment of study quality

    The quality of the selected papers was evaluated by the authors.Due to the low number of studies, a meta-analysis was not performed.

    3. Results

    Eleven cases of MERS-CoV in pregnant women in KSA were reported in the literature. The mean age of the pregnant women was 33 years, and the mean gestational age was 28 weeks. Seven of these pregnant women (64%) were admitted to an intensive care unit(ICU), and 40% required a cesarean section. The rate of maternal fatality directly attributed to MERS-COV was 35%[13], and all deaths occurred within 2-3 weeks post-delivery. The overall fetal death rate was 30%[14]. There was one intrauterine death, one still birth, and one preterm delivery at 25 weeks with a 4-hour post-birth neonatal death. No vertical transmission was confirmed in any case[13,15-17].Only four pregnant women with COVID-19 in KSA were reported in the literature, three of whom were asymptomatic and were detected by routine testing as part of routine obstetric care. Two women delivered vaginally, and the other two underwent cesarean sections. All the women survived, and all four babies were healthy and tested negative for COVID-19[18] (Table 1).

    Table 1. Summary of reported studies of pregnant women with either MERS-CoV or COVID-19 in Saudi Arabia, including outcomes.

    4. Discussion

    A wide spectrum of symptomatic cases of pregnant women infected with MERS-CoV has been reported, while no asymptomatic cases have been identified[19]. Regarding transmission and preventive measures, it is important that pregnant women have knowledge of the preventive measures recommended by the WHO to prevent infection of both themselves and their infants. These measures include frequent hand washing; maintaining at least 1 m distance from others; avoiding touching one’s eyes, nose, and mouth with one’s hands; covering one’s mouth and nose when coughing or sneezing; wearing a face mask in public; and staying at home[20]. In a cross-sectional survey of 284 pregnant women, 61% had adequate knowledge of measures to prevent the spread of COVID-19, but only 30% practiced these measures[21]. No studies on pregnant women’s knowledge of how to prevent MERS-CoV infection were identified.Thus far, no evidence of vertical transmission of SARS-CoV-2 has been observed in pregnant women[22]. Preterm deliveries have occurred among women infected with COVID-19 during the pandemic, but it is unclear whether they were due to COVID-19 infection itself or other complications. Cases of preterm labor have been reported to have increased during the pandemic, but this finding is not directly attributed to COVID-19[23]. No preterm labor has been reported in KSA yet. The potential risk of vertical transmission has been considered in several studies[22,24,25]. A study by Chen et al[26] on vertical transmission of COVID-19 infection from pregnant women to neonates indicated that pregnant women with COVID-19 did not show any different symptoms or worse disease compared to non-pregnant women with COVID-19 infection. No vertical transmission has been reported in KSA. Most studies included in a narrative review of the emerging literature on the challenges faced by pregnant women during the pandemic found no vertical transmission. However, the authors of the review suggested that special care be taken in treating pregnant women with COVID-19[27].In their systematic review of all available studies of pregnant women with MERS-CoV, including women in KSA, Diriba et al[28] reported no vertical transmission. Regarding the overall clinical effects of MERS-CoV and SARS-CoV-2, a systematic review of all infected pregnant women with MERS-CoV[28] reported a 33% prevalence of preterm birth at <34 weeks of gestation, while 80% of pregnant women studied gave birth at >37 weeks gestation. Preeclampsia was reported in 6% of pregnant women infected with MERS-CoV.The rate of pregnant women with MERS-CoV admitted to ICU was 33%, while the maternal death rate from the disease was reported to be as high as 40%, which is similar to that reported in the general population[29]. The prevalence of pregnant women with MERS-CoV who gave birth by cesarean section was 66.7%, while only 17%underwent normal delivery. Perinatal death was reported in 33.3% of newborns.

    In a systematic review of all infected pregnant women with SARSCoV-2[28], the prevalence of preterm birth at 34 to 37 weeks of gestation was 14%, while 46% of pregnant women gave birth at >37 weeks of gestation. Preeclampsia was reported in 5% of cases. Premature rupture of membranes was reported in 9% of the women studied, and the rate of fetal growth restriction was 1%. Miscarriage was reported in 2.4% of cases. Of all infected pregnant women, 28.5% were admitted to the ICU, while the rate of maternal death was 1.5%. The prevalence of cesarean section was 57%. Fetal distress was reported in 25% of cases. The rate of neonatal asphyxia was 1.6%, and the rate of perinatal death was 2.9%. Regarding recommendations for obstetrical care issued by Saudi Medical Societies early in the COVID-19 pandemic, the Saudi Anesthesia Society published several recommendations on obstetrical considerations to be addressed[30]. These included surge planning through the formation of an institutional multidisciplinary obstetric COVID-19 committee to set out clinical pathways and procedures; collaboration between hospitals that offer obstetric care to form a network for channeling scheduled cesarean deliveries to centers not in a moderate-to-crisis level surge; advice to health care workers who are pregnant beyond 28 weeks of gestation to avoid contact with suspected or confirmed COVID-19 patients and to take nonclinical assignments if necessary; early recruitment of volunteers to address possible manpower shortages; modifications to increase isolation capacity and provide high-efficiency particulate air filters to prevent airborne infection in areas such as isolation rooms; stringent visitation policies; preadmission screening for elective admissions;and contact tracing of exposed personnel. The Saudi Society of Maternal-Fetal Medicine published guidance on pregnancy and COVID-19, which included pregnancy management, medication concerns, labor considerations, and postpartum and neonatal care[31].Neither society has published any similar recommendations for MERS-CoV.

    The positive effects of adhering to these COVID-19 recommendations have not yet been published and should be assessed in further studies.

    5. Conclusion

    Published data on pregnant women in KSA infected with MERSCoV and SARS-CoV-2 coronaviruses is limited, despite the fact that they are at increased risk of adverse obstetrical outcomes. Maternal and neonatal morbidity and mortality is much higher for MERSCoV than for SARS-CoV-2. However, data on more cases is needed to truly grasp the extent of these infections in pregnant women.Additionally, gaps in obstetrics and neonatal care for those infected with these coronaviruses must be identified and further by the relevant societies.

    Conflict of interest statement

    The authors declare that there is no conflict of interest.

    Authors’ contributions

    Mazin Barry and Magdoleen A. Barry conrtibuted to the conceptualization, methodology, manuscript writing and editing equally.

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