Waldemar Naves Do Amaral

Prof. Dr. Waldemar Naves Do Amaral


Research Focus & Metrics

Academic Career Length

14Years (2013-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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18 January 2014 in BMC Infectious Diseases
Verified
Journal Article
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MAMariza M Avelino
Mariza M Avelino
WAWaldemar Naves Do Amaral
Waldemar Naves Do Amaral
IRIsolina Mx Rodrigues
Isolina Mx Rodrigues
ARAlan R Rassi
Alan R Rassi
MGMaria Bf Gomes
Maria Bf Gomes
ACAna M Castro
Ana M Castro
Control programs have been executed in an attempt to reduce vertical transmission and the severity of congenital infection in regions with a high incidence of toxoplasmosis in pregnant women. We aimed to evaluate whether treatment of pregnant women with spiramycin associated with a lack of monitoring for toxoplasmosis seroconversion affects the prognosis of patients.

24 November 2020 in Healthcare
Verified
Journal Article
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WAWaldemar Naves Do Amaral
Waldemar Naves Do Amaral
CMCarolina Leão de Moraes
Carolina Leão de Moraes
Ana Paula RodriguesAna Paula Rodrigues
Ana Paula Rodrigues
Matias NollMatias Noll
Matias Noll
Jalsi ArrudaJalsi Arruda
Jalsi Arruda
CMCarolina Rodrigues Mendonça
Carolina Rodrigues Mendonça
The coronavirus disease 2019 (COVID-19) pandemic is continuously affecting the lives of all people. Understanding the impact of COVID-19 on pregnancy in terms of morbidity, mortality, and perinatal maternal and fetal outcomes is essential to propose strategies for prevention and infection control. Here, we conducted a systematic review to investigate pregnant women infected with COVID-19 in terms of signs and symptoms, type of delivery, comorbidities, maternal and neonatal outcomes, and the possibility of vertical transmission. A search on Embase and PubMed databases was performed on 31 October 2020. Observational studies and case reports on pregnant women infected with COVID-19 were included without language restrictions. The 70 selected studies included a total of 1457 pregnant women diagnosed with COVID-19 in the first, second, and third trimesters of pregnancy. The most common signs and symptoms were fever, cough, and nausea. The most frequent comorbidities were obesity, hypertensive disorders, and gestational diabetes. Among maternal and fetal outcomes, premature birth (n = 64), maternal death (n = 15), intrauterine fetal death or neonatal death (n = 16), cases of intrauterine fetal distress (n = 28), miscarriage (n = 7), decreased fetal movements (n = 19), and severe neonatal asphyxia (n = 5) were the most frequent. Thirty-nine newborns tested positive for SARS-CoV-2. Additionally, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RNA was detected in the placenta (n = 13) and breast milk (n = 6). This review indicates that COVID-19 during pregnancy can result in maternal, fetal, and neonatal complications. In addition, SARS-CoV-2 viral exposure of neonates during pregnancy and delivery cannot be ruled out. Thus, we highlight the need for long-term follow-up of newborns from mothers diagnosed with COVID-19 to establish the full implications of SARS-CoV-2 infection in these children.

24 June 2014 in BMC Infectious Diseases
Verified
Journal Article
Open access
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IRIsolina Mx Rodrigues
Isolina Mx Rodrigues
TCTatiane L Costa
Tatiane L Costa
JAJuliana B Avelar
Juliana B Avelar
WAWaldemar Naves Do Amaral
Waldemar Naves Do Amaral
ACAna M Castro
Ana M Castro
MAMariza M Avelino
Mariza M Avelino
Background: The different laboratory methods used in the diagnosis of congenital toxoplasmosis have variable sensitivity and specificity. There is no evidence to prove that maternal treatment reduces the risk of fetal infection. The purpose of this study was to assess methods for the confirmation of congenital toxoplasmosis after maternal treatment with spiramycin during pregnancy, and to evaluate the effect of this treatment on clinical manifestations of the disease in newborns (NB).Methods: This was a community-based, cross-sectional study of acute toxoplasmosis in newborns at risk of acquiring congenital infection. Participating newborns were born in the Clinical Hospital Maternity Ward of the Federal University of Goiás. Eligible participants were divided into 2 groups: group 1 consisted of 44 newborns born to mothers treated with spiramycin during pregnancy and group 2 consisted of 24 newborns born to mothers not treated with spiramycin during pregnancy because the diagnosis of toxoplasmosis was not performed. The sensitivity and specifity of PCR forT. gondiiDNA in peripheral blood and serological testing for specific anti-T. gondiiIgM and IgA, and the effects of maternal spiramycin treatment on these parameters, were determined by associating test results with clinical manifestations of disease.Results: The sensitivity of the markers (T. gondiiDNA detected by PCR, and the presence of specific anti-T. gondiiIgM and IgA) for congenital toxoplasmosis was higher in group 2 than in group 1 (31.6, 68.4, 36.8% and 3.7, 25.9, 11.1% respectively). Even with a low PCR sensitivity, the group 2 results indicate the importance of developing new techniques for the diagnosis of congenital toxoplasmosis in newborns. Within group 1, 70.4% of the infected newborns were asymptomatic and, in group 2, 68.4% showed clinical manifestations of congenital toxoplasmosis.Conclusions: The higher proportion of infants without clinical symptoms in group 1 (70.4%) suggests the maternal treatment with spiramycin delays fetal infection, reducing the clinical sequelae of the disease in newborns. Given the low sensitivity of the tests used, when there is suspicion of congenital transmission several serological and parasitological tests are required in order to confirm or exclude congenital toxoplasmosis in newborns.

13 January 2023 in Children
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Journal Article
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NONayara Rodrigues Gomes de Oliveira
Nayara Rodrigues Gomes de Oliveira
Cibelle Kayenne Martins Roberto FORMIGACibelle Kayenne Martins Roberto FORMIGA
Cibelle Kayenne Martins Roberto FORMIGA
BRBruna Abreu Ramos
Bruna Abreu Ramos
RSRafaela Noleto dos Santos
Rafaela Noleto dos Santos
NMNayara Nubia de Sousa Moreira
Nayara Nubia de Sousa Moreira
WAWaldemar Naves Do Amaral
Waldemar Naves Do Amaral
Pain management is challenging in neonatal care. We aimed to compare the effects of gentle touch and sucrose on pain relief during suctioning in premature newborns (PTNB). This crossover randomized clinical trial enrolled PTNBs with low birth weight, hemodynamically stable, and requiring suctioning during hospitalization in the neonatal intensive care unit. PTNBs underwent three different suctioning procedures. The first was performed without intervention (baseline). Right after, PTNBs were randomly allocated (sucrose and gentle touch or vice versa) to the next two suctioning procedures. Two validated scales assessed pain: the Neonatal Infant Pain Scale (NIPS) and the Premature Infant Pain Profile-Revised (PIPP-R). We evaluated 50 PTNBs (mean of 28 weeks) with a mean low birth weight of 1050 g; most were under continuous positive airway pressure 37 (74%) and mechanical ventilation 41 (82%). Gentle touch was efficacious for pain relief since NIPS (p = 0.010) compared to baseline. Sucrose was also effective in reducing pain NIPS and PIPP-R (p < 0.001). Although the two interventions reduced pain, no difference was observed between gentle touch and sucrose.

28 December 2022 in Vaccines
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VCVergílio Pereira Carvalho
Vergílio Pereira Carvalho
JPJoão Paulo Jordão Pontes
João Paulo Jordão Pontes
DNDemócrito Ribeiro de Brito Neto
Demócrito Ribeiro de Brito Neto
CBCelso Eduardo Rezende Borges
Celso Eduardo Rezende Borges
GCGisele Ribeiro Londe Campos
Gisele Ribeiro Londe Campos
WAWaldemar Naves Do Amaral
Waldemar Naves Do Amaral
The novel virus severe acute respiratory syndrome coronavirus 2 (SARS-COV-2) is highly virulent and causes coronavirus disease 2019 (COVID-19), resulting in high morbidity and mortality mainly associated with pulmonary complications. Because this virus is highly transmissible, it was quickly spread globally, resulting in COVID-19 being declared as a pandemic. This study aimed to analyze the prevalence of mortality and the factors related to mortality due to COVID-19 in patients with severe acute respiratory syndrome (SARS) at a university hospital in the Central—West region of Brazil. This retrospective cross-sectional study was based on an analysis of the medical records of patients with SARS aged >18 years and admitted to an intensive care unit due to COVID-19 with the requirement of invasive mechanical ventilation. Hospital death was considered as an outcome variable in this study. Moreover, demographic and lifestyle-related variables as well as the therapeutic measures used during the hospital stay were recorded and correlated with the death outcome. After excluding 188 medical records, 397 were analyzed. Most of the participants were men (59.7%), and the mortality rate in patients with SARS due to COVID-19 was 46.1%. Multiple regression analysis indicated that the independent factors associated with mortality in patients with SARS due to COVID-19 were the age of >60 years (p < 0.001) and the use of azithromycin (p = 0.012). Protective factors for mortality were considered as not having the following diseases: hyperthyroidism, asthma, hepatic inheritance, and not being a smoker. The mortality rate in patients with SARS due to COVID-19 was associated with older age and the use of azithromycin.

24 July 2024 in Children
Verified
Journal Article
Open access
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BRBruna Abreu Ramos
Bruna Abreu Ramos
CFCibelle Formiga
Cibelle Formiga
NONayara Rodrigues Gomes de Oliveira
Nayara Rodrigues Gomes de Oliveira
PMPatricia Gonçalves Evangelista Marçal
Patricia Gonçalves Evangelista Marçal
RFRui Gilberto Ferreira
Rui Gilberto Ferreira
WAWaldemar Naves Do Amaral
Waldemar Naves Do Amaral
Background: Preterm birth and prolonged neonatal hospitalization are potential sources of stress for mothers of preterm and low birth weight infants. Aim: To evaluate maternal stress and its association with neurobehavioral indicators of preterm infants during hospitalization in the neonatal intensive care unit. Methods: A cross-sectional study was conducted in a neonatal intensive care unit of a hospital in Goiânia, Brazil. The study included preterm and low birth weight infants of both genders and their mothers. The Parental Stressor Scale: Neonatal Intensive Care Unit and the Neurobehavioral Assessment of the Preterm Infant were respectively applied to mothers and infants in the neonatal intensive care unit. Results: The study involved 165 premature infants and their mothers. The mean age of the mothers was 26.3 years and most had a high school education level (57.6%). Mothers perceived the experience of having an infant in the neonatal intensive care unit as moderately stressful (2.96 ± 0.81). The parental role alteration (4.11 ± 1.03) and sights and sounds (2.15 ± 0.90) subscales exhibited the highest and lowest stress levels, respectively. Significant correlations (rho < −0.3; p < 0.05) were found between maternal stress and neurobehavioral indicators of infants. In the multivariate analysis, low leg tone was a predictor of higher maternal stress. Low tone and limited arm movement were predictors of higher maternal stress in the maternal role item. Conclusions: The experience of having a preterm infant hospitalized was considered moderately stressful for mothers. Maternal stress levels were significantly correlated with low scores on neonatal neurobehavioral indicators.