Publications by authors named "Joao P Souza"

Background: Infections and sepsis are leading causes of morbidity and mortality in women during pregnancy and the post-pregnancy period. Using data from the 2017 WHO Global Maternal Sepsis Study, we explored the use of early warning systems (EWS) in women at risk of sepsis-related severe maternal outcomes.

Methods: On April 27, 2023, we searched the literature for EWS in clinical use or research in obstetric populations.

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Phenotypic plasticity may allow plant species to cope with environmental variability that influences plant growth and may limit the distribution of a species. The present study investigated the morphophysiology and phenotypic plasticity responses due to light and water variability of young Dimorphandra exaltata plants, an endemic threatened tree from the Atlantic Forest. After emergence, plants were grown in two light conditions: shading (70%) and full sun.

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Article Synopsis
  • - The study explores the effects of lithium ore tailings (LOT) on the growth and photosynthesis of four tree species, highlighting the environmental challenges associated with lithium mining.
  • - Results show that LOT negatively impacts growth by reducing stem and root length as well as biomass, while also affecting nutrient absorption and chlorophyll levels.
  • - Among the species studied, Hymenaea courbaril and H. stigonocarpa demonstrated greater tolerance to LOT, with H. courbaril showing potential for phytoextraction of lithium and manganese, suggesting their usefulness in rehabilitating degraded areas.
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  • The study investigates pregnancy-related infections among hospitalized women in 52 countries, analyzing clinical and microbiological characteristics, as well as antibiotic use based on infection sources and economic status.
  • Among the 1,456 women studied, genital infections (51.2%) and urinary tract infections (36.5%) were the most common, with Escherichia coli identified as the major uropathogen.
  • Significant delays in antibiotic administration were noted, with cephalosporins being the most frequently used for urinary tract infections, while metronidazole was predominant in lower-income countries.
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Maternal outcomes throughout pregnancy, childbirth, and the postnatal period are influenced by interlinked and interdependent vulnerabilities. A comprehensive understanding of how various threats and barriers affect maternal and perinatal health is critical to plan, evaluate and improve maternal health programmes. This paper builds on the introductory paper of the Series on the determinants of maternal health by assessing vulnerabilities during pregnancy, childbirth, and the postnatal period.

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Background: The near miss concept, denoting near collisions between aircraft, originated in aeronautics, but has recently been transferred to the neonatal context as a way of evaluating the quality of health services for newborns, especially in settings with reduced child mortality. However, there is yet no consensus regarding the underlying criteria. The most common indicators used to assess health care quality include mortality (maternal and neonatal) and life-threatening conditions.

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The reduction of maternal mortality and the promotion of maternal health and wellbeing are complex tasks. This Series paper analyses the distal and proximal determinants of maternal health, as well as the exposures, risk factors, and micro-correlates related to maternal mortality. This paper also examines the relationship between these determinants and the gradual shift over time from a pattern of high maternal mortality to a pattern of low maternal mortality (a phenomenon described as the maternal mortality transition).

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Over the past three decades, substantial progress has been made in reducing maternal mortality worldwide. However, the historical focus on mortality reduction has been accompanied by comparative neglect of labour and birth complications that can emerge or persist months or years postnatally. This paper addresses these overlooked conditions, arguing that their absence from the global health agenda and national action plans has led to the misconception that they are uncommon or unimportant.

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Access to emergency obstetric care, including assisted vaginal birth and caesarean birth, is crucial for improving maternal and childbirth outcomes. However, although the proportion of births by caesarean section has increased during the last few decades, the use of assisted vaginal birth has declined. This is particularly the case in low- and middle-income countries, despite an assisted vaginal birth often being less risky than caesarean birth.

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Background: Resilience reflects coping with pregnancy-specific stress, including physiological adaptations of the maternal organism or factors arising from the socioeconomic context, such as low income, domestic violence, drug and alcohol use, lack of a support network and other vulnerability characteristics. Resilience is a dynamic characteristic that should be comparatively evaluated within a specific context; its association with perceived stress and social vulnerability during pregnancy is still not fully understood. This study aimed at exploring maternal resilience, perceived stress and social vulnerability during pregnancy and its associated factors and outcomes.

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The past 20 years witnessed an invigoration of research on labor progression and a change of thinking regarding normal labor. New evidence is emerging, and more advanced statistical methods are applied to labor progression analyses. Given the wide variations in the onset of active labor and the pattern of labor progression, there is an emerging consensus that the definition of abnormal labor may not be related to an idealized or average labor curve.

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The WHO ACTION-I trial, the largest placebo-controlled trial on antenatal corticosteroids (ACS) efficacy and safety to date, reaffirmed the benefits of ACS on mortality reduction among early preterm newborns in low-income settings. We discuss here lessons learned from ACTION-I trial that are relevant to a strategy for ACS implementation to optimize impact. Key elements included (i) gestational age dating by ultrasound (ii) application of appropriate selection criteria by trained obstetric physicians to identify women with a likelihood of preterm birth for ACS administration; and (iii) provision of a minimum package of care for preterm newborns in facilities.

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Introduction: Maternal near miss (MNM) is a useful means to examine quality of obstetric care. Since the introduction of the WHO MNM criteria in 2011, it has been tested and validated, and is being used globally. We sought to systematically review all available studies using the WHO MNM criteria to develop global and regional estimates of MNM frequency and examine its application across settings.

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We conducted a prospective cohort study in a population with diverse ethnic backgrounds from Brazil to assess clinically meaningful symptoms after surviving coronavirus disease. For most of the 175 patients in the study, clinically meaningful symptoms, including fatigue, dyspnea, cough, headache, and muscle weakness, persisted for >120 days after disease onset.

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This study investigated the factors associated with serious maternal morbidity (SMM) in women seen at public maternity hospitals in Ribeirão Preto, São Paulo State, Brazil. This was a cross-section analytical quantitative study. Participation included 1,098 postpartum women who had given birth at one of the four maternity hospitals in the municipality.

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Article Synopsis
  • * It included over 255,000 women from 26 LMICs, revealing that PLCS rates varied significantly by country and were more common among wealthier and more educated populations.
  • * Findings showed that PLCS is linked to higher neonatal mortality rates, reduced early breastfeeding, and longer hospital stays, suggesting adverse perinatal outcomes compared to vaginal deliveries.
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Objective: To compare the 14-item Resilience Scale (RS-14) and the original 25-item scale (RS-25) in the obstetric population, including vulnerable and non-vulnerable women.

Methods: A Brazilian prospective cohort study was conducted of nulliparous singleton pregnant women from March 2018 to March 2020. Women who completed the RS-25 at 27-29 weeks of pregnancy were included in the analysis.

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Objective: To investigate gender inequity in the scientific production of the University of Sao Paulo.

Methods: Members of the University of Sao Paulo faculty are the study population. The Web of Science repository was the source of the publication metrics.

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Article Synopsis
  • The study, part of the Global Maternal Sepsis Study, examined neonatal near-miss rates and perinatal death in women with infections during pregnancy in low-income and middle-income countries.
  • Conducted in 408 hospitals across 43 countries, it followed births from women suspected or confirmed to have infections after 28 weeks of gestation, tracking outcomes for both the mothers and their babies for a week postpartum.
  • Results showed that 25.9% experienced neonatal near-miss and 10.1% faced perinatal death; key risk factors included maternal pre-existing medical conditions and infections during labor or shortly after childbirth, highlighting significant health risks for both mothers and infants.
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Background: Infections are among the leading causes of maternal mortality and morbidity. The Global Maternal Sepsis and Neonatal Initiative, launched in 2016 by WHO and partners, sought to reduce the burden of maternal infections and sepsis and was the basis upon which the Global Maternal Sepsis Study (GLOSS) was implemented in 2017. In this Article, we aimed to describe the availability of facility resources and services and to analyse their association with maternal outcomes.

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Objective: To evaluate the predictive capacity of vital signs for the diagnosis of postpartum hemorrhage (PPH).

Methods: A prospective cohort study performed at the University of Campinas, Brazil, between February 2015 and March 2016 with women who delivered vaginally. Vital signs and postpartum bleeding were collected over 24 h.

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Article Synopsis
  • This study assessed the prevalence of SARS-CoV-2 infections in Ribeirão Preto, Brazil, through a household survey conducted in two phases with a total of 1,355 participants.
  • During the first phase, RT-PCR tests showed a 0.14% positivity rate, while serological tests revealed 1.27%, increasing to 2.79% in the second phase, with higher infection rates found in larger households.
  • The cumulative infection rate by mid-June 2020 was estimated at 2.37%, equivalent to around 16,670 people, with an infection fatality rate of 0.41%, indicating that a significant portion of cases went unreported.
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