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INTRODUCTION: Hepatitis C virus (HCV) can be vertically transmitted from mother to fetus. We evaluated knowledge about HCV vertical transmission in female blood donors who became pregnant following detection of HCV in their donated blood. METHODS: This was a retrospective descriptive study of females seen at a single blood bank in Sao Paulo, Brazil who were diagnosed with HCV infection in their donated blood. HCV-infected donors who subsequently became pregnant were invited to participate through letters or phone calls. Individuals who agreed to participate were interviewed by questionnaire to evaluate their knowledge on HCV vertical transmission. RESULTS: Among 282 HCV-positive female blood donors, 69 reported becoming pregnant after their HCV diagnosis in donated blood. While 24 of these women were successful treated for their infection prior to becoming pregnant, 45 (65.2%) were at risk for vertical HCV transmission either because they had never been treated for HCV, were pregnant before treatment or became pregnant after unsuccessful treatment. Of the 59 women who responded to the question of whether they were informed about the risk of HCV vertical transmission, 58 (98.3%) reported never receiving this information either after obtaining their blood donation results or during their pregnancy. CONCLUSION: The lack of knowledge of HCV-infected women on the possibility for mother-to-child transmission of this virus highlights the critical need to improve communication about pregnancy-related risks between health professionals and HCV-infected women of childbearing age.

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ABSTRACT Introduction Hepatitis C virus (HCV) can be vertically transmitted from mother to fetus. We evaluated knowledge about HCV vertical transmission in female blood donors who became pregnant following detection of HCV in their donated blood. Methods This was a retrospective descriptive study of females seen at a single blood bank in Sao Paulo, Brazil who were diagnosed with HCV infection in their donated blood. HCV-infected donors who subsequently became pregnant were invited to participate through letters or phone calls. Individuals who agreed to participate were interviewed by questionnaire to evaluate their knowledge on HCV vertical transmission. Results Among 282 HCV-positive female blood donors, 69 reported becoming pregnant after their HCV diagnosis in donated blood. While 24 of these women were successful treated for their infection prior to becoming pregnant, 45 (65.2%) were at risk for vertical HCV transmission either because they had never been treated for HCV, were pregnant before treatment or became pregnant after unsuccessful treatment. Of the 59 women who responded to the question of whether they were informed about the risk of HCV vertical transmission, 58 (98.3%) reported never receiving this information either after obtaining their blood donation results or during their pregnancy. Conclusion The lack of knowledge of HCV-infected women on the possibility for mother-to-child transmission of this virus highlights the critical need to improve communication about pregnancy-related risks between health professionals and HCV-infected women of childbearing age.

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OBJECTIVES: COVID-19 is a viral transmissible disease and there is limited evidence on vertical transmission and prevalence of SARS-CoV-2 during pregnancy, birth, and the postnatal period. This descriptive cross-sectional study aimed to evaluate the possible perinatal transmission of SARS-CoV-2 in mothers and neonates in a Mexican population. METHODS: A total of 133 nasopharyngeal swab samples from mothers, 131 swab samples from neonates, and 140 colostrum samples were obtained, and the presence of SARS-CoV-2 was determined by qPCR. RESULTS: One in eight asymptomatic 38-39 weeks' pregnant women were positive for the presence of SARS-CoV-2 in nasopharyngeal swabs taken just before delivery; and one in 12 nasopharyngeal swabs collected from neonates immediately after delivery without breast feeding were also positive. It was also determined that one in 47 colostrum/milk samples were positive for the test. In addition, there was no association between positive results and any collected metadata of mothers or newborns. CONCLUSIONS: Asymptomatic women carried the SARS-CoV-2 virus during delivery, with perinatal transmission of SARS-CoV-2 to newborns. Since neonates were sampled immediately after birth, the detection of positive cases might be due to infection by the virus in utero.

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Resumen La transmisión vertical de hepatitis B es responsable de 50% de las infecciones en el mundo e implica 90% de riesgo de evolucionar a hepatitis crónica y sus complicaciones. La inmunoprofilaxis postparto (inmunoglobulina más vacuna) es la medida de prevención más efectiva. Sin embargo, puede existir fracaso a pesar de dicha intervención, debido a factores como alta carga viral o la presencia de HBeAg en la madre, los que sólo pueden evitarse si se hace el diagnóstico y tratamiento durante la gestación. En Chile, en el año 2019 se incorporó la vacunación en los recién nacidos, pero no existe aún cribado durante el embarazo, a diferencia de los países desarrollados. En los últimos años se ha experimentado un aumento acelerado de inmigración proveniente principalmente de América latina y el Caribe, con prevalencias altas en algunos de ellos. Chile debiese avanzar prontamente hacia el cribado de hepatitis B en embarazo.

Abstract Half of cases of hepatitis B around the world are produced from vertical transmission; and 90% of them can evolve to chronic hepatitis and their long term complications. Postpartum immunoprophylaxis (immunoglobulin and vaccine) is the most effective preventive measure. However, despite this prophylaxis, vertical transmission is possible if the mother presents a high viral load or e-antigen. This risk can be reduced only if screening during pregnancy and treatment if needed, are incorporated. In 2019, vaccination for hepatitis B in newborn was incorporated in Chile, but not yet prenatal screening, unlike developed countries. Chile has experienced a growth in immigration from Latin America and Caribbean, some countries with high endemicity included. Prenatal screening in Chile should be promptly incorporated.

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Few studies have compared the clinical efficacy and adverse events of combined antiretroviral therapy (cART) regimens in pregnant women seeking obstetrical care. The objective of this study was to compare the efficacy (virus load response), adverse events, and obstetrical and neonatal outcomes of three different regimens of cART in HIV-infected pregnant women initiating treatment in Rio de Janeiro, Brazil. This was a retrospective cohort study of cART-naive pregnant women who initiated either ritonavir-boosted protease inhibitors (atazanavir or lopinavir), efavirenz, or raltegravir plus a backbone regimen. From 2014 to 2018, 390 pregnant women were followed over time. At baseline, the median viral load (VL) for HIV was 4.1 log copies/ml. Among participants who received cART for 2 to 7 weeks, the VL decline was greater for raltegravir (2.24 log copies/ml) than for efavirenz or protease inhibitors (P < 0.001). Virologic suppression was achieved in 87% of women on raltegravir near delivery versus 73% on efavirenz and 70% on protease inhibitors (P = 0.011). Patients on raltegravir achieved virologic suppression faster than those on other regimens (P = 0.019). Overall, the HIV perinatal infection rate was 1.5%. This clinical study compared three potent and well-tolerated cART regimens and demonstrated that a higher proportion of participants on raltegravir achieved an undetectable HIV VL near delivery (P = 0.011) compared to the other arms. These findings suggest that raltegravir-containing regimens are optimal regimens for women with HIV initiating treatment late in pregnancy.

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Chikungunya virus can be transmitted perinatally leading to serious neurological sequelae. We report the longitudinal evolution of the brain magnetic resonance imaging aspects of three cases of mother-to-child Chikungunya virus transmission. The first magnetic resonance imaging scan presented brain cavitations, with or without corpus callosum diffusion restriction. Follow-up scans showed reduction in the volume of cavitations, with resolution of the restricted diffusion. However, one patient presented with a normal brain magnetic resonance image, despite the delay in neurocognitive development.

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INTRODUCTION AND OBJECTIVES: Universal vaccination at birth and in infancy is key to the elimination of chronic hepatitis B infection. We aimed to assess hepatitis B immune-prophylaxis and perinatal transmission knowledge, in a large and ethnically diverse cohort of previously pregnant North American women, chronically infected with hepatitis B. MATERIALS AND METHODS: The Hepatitis B Research Network (HBRN) is comprised of 28 Clinical Centers in the United States and Canada. Female cohort participants were administered a questionnaire to assess: (1) their assertion of knowledge regarding HBV prophylaxis at birth, testing, and diagnosis of hepatitis B in their children, and (2) the percentage of affirmative to negative responses for each of the HBV-related interventions her child may have received. The relationship between asserted knowledge, actions taken and maternal demographics were assessed. RESULTS: A total of 351 mothers with 627 children born in or after 1992 were included. Median age at enrollment was 39.8 years. Mothers were mostly foreign-born with the largest percentage from Asia (73.4%) and Africa (11.7%). Of the 627 children, 94.5% had mothers who asserted that they knew whether their child had received HBIG or HBV vaccine at birth, for 88.8% of the children, their mothers indicated that they knew if their child was tested for HBV and for 84.5% of children, their mothers knew if the child was diagnosed with HBV infection. Among children whose mothers asserted knowledge of their HBV management, 95.3% were reported to have received HBIG or HBV vaccine, 83.4% of children were said to have been tested for HBV, and 4.8% of children were said to have been diagnosed with HBV. Younger maternal age was the only factor significantly associated with higher percentage of children for whom mothers reported knowledge of testing (p=0.02) or diagnosis of HBV (p=0.02). CONCLUSIONS: While high percentages of North American children had mothers asserting knowledge of HBV prophylaxis and testing, knowledge gaps remain, with mothers of 5.5-15.5% of children lacking knowledge of key components of the HBV prevention and diagnosis in the perinatal setting. Targeted education of HBsAg-positive mothers may aid in closing this gap and reducing vertical transmission.

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Abstract HIV-1 mother-to-child transmission (HIV-1 MTCT), is an important cause of children mortality worldwide. Brazil has been traditionally praised by its HIV/Aids program, which provides free-of-charge care for people living with HIV-1. Using public epidemiology and demographic databases, we aimed at modeling HIV-1 MTCT prevalence in Brazil through the years (1994-2016) and elaborate a statistical model for forecasting, contributing to HIV-1 epidemiologic surveillance and healthcare decision-making. We downloaded sets of live births and mothers' data alongside HIV-1 cases notification in children one year old or less. Through time series modeling, we estimated prevalence along the years in Brazil, and observed a remarkable decrease of HIV-1 MTCT between 1994 (10 cases per 100,000 live births) and 2016 (five cases per 100,000 live births), a reduction of 50%. Using our model, we elaborated a prognosis for each Brazilian state to help HIV-1 surveillance decision making, indicating which states are in theory in risk of experiencing a rise in HIV-1 MTCT prevalence. Ten states had good (37%), nine had mild (33%), and eight had poor prognostics (30%). Stratifying the prognostics by Brazilian region, we observed that the Northeast region had more states with poor prognosis, followed by North and Midwest, Southeast and South with one state of poor prognosis each. Brazil undoubtedly advanced in the fight against HIV-1 MTCT in the past two decades. We hope our model will help indicating where HIV-1 MTCT prevalence may rise in the future and support government decision makers regarding HIV-1 surveillance and prevention.

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HIV-1 mother-to-child transmission (HIV-1 MTCT), is an important cause of children mortality worldwide. Brazil has been traditionally praised by its HIV/Aids program, which provides free-of-charge care for people living with HIV-1. Using public epidemiology and demographic databases, we aimed at modeling HIV-1 MTCT prevalence in Brazil through the years (1994-2016) and elaborate a statistical model for forecasting, contributing to HIV-1 epidemiologic surveillance and healthcare decision-making. We downloaded sets of live births and mothers' data alongside HIV-1 cases notification in children one year old or less. Through time series modeling, we estimated prevalence along the years in Brazil, and observed a remarkable decrease of HIV-1 MTCT between 1994 (10 cases per 100,000 live births) and 2016 (five cases per 100,000 live births), a reduction of 50%. Using our model, we elaborated a prognosis for each Brazilian state to help HIV-1 surveillance decision making, indicating which states are in theory in risk of experiencing a rise in HIV-1 MTCT prevalence. Ten states had good (37%), nine had mild (33%), and eight had poor prognostics (30%). Stratifying the prognostics by Brazilian region, we observed that the Northeast region had more states with poor prognosis, followed by North and Midwest, Southeast and South with one state of poor prognosis each. Brazil undoubtedly advanced in the fight against HIV-1 MTCT in the past two decades. We hope our model will help indicating where HIV-1 MTCT prevalence may rise in the future and support government decision makers regarding HIV-1 surveillance and prevention.

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La infección por el virus de la inmunodeficiencia humana (VIH) puede adquirirse por transmisión perinatal, y el riesgo de adquirirla ha aumentado porque en los últimos años la epidemia ha tomado un patrón heterosexual, lo que aumenta el número de mujeres infectadas, un riesgo potencial para la transmisión perinatal. Objetivo: Determinar los factores de riesgo asociados a la transmisión vertical en recién nacidos hijos de madres con VIH atendidas en el Centro de Atención a Pacientes con Infecciones de Transmisión Sexual y SIDA (CAPACITS) de Veracruz. Material y métodos: Se realizó un estudio de cohorte retrospectivo de una población de madres VIH+ e hijos que acudieron al CAPACITS de Veracruz en el periodo comprendido entre 2007-2012. Se revisaron los expedientes de mujeres embarazadas y sus recién nacidos atendidos en el CAPACITS, y los resultados se analizaron con estadística descriptiva y mediante la prueba de χ² y regresión logística. Resultados: Se estudiaron 50 mujeres que solicitaron control prenatal. Las variables estudiadas fueron factores asociados en la madre y factores relacionados con el recién nacido. En relación al tratamiento antirretroviral en la muestra, nueve embarazadas (18%) no tomaron ningún tratamiento; dos de sus hijos se infectaron. De los casos de madres con tratamiento, ninguno de sus hijos se infectó. Considerando las variables relacionadas con infección en el producto, una madre sin esquema de tratamiento fue el factor principal para el contagio del niño, en segundo lugar fue el conteo de CD4 < 200 células/mm³ y en tercer lugar la carga viral materna. Conclusión: El resultado de nuestro estudio predice que la positividad de los recién nacidos depende del tratamiento antirretroviral de la madre.

HIV infection can be acquired through perinatal transmission. The risk of acquiring this infection has been increased in recent years because the epidemic has taken a heterosexual pattern, which has caused a growth in the number of infected women and a potential risk for perinatal transmission. Objective: To determine the risk factors associated with vertical transmission in newborns to HIV-positive mothers at the Care Center for Patients with Sexually Transmitted Infections and AIDS (CAPACITS) in Veracruz, Mexico. Material and methods: We conducted a retrospective cohort study of a population of HIV-positive mothers and their newborns, who sought care at the CAPACITS of Veracruz between 2007 and 2012. The records of controlled mothers and their children were analyzed using descriptive and inferential statistics. Results: The study was performed in 50 women. The variables studied were: associated factors in mothers and associated factors in newborns. Concerning the antiretroviral treatment in the sample of mothers, nine (18%) did not take any treatment; two of their children became infected. In the case of treated mothers, none of their children became infected. Considering the infection-related variables in the product, the main factor for the spread of the infection to the children was a mother without treatment schedule and, in second place, a CD4 count < 200 cells/mm³. Conclusions: The results of our study predict that the positivity of the newborn depends on the maternal antiretroviral treatment.

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Se conoce que la transmisión perinatal del VIH es prevenible con la toma de algunas medidas generales y otras específicas. La acción fundamental para lograr esta prevención es identificar temprano durante el embarazo, cuáles mujeres embarazadas están infectadas por VIH. Para conseguir este objetivo es necesario realizar la prueba del ELISA para VIH, a toda embarazada, en su primera consulta prenatal. Las guías para la prevención de la transmisión perinatal de VIH se desarrollaron con el fin de facilitar la aplicación de todas las acciones necesarias para prevenir la transmisión perinatal de VIH en Costa Rica, brindando una óptima atención médica a la madre y al recién nacido. Los elementos fundamentales de estas guías incluyen: tratamiento con 3 antirretrovirales a las mujeres embarazadas VIH+, a apartir de la 12ava semana de gestación, uso intravenoso de Zidovudina en labor, vía de parto por cesárea, suspensión de la lactancia materna, profilaxis con Zidovudina al recién nacido a partir de las 8 horas de edad. Las guías proveen también recomendaciones para proceder en situaciones especiales relacionadas con la embarazada VIH+ y su hijo...

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We report a laboratory confirmed case of vertical transmission of dengue in a mother-child pair in the eastern part of Puerto Rico. The clinical course of the pregnant female suggested a GBS infection, but laboratory tests confirmed it was dengue infection, one week after delivery. The male infant was healthy at birth, but one week after birth developed clinical complications related to vertical transmission of dengue. This report targets physicians in dengue endemic countries like Puerto Rico to be aware of the possibility of vertical transmission of dengue in symptomatic pregnant patients, especially around the time of delivery.

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El Virus de inmunodeficiencia humana (VIH), es un retrovirus que afecta la inmunidad celular mediante la unión selectiva a células que expresan la molécula CD4 en su superficie, en especial los linfocitos T. Descubierto en la década de los 80, ha cobrado la vida de 20 millones de personas hasta la actualidad, con un remanente de 37.8 millones que aún quedan como portadores. De esta última cifra, más de un 50 son niños infectados perinatalmente, con una tasa de 1.500 por día a nivel mundial23. Se han realizado varios trabajos en la última década (PACTG 076, PACTG 316, entre otros), para comprobar la eficacia de la zidovudina, sola y asociada a otros inhibidores de la transcriptasa. La falta de recursos en países como el nuestro imposibilita la implementación adecuada del esquema profiláctico de transmisión perinatal utilizado en países del primer mundo, por lo que debemos utilizar otras combinaciones terapéuticas aún en estudio. Para documentar la eficacia del esquema más utilizado en nuestro medio: biterapia estándar de lamivudina (3TC) y zidovudina (AZT), más la adición de una monodosis de nevirapina justo antes del parto, se realizó un estudio de cohorte, observacional, retrospectivo y comparativo en el hospital maternidad “Mariana de Jesús”, de la ciudad de Guayaquil, debido a su alta incidencia de casos11. El estudio abarcó madres VIH positivo con embarazos interrumpidos por cesárea durante el año 2004, así como también datos de sus neonatos. A fin de sustentar la eficacia de la terapia, se tomaron en consideración los valores de carga viral, obtenidos por PCR y contaje celular CD4, ambos realizados en los laboratorios del Instituto Nacional de Higiene “Leopoldo Izquieta Pérez”, de Guayaquil. Así como también, datos de laboratorio relevantes a los efectos secundarios que pudieran haber sido ocasionados por esta asociación terapéutica, en especial valores de hemoglobina para el seguimiento del efecto secundario más común de esta terapia que es la anemia.

Human immunodeficiency virus (VIH), is a retrovirus affecting cellular immunity through selective union to cells with CD4 molecule expression in their surfaces, especially T-lymphocytes. Discovered in the 80’s, it has killed 20 million up to now, with a remnant of 37.8 million carriers. From the last figure, more than 50 are children infected in perinatal stage, with a world rate of 1,500 per day23. In the last decade several papers have been made (PACTG 076, PACTG 316, among others), to check the effectiveness of zidovuline, alone, and associated to other transcriptase inhibitors. Lack of resources in countries like ours makes impossible to carry out appropriately the preventive system of perinatal transmission used in the first world countries; therefore we have to use other therapy combinations which are still object of studies. To document the effectiveness of the most used system in our country: standard lamivudine (3TC) and zidovuline (AZT) bitherapy, plus a dose of neviparine just before labor, a cohort, observational, retrospective and comparative study was carried out in the maternity hospital “Mariana de Jesús” in Guayaquil because of it’s high case incidence11. The study included positive HIV mothers with interrupted pregnancies by cesarian section during 2004, as well as their newborn data. In order to uphold the effectiveness of the therapy, viral load values, obtained by PCR and cell count CD4 (both made in the Instituto Nacionalde Higiene “Leopoldo Izquieta Pérez” laboratories), were considered. Laboratory data related to side effects that could be produced by this combined therapy were also considered, especially hemoglobin values to make the follow up of the most common side effect: anemia.

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