Bat species assemblage predicts coronavirus prevalence.

Anthropogenic disturbances and the subsequent loss of biodiversity are altering species abundances and communities. Since species vary in their pathogen competence, spatio-temporal changes in host assemblages may lead to changes in disease dynamics. We explore how longitudinal changes in bat species assemblages affect the disease dynamics of coronaviruses (CoVs) in more than 2300 cave-dwelling bats captured over two years from five caves in Ghana. This reveals uneven CoV infection patterns between closely related species, with the alpha-CoV 229E-like and SARS-related beta-CoV 2b emerging as multi-host pathogens. Prevalence and infection likelihood for both phylogenetically distinct CoVs is influenced by the abundance of competent species and naïve subadults. Broadly, bat species vary in CoV competence, and highly competent species are more common in less diverse communities, leading to increased CoV prevalence in less diverse bat assemblages. In line with the One Health framework, our work supports the notion that biodiversity conservation may be the most proactive measure to prevent the spread of pathogens with zoonotic potential.

Facilitators and barriers to home blood pressure monitoring among pregnant women in Ghana: a mixed-methods analysis of patient perspectives.

BACKGROUND: The benefit of home blood pressure monitoring during pregnancy and in low-resource settings is incompletely understood. The objective of this study was to explore the experiences, barriers, and facilitators of home blood pressure monitoring among pregnant women in Ghana. METHODS: This concurrent triangulation mixed-methods study was conducted at an urban tertiary hospital in Ghana. Participants were recruited from adult pregnant women presenting for routine antenatal care. Upon enrollment, participants' demographics and history were collected. At the next study visit, participants received audiovisual and hands-on training on using an automatic blood pressure monitor; they then monitored and logged their blood pressure daily at home for 2-4 weeks. At the final study visit, verbally administered surveys and semi-structured interviews assessed participant's experiences. Quantitative data were analyzed using R version 4.2.2, and frequencies and descriptive statistics were calculated. Qualitative data were imported into DeDoose 9.0.78 for thematic analysis. RESULTS: Of 235 enrolled participants, 194 completed surveys; of those, 33 completed in-depth interviews. Participants' mean age was 31.6 (SD 5.3) years, 32.1% had not previously given birth, and 31.1% had less than a senior high school education. On a 4-point Likert scale, the majority reported they "definitely" were able to remember (n = 134, 69.1%), could find the time (n = 124, 63.9%), had the energy (n = 157, 80.9%), could use the blood pressure monitor without problems (n = 155, 79.9%), and had family approval (n = 182, 96.3%) while engaging in home blood pressure monitoring. 95.88% (n = 186) believed that pregnant women in Ghana should monitor their blood pressure at home. Qualitative thematic analysis demonstrated that most participants liked home blood pressure monitoring because of increased knowledge of their health during pregnancy. While most participants found measuring their blood pressure at home doable, many faced challenges. Participants' experiences with five key factors influenced how easy or difficult their experience was: 1) Time, stress, and daily responsibilities; 2) Perceived importance of BP in pregnancy; 3) Role of family; 4) Capability of performing monitoring; 5) Convenience of monitoring. CONCLUSIONS: Among pregnant women in urban Ghana, home blood pressure monitoring was perceived as positive, important, and doable; however, challenges must be addressed.

A retrospective analysis of malaria deaths in the pre- and intra- COVID 19 pandemic era, Ghana, 2016-2021.

BACKGROUND: Global efforts over the years have resulted in a 27% reduction in malaria incidence and an estimated 51% reduction in malaria mortality since 2000. Meanwhile, COVID-19 pandemic disrupted provision and utilization of malaria services, leading to a surge in malaria incidence and mortality. Globally, 627000 malaria deaths were recorded in 2020, representing about 69000 more deaths compared to 2019. Also, 14 million more cases of malaria were recorded in 2020 compared to 2019. This study sought to determine whether excess malaria deaths were recorded in Ghana during the COVID-19 pandemic era. METHODS: This was a descriptive study on routine malaria mortality data in Ghana for the period 2016 to 2021. Data was retrieved from the District Health Information Management System using a data extraction guide. Excess mortality was defined as occurrence of malaria deaths more than expected value for the period 2020 and 2021. The expected number of mortalities for 2020 and 2021 were determined using 2016 to 2019 average. Excess mortality (P-score) was estimated using the formula: [(reported mortalities-expected mortalities)/expected mortalities X 100%]. Data were summarized and processed in Microsoft excel version 16.0. Malaria mortality in Ghana and its regions was described using tables and line graphs. RESULTS: An average of 535 malaria deaths per year were recorded nationwide from 2016 to 2020. About 50% (1603/3207) of deaths occurred in children aged less than five years. The p-scores for the country were -53% and -58% for 2020 and 2021 respectively. No region recorded excess all-age malaria mortality in 2020, rather significant reduction. Stratified by age, Greater Accra region reported 90% higher than expected deaths among persons aged five years and above in 2020 (p-score = 90%, 95% CI: 21-159). All regions reported reduction in under-five mortality in 2020. No significant excess malaria mortalities were reported among the regions in 2021. CONCLUSION: Although negative p-scores suggested a decline in malaria mortalities nationwide, some regions recorded excess deaths during the COVID-19 pandemic era. There is a need to integrate COVID-19 control activities with malaria control and prevention efforts to mitigate the impact of COVID-19 on malaria case management and mortality.

Interfacial Electronic States of GeC/g-C3N4 van der Waal Heterostructure with Promising Photocatalytic Activity via Hydrogenation.

The bandgap of most known two-dimensional materials can be tuned by hydrogenation, although certain 2D materials lack a sufficient wide bandgap. Currently, it would be perfect to design non-toxic, low-cost, and high-performance photocatalysts for photocatalytic water splitting via hydrogenation. We systematically examine the impact of hydrogenation on the optical and electronic characteristics of GeC/g-C3N4 vdW heterostructures (vdWHs) with four different stacking patterns using first-principles calculations. The phonon spectra, interlayer distance, binding energies and ab initio molecular dynamics calculations show the kinetic, mechanical, and thermal stability of GeC/g-C3N4 vdWH after hydrogenation at 300, 500 and 800 K and possesses anisotropic Poisson's ratio, Young's and bulk modulus, suggesting that it's a promising candidate for experimental fabrication. According to an investigation of its electronic properties, GeC/g-C3N4 vdWH has a bandgap of 1.28 eV, but hydrogenation dramatically increases it to 2.47 eV. As a result of interface-induced electronic doping, the electronic states in g-C3N4 might be significantly adjusted by coming into contact with hydrogenated GeC sheets. The vdWH exhibits a type-II semiconductor, which can enhance the spatial separation of electron-hole pairs and has a strong red-shift of absorption coefficient than those of the constituent monolayers. The high potential drop caused by the significant valence and conduction band offsets effectively separated the charge carriers. The absorption coefficient of GeCH2/g-C3N4 vdWH is highly influenced by a biaxial compressive strain more than the biaxial tensile strain. Our theoretical research implies that the hydrogenated GeCH2/g-C3N4 vdWH possesses tunable optical and electronic behaviour for use as a hole-transport material in solar energy harvesting, nanoelectronic and optoelectronic devices.

"If You Need a Psychiatrist, It's BAD": Stigma Associated with Seeking Mental Health Care Among Obstetric Providers in Ghana.

Purpose: Globally, the COVID-19 pandemic has brought attention to the impact of negative patient outcomes on healthcare providers. In Ghana, obstetric providers regularly face maternal and neonatal mortality, yet limited research has focused on provision of mental health support for these providers. This study sought to understand how obstetric providers viewed seeking mental health support after poor clinical outcomes, with a focus on the role of mental health stigma. Patients and Methods: Participants were 52 obstetric providers (20 obstetrician/gynecologists and 32 midwives) at two tertiary care hospitals in Ghana. Five focus groups, led by a trained facilitator and lasting approximately two hours, were conducted to explore provider experiences and perceptions of support following poor maternal and neonatal outcomes. Discussions were audiotaped and transcribed verbatim, then analyzed qualitatively using grounded theory methodology. Results: Most participants (84.3%, N=43) were finished with training, and 46.2% (N=24) had been in practice more than 10 years. Emerging themes included pervasive stigma associated with seeking mental health care after experiencing poor clinical outcomes, which was derived from two overlapping dimensions. First, societal-level stigma resulted from a cultural norm to keep emotions hidden, and the perception that psychiatry is equated with severe mental illness. Second, provider-level stigma resulted from the belief that healthcare workers should not have mental health problems, a perception that mental health care is acceptable for patients but not for providers, and a fear about lack of confidentiality. Despite many providers acknowledging negative mental health impacts following poor clinical outcomes, these additive layers of stigma limited their willingness to engage in formal mental health care. Conclusion: This study demonstrates that stigma creates significant barriers to acceptance of mental health support among obstetric providers. Interventions to support providers will need to respect provider concerns without reinforcing the stigma associated with seeking mental health care.

Epidemiology of Maternal Nutritional Status and Risk of Adverse Birth Outcomes in Undernourished Mothers with Sickle Cell Disease: A Systematic Review and Meta-Analysis Protocol.

In pregnancies complicated by sickle cell disease (SCD), the maternal-fetal dyad is at high risk for mortality and morbidity. In healthy pregnancies, maternal nutritional status is a critical factor for the healthy growth and development of the fetus. However, there are no reviews of the current research on the nutritional status of pregnant women with SCD and pregnancy outcomes. First, we aim to assess the burden of malnutrition in pregnant women with SCD. Next, we aim to systematically evaluate if pregnant women with SCD who have poor nutritional status are at increased risk for adverse birth outcomes compared to pregnant women with sickle cell disease and normal nutritional status. We will systematically search multiple electronic databases. Our exposure is pregnant women with SCD and poor nutritional status. The primary outcomes of interest include low birth weight (categorical) and birth weight z-scores (continuous). We will also evaluate maternal and perinatal outcomes as secondary outcomes. We will evaluate the risk of bias and overall certainty of evidence with Risk of Bias in Non-randomized Studies-of Interventions (ROBINS-I), and the overall evidence will be assessed using Grading of Recommendation Assessment, Development, and Evaluation (GRADE) criteria. We will pool findings with a meta-analysis if sufficient homogeneity exists among studies. Findings will be published in a peer-reviewed journal and disseminated to SCD advocacy groups. PROSPERO registration number: 429412.

Impact of antenatal care on severe maternal and neonatal outcomes in pregnancies complicated by preeclampsia and eclampsia in Ghana.

OBJECTIVES: To explore how specific measures of antenatal care utilization are associated with outcomes in pregnancies complicated by preeclampsia and eclampsia in Ghana. STUDY DESIGN: Participants were adult pregnant women with preeclampsia or eclampsia at a tertiary hospital in Ghana. Antenatal care utilization measures included timing of first visit, total visits, facility and provider type, and referral status. Antenatal visits were characterized by former and current World Health Organization recommendations, and by gestational age-based adequacy. MAIN OUTCOME MEASURES: Composites of maternal complications and poor neonatal outcomes. Multivariate logistic regressions identified associations with antenatal care factors. RESULTS: Among 1176 participants, median number of antenatal visits was 5.0 (IQR 3.0-7.0), with 72.9% attending ≥4 visits, 19.4% attending ≥8 visits, and 54.9% attending adequate visits adjusted for gestational age. Care was most frequently provided in a government polyclinic (n = 522, 47.2%) and by a midwife (n = 704, 65.1%). Odds of the composite maternal complications were lower in women receiving antenatal care at a tertiary hospital (aOR 0.47, p = 0.01). Odds of poor neonatal outcomes were lower in women receiving antenatal care at a tertiary hospital (aOR 0.56, p < 0.001), by a specialist Obstetrician/Gynecologist (aOR 0.58, p < 0.001), and who attended ≥8 visits (aOR 0.67, p = 0.04). Referred women had twice the odds of a maternal complication (aOR 2.12, p = 0.007) and poor neonatal outcome (aOR 1.68, p = 0.002). CONCLUSIONS: Fewer complications are seen after receiving antenatal care at tertiary facilities. Attending ≥8 visits reduced poor neonatal outcomes, but didn't impact maternal complications. Quality, not just quantity, of antenatal care is essential.

Ability and accuracy of patient-performed blood pressure monitoring among pregnant women in urban Ghana.

BACKGROUND: Patient-performed blood pressure monitoring in pregnancy is rarely performed in low- and middle-income country settings, including Ghana. The clinical efficacy of home blood pressure monitoring relies on a pregnant patient being able to independently execute the correct steps to position and use a blood pressure monitor and to achieve accurate blood pressure measurements. OBJECTIVE: This study aimed to (1) assess whether pregnant women can correctly use an automatic blood pressure monitor to check their blood pressure before and after a brief training and (2) determine whether blood pressure values measured by pregnant women using an automatic monitor are similar to values measured by a healthcare provider using a standard clinic monitor. STUDY DESIGN: This was a cross-sectional study conducted at the Korle Bu Teaching Hospital, a tertiary hospital in Accra, Ghana. Participants were adult pregnant women presenting for their first prenatal care visit. Data collection was performed by 2 Ghanaian physicians. Information on demographics, obstetrical history, and past medical history was collected. A brief training was provided on the correct use of the blood pressure monitor, including a verbal script, annotated photographs, and a hands-on demonstration. Pre- and posttraining assessments using a 9-item checklist of correct preparation, position, and use of an automatic blood pressure monitor were performed. Following a modified British Hypertension Society protocol, a series of 4 blood pressure measurements were taken, alternating between provider performed using a clinic monitor and patient performed using an automatic monitor intended for individual use and validated in pregnancy. RESULTS: Among 176 participants, the mean age was 31.5 years (±5.6), and 130 (73.9%) were multiparous. Regarding socioeconomic characteristics, 128 (72.7%) were married, 171 (97.2%) had public insurance, and 87 (49.7%) had completed ≤9 years of formal education. Regarding clinical blood pressure issues, 19 (10.9%) had a history of a hypertensive disorder in a previous pregnancy, and 6 (3.4%) had chronic hypertension. Before receiving any training, 21 participants (12.1%) performed all 9 steps correctly to prepare, position, and use the automatic blood pressure monitor. Comparing pretraining vs posttraining ability, statistically significant increases were seen in the correct performance of each step and the mean number of steps performed correctly (6.1±1.8 vs 9.0±0.2, respectively; P<.001) and proportion performing all 9 steps correctly (12.1% vs 96.6%, respectively; P<.001). The mean difference between doctor-performed and patient-performed blood pressure measurements was 5.6±4.8 mm Hg for systolic blood pressure values and 3.4±3.08 mm Hg for diastolic blood pressure values, with most differences within 5 mm Hg for both systolic blood pressure values (102/176 [58.0%]) and diastolic blood pressure values (141/176 [80.1%]). CONCLUSION: After a brief training, pregnant women in Ghana demonstrated that they are able to use an automatic blood pressure monitor to check their blood pressure correctly and accurately.

Corrigendum: Perinatal autopsy in Ghana: healthcare workers knowledge and attitude.

[This corrects the article DOI: 10.3389/fgwh.2022.1021474.].

MHC class II genes mediate susceptibility and resistance to coronavirus infections in bats.

Understanding the immunogenetic basis of coronavirus (CoV) susceptibility in major pathogen reservoirs, such as bats, is central to inferring their zoonotic potential. Members of the cryptic Hipposideros bat species complex differ in CoV susceptibility, but the underlying mechanisms remain unclear. The genes of the major histocompatibility complex (MHC) are the best understood genetic basis of pathogen resistance, and differences in MHC diversity are one possible reason for asymmetrical infection patterns among closely related species. Here, we aimed to link asymmetries in observed CoV (CoV-229E, CoV-2B and CoV-2Bbasal) susceptibility to immunogenetic differences amongst four Hipposideros bat species. From the 2072 bats assigned to their respective species using the mtDNA cytochrome b gene, members of the most numerous and ubiquitous species, Hipposideros caffer D, were most infected with CoV-229E and SARS-related CoV-2B. Using a subset of 569 bats, we determined that much of the existent allelic and functional (i.e. supertype) MHC DRB class II diversity originated from common ancestry. One MHC supertype shared amongst all species, ST12, was consistently linked to susceptibility with CoV-229E, which is closely related to the common cold agent HCoV-229E, and infected bats and those carrying ST12 had a lower body condition. The same MHC supertype was connected to resistance to CoV-2B, and bats with ST12 were less likely be co-infected with CoV-229E and CoV-2B. Our work suggests a role of immunogenetics in determining CoV susceptibility in bats. We advocate for the preservation of functional genetic and species diversity in reservoirs as a means of mitigating the risk of disease spillover.

Challenges to diagnosing and managing preeclampsia in a low-resource setting: A qualitative study of obstetric provider perspectives from Ghana.

Preeclampsia is a leading cause of global maternal morbidity and mortality. The greatest burden of disease is in low- and middle-income countries where healthcare providers face significant, understudied, challenges to diagnosing and managing preeclampsia. This qualitative study used semi-structured interviews to explore the challenges of diagnosing and managing preeclampsia from the perspectives of obstetric doctors. Participants were doctors who provide obstetric care at the Korle Bu Teaching Hospital, an urban tertiary hospital in Ghana. Purposive sampling identified doctors with meaningful experience in managing patients with preeclampsia. Thematic saturation of data was used to determine sample size. Interviews were audio recorded, transcribed verbatim, coded using an iteratively-developed codebook, and thematically analyzed. Interviews were conducted with 22 participants, consisting of 4 house officers, 6 junior obstetrics/gynecology residents, 8 senior obstetrics/gynecology residents, and 4 obstetrics/gynecology consultants. Doctors identified critical challenges faced at the patient, provider, and systems levels in detecting and managing preeclampsia, each of which mediates the health outcomes of a pregnancy complicated by preeclampsia. Challenges centered around three overarching global themes: (1) low education levels and health literacy among women, (2) insufficient number of healthcare providers highly trained in obstetric care, and (3) inadequate health infrastructure to support critically ill patients with preeclampsia. Recognizing and addressing root challenges to preeclampsia care has great potential to improve outcomes in pregnancies complicated by preeclampsia in low-resource settings.

Diversity of cervicovaginal human papillomavirus (HPV) genotypes and naturally occurring E6/E7 DNA polymorphisms of HPV-16 in Ghana.

Human papillomavirus (HPV) E6 and E7 oncogene expression is essential for cervical carcinogenesis. Evidence exists that E6/E7 variants may have different transforming activities while the risk of HPV-16 variants (A/D) differs by race/ethnicity. We determined the type-specific diversity of HPV infection in women with high grade cervical disease or cervical cancer in Ghana and investigated naturally occurring E6/E7 DNA variants in this population. HPV genotyping was carried out on 207 cervical swab samples collected from women referred to a gynaecology clinic at two teaching hospitals in Ghana. HPV-16, HPV-18 and HPV-45 were detected in 41.9%, 23.3% and 16.3% of cases respectively. HPV-16 E6/E7 DNA sequencing was performed in 36 samples. Thirty samples contained E6/E7 variants of the HPV-16-B/C lineage. 21/36 samples were of the HPV-16C1 sublineage variant and all contained the E7 A647G(N29S) single nucleotide polymorphism (SNP). This study reveals the diversity of E6/E7 DNA and the dominance of HPV16 B/C variants in cervicovaginal HPV infection in Ghana. Type-specific HPV diversity analysis indicates that most Ghanaian cervical disease cases are vaccine preventable. The study provides an important baseline from which for the impact of vaccine and antivirals on clinically relevant HPV infection and associated disease can be measured.

Most adults with severe HbSC disease are not treated with hydroxyurea.

Sickle cell hemoglobin SC (HbSC) disease is the second most frequent sickle cell disease (SCD) genotype after sickle cell anemia (HbSS). Globally, ∼55 000 newborns with HbSC are delivered annually, with the highest HbC gene frequency in West Africa. In Ghana, 40% of adults visiting the Ghana Institute of Clinical Genetics SCD clinic have HbSC. Unlike HbSS, hydroxyurea use is not routinely recommended for individuals with HbSC because of the perceived high-risk to benefit ratio. To test the hypothesis that at least 5% of adults with HbSC will meet the American Society of Hematology criteria for severe disease, we conducted a retrospective descriptive cohort study of all individuals with HbSC (≥18 years) who visited the clinic in 2019. Adults with HbSC aged from 18 to 45 years were selected. We identified a comparison group of 639 individuals with HbSS and matched the frequency based on the age and sex of individuals with HbSC. Severe disease was defined as a history of ≥3 SCD-associated moderate or severe pain episodes per year, history of acute chest syndrome, and severe symptomatic chronic anemia that interferes with daily activities or quality of life. The study end points were the proportion of individuals with SCD who met the definition of severe disease and were eligible for hydroxyurea. In total, 64 of 639 (10.0%) individuals with HbSC met the eligibility criteria for hydroxyurea therapy compared with 154 of 639 (24.1%) individuals with HbSS. Less than 1% and 3% of individuals with severe HbSC and HbSS, respectively, were routinely prescribed with hydroxyurea in this tertiary care medical center.

Benefits and barriers of home blood pressure monitoring in pregnancy: perspectives of obstetric doctors from a Ghanaian tertiary hospital.

BACKGROUND: Delayed diagnosis of preeclampsia contributes to maternal morbidity and mortality. Patient-performed home blood pressure monitoring facilitates more frequent monitoring and earlier diagnosis. However, challenges may exist to implementation in low- and middle income-countries. METHODS: This cross-sectional mixed methods study evaluated obstetric doctors' perspectives on the benefits of and barriers to the implementation of home blood pressure monitoring among pregnant women in Ghana. Participants were doctors providing obstetric care at Korle Bu Teaching Hospital. Electronic surveys were completed by 75 participants (response rate 49.3%), consisting of demographics and questions on attitudes and perceived benefits and challenges of home BP monitoring. Semi-structured interviews were completed by 22 participants to expand on their perspectives. RESULTS: Quantitative and qualitative results converged to highlight that the current state of blood pressure monitoring among pregnant women in Ghana is inadequate. The majority agreed that delayed diagnosis of preeclampsia leads to poor health outcomes in their patients (90.6%, n = 68) and earlier detection would improve outcomes (98.7%, n = 74). Key qualitative benefits to the adoption of home blood pressure monitoring were patient empowerment and trust of diagnosis, more quantity and quality of blood pressure data, and improvement in systems-level efficiency. The most significant barriers were the cost of monitors, lack of a communication system to convey abnormal values, and low health literacy. Overall, doctors felt that most barriers could be overcome with patient education and counseling, and that benefits far outweighed barriers. The majority of doctors (81.3%, n = 61), would use home BP data to inform their clinical decisions and 89% (n = 67) would take immediate action based on elevated home BP values. 91% (n = 68) would recommend home BP monitoring to their pregnant patients. CONCLUSION: Obstetric doctors in Ghana strongly support the implementation of home blood pressure monitoring, would use values to inform their clinical management, and believe it would improve patient outcomes. Addressing the most significant barriers, including cost of blood pressure monitors, lack of a communication system to convey abnormal values, and need for patient education, is essential for successful implementation.

Effect of intimate partner violence in pregnancy on maternal and perinatal outcomes at the Korle Bu teaching hospital, Ghana: An observational cross sectional study.

OBJECTIVE: To determine the association between intimate partner violence and pregnancy outcomes. METHODS: This was a descriptive study of sociodemographic characteristics of participants, their partners and intimate partner violence. Participants' delivery records were reviewed for additional medical and obstetric information and abused women and their neonates followed until discharge. χ2 and Student t test were used to assess associations, followed by logistic regression with odds ratio (OR) and 95% confidence intervals (CI). A value of P less than 0.05 was considered statistically significant. RESULTS: The study included 270 participants of whom 84 (31.1%) reported experiencing domestic violence during pregnancy. One hundred and fourteen (42%) had experienced domestic violence pre-pregnancy and 69 (60.5%) of these women experienced further domestic violence during pregnancy. Emotional violence was commonest 80/270 (29.6%) and no sexual violence was reported. Domestic violence declined from 42% (pre-pregnancy) to 31.1% (in-pregnancy) (P = 0.009). Risk factors during pregnancy were young age (15-24 years; OR 5.8, 95% CI1.65-20.38), nulliparity (OR 3.75, 95% CI 1.90-7.41), and partner's alcohol consumption (OR 5.04, 95% CI 2.50-10.13). Associated outcomes included late prenatal booking, gestational hypertension, and cephalopelvic disproportion. CONCLUSION: We found high prevalence of domestic violence during pregnancy, preponderance of emotional abuse, and decline of physical abuse. Nulliparity, younger age, and partner's alcohol consumption predicted abuse. Late-booking, gestational hypertension, cephalopelvic disproportion, and fetal distress were associated.

Response surface methodology as a tool to optimize the extraction of bioactive compounds from plant sources.

Response surface methodology (RSM) is a widely used mathematical and statistical technique for modeling and optimizing the process for the extraction of bioactive compounds. This review explains the optimization approach through the use of experimental design and empirical models for response prediction and the utilization of the desirability function for multiple response optimization. This paper also reviews recent studies on the application of RSM to optimize bioactive compound extraction processes such as conventional solvent extraction, microwave-assisted extraction, supercritical fluid extraction, and ultrasound-assisted extraction. Finally, the challenges associated with the use of RSM and the efforts made to improve RSM in the extraction process are also highlighted. Overall, this review informs many aspects of RSM that are occasionally ignored or insufficiently discussed with regard to the optimization of bioactive compound extraction processes, and it summarizes significant applications where RSM proved suitable. © 2022 Society of Chemical Industry.

Acute pain episodes, acute chest syndrome, and pulmonary thromboembolism in pregnancy.

Pregnancy in women with sickle cell disease (SCD) is a life-threatening condition. In both high- and low-income countries, there is an 11-fold increased risk of maternal death and a 4-fold increased risk of perinatal death. We highlight the epidemiology of SCD-specific and obstetric complications commonly seen during pregnancy in SCD and propose definitions for acute pain and acute chest syndrome (ACS) episodes during pregnancy. We conducted a systematic review of the recent obstetric and hematology literature using full research articles published within the last 5 years that reported outcomes in pregnant women with SCD. The prevalence of acute pain episodes during pregnancy ranged between 4% and 75%. The prevalence of ACS episodes during pregnancy ranged between 4% and 13%. The estimated prevalence of pulmonary thromboembolism in women with SCD during pregnancy is approximately 0.5 to 1%. ACS is the most common cause of death and is often preceded by acute pain episodes. The most crucial time to develop these complications in pregnancy is during the third trimester and postpartum period. In a pooled analysis from studies in low- and middle-income settings, maternal death in women with SCD is approximately 2393 and 4300 deaths per 100 000 live births with and without multidisciplinary care, respectively. In comparison, in the US and northern Europe, the general maternal mortality rate is approximately 23.8 and 8 deaths per 100 000 live births, respectively. A multidisciplinary SCD obstetrics care approach reduces maternal and perinatal morbidity and mortality in low- and middle-income countries.

Clinical presentation and predictors of eclampsia among women with hypertensive disorders of pregnancy in Ghana.

OBJECTIVES: Eclampsia is a leading contributor to global maternal morbidity and mortality. Past studies demonstrate varying relationships between demographic and antenatal factors and subsequent development of eclampsia. This study sought to identify predictors of eclampsia in a tertiary hospital in Ghana. STUDY DESIGN: Participants were women admitted to Korle Bu Teaching Hospital in Ghana with a diagnosis of preeclampsia with severe features or eclampsia. Medical and obstetric history were extracted from medical records. Clinical information, including vital signs and maternal complications, was prospectively collected. MAIN OUTCOME MEASURES: Bivariate analysis compared demographic, antenatal, obstetric history, and clinical characteristics between patients presenting with eclampsia and preeclampsia. Multivariable logistic regression identified independent predictors of eclampsia. RESULTS: Among 1,176 participants, 116 (9.9 %) had a diagnosis of eclampsia. The majority of women with eclampsia experienced their first seizure antepartum (68.7 %), in a location outside a health facility (56.5 %), and witnessed by a family member (55.9 %). Women with eclampsia had a median of 1.0 seizure (IQR 1.0, 2.0). Only 15 (12.9 %) had a prior diagnosis of preeclampsia. There was a nearly threefold increased odds of eclampsia in women aged <20 (aOR 2.75, 95 % CI 1.10-6.89, p = 0.03) and those with twin pregnancy (aOR 2.59, 95 % CI 1.26-5.32, p = 0.01). Decreased odds of eclampsia was observed with age ≥35 (aOR 0.32, 95 % CI 0.15-0.67, p = 0.002), obesity (aOR 0.44, 95 % CI 0.25-0.77, p = 0.004), and chronic hypertension (aOR 0.38, 95 % CI 0.17-0.86, p = 0.02). CONCLUSIONS: Understanding predictors of eclampsia is important to identify high-risk patients and make informed decisions about antenatal care.