Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0728731 (prematurity)
 7,134 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Vertical transmission of hepatitis C virus (HCV) was studied in 58 infants of 55 mothers (3 sets of twins). HCV RNA analyses by the polymerase chain reaction (PCR) and alanine aminotransferase (ALT) were performed on consecutive blood samples from birth to 18 months of age (0, 3, 9 and 18 months). Data on factors possibly influencing mother-to-infant transmission of HCV, such as concomitant human immunodeficiency virus (HIV) and hepatitis B virus infection during pregnancy, maternal HCV RNA status at delivery, mode of delivery, prematurity and breastfeeding habits were collected. In addition, 6 older siblings (age 4-10 years) of the infants were tested once for anti-HCV. Of the 55 mothers 52 (95%) had a history of intravenous drug use (IVDU). Two mothers were HIV positive. 40/54 (75%) tested mothers were HCV RNA positive. 16 (27%) infants were delivered by Caesarean section, and 50 (86%) infants were breastfed. All infants were HCV RNA negative on all occasions and anti-HCV negative at the age of 18 months. Maternally acquired anti-HCV antibodies disappeared and were not detected by 9 months in 78%. One of the 6 older siblings was anti-HCV and HCV RNA positive. We conclude that the risk of vertical HCV transmission is low in infants of HCV-positive/HIV-negative mothers, and that breastfeeding seems to be safe in this group.
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PMID:Vertical transmission of hepatitis C virus infection. 889 97

Research related to maternal-child transmission of human immunodeficiency virus (HIV) has been advanced by standardization of case definitions and transmission rate calculation methodologies as well as enhanced diagnostic options for detecting infant HIV-1 infection. Standardization guidelines have yielded vertical transmission rate estimates of 25-30% in developing countries and 14-25% in developed countries. Mathematical modeling suggests that 95% of infant infections occur later than the last 2 months before delivery. Serial polymerase chain reaction evaluation has identified a 7.7% risk of in utero transmission, a 17.6% risk of combined in utero and intrapartum transmission, and a 4.9% incidence of late postnatal transmission. The risk of transmission through breast feeding has been estimated at 14%, with increases with longer durations. Advanced maternal clinical HIV status, primary infection, decreased maternal cell-mediated immunity, placentitis, ascending genital infection during the peripartum period, and syncytium-inducing HIV-1 strains have been associated with higher rates of maternal-child transmission. Prematurity, lack of cellular immunity, and vitamin A deficiency may be infant risk factors. The finding in an AIDS Clinical Trial Group that zidovudine (AZT) treatment was associated with a 67.5% reduction in risk has prompted widespread use of this regimen in developed countries; however, AZT is expensive and logistically difficult to administer in most developing country contexts. Randomized clinical trials currently underway are assessing the benefits of cesarean section delivery, postpartum HIV-specific immunoglobulin administration to infants, avoidance of breast feeding or early weaning, and antenatal maternal vitamin A administration. Selected intervention strategies should be regionally designed to take into account variations in viral, host, and obstetric factors.
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PMID:Mother-to-child transmission of human immunodeficiency virus type 1. 902 9

To determine whether the US Centers for Disease Control guideline of 1 injection of 2.4 million U of benzathine penicillin G is sufficient treatment for early syphilis in pregnant women, this regimen was tested in 180 human immunodeficiency virus-negative urban Black women with syphilis presenting to Kalafong Hospital in Pretoria, South Africa, during 1988-90. A favorable pregnancy outcome was recorded in 108 women who received 2 or 3 weekly intragluteal injections. On the other hand, 1 injection was associated with lower birth weight, increased prematurity and total preterm birth rate, and increased total pregnancy loss and neonatal mortality. These outcomes were reanalyzed after exclusion of women treated with oral penicillin derivatives and adjusted for the estimated duration of treponemicidal levels at 3 weeks post-injection. Birth weight was significantly lower for treponemicidal coverage of 3 weeks or less compared to coverage lasting more than 3 weeks (2748 and 3130 grams, respectively). Also increased when coverage was less than 3 weeks were the relative risks for prematurity (8.5), perinatal mortality (20.5), and congenital syphilis (2.0). Impaired outcome associated with short treatment was clustered in women who attended prenatal care before the 28th week of gestation and those whose initial rapid plasma reagin titer exceeded 16. These findings indicate that the standard protocol is not adequate in areas where syphilis is endemic. Recommended is administration of 2 injections of 2.4 million U benzathine penicillin at least 1 week apart, preferably 4 weeks or more before delivery.
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PMID:Apparent failure of one injection of benzathine penicillin G for syphilis during pregnancy in human immunodeficiency virus-seronegative African women. 911 55

Children of substance abuse mothers have an increased risk of severe pathological disorders such as perinatal diseases (prematurity, intrauterine growth retardation, infections) with their neurological and respiratory complications and sequelae, and transmission of drug addiction related infections, ie human immunodeficiency virus, hepatitis B and C virus, syphilis. Many of these children present a drug withdrawal syndrome characterized by restlessness and jetteriness during the neonatal period. This is frequently followed by a post withdrawal period of several weeks duration with crying, excitement, sleep and feeding difficulties. Although these drug withdrawal manifestations have no incidence on the vital prognosis, it severely impairs the mother-infant interaction. Despite these disorders it appears that the outcome of these children is mainly related to their familial environment which is exposed to many risk factors: mother-child separation, violence, delinquency, precariousness, unhealthy housing, prostitution, drug dependency, parental death or imprisonment... Early medico-psycho-social intervention starting during pregnancy and a prolonged support for several years are the only way to improve their spontaneously poor outcome.
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PMID:[Management of drug addict pregnant women and their children]. 918 Oct 22

Tuberculosis has re-emerged as a serious health problem throughout the world. In the United States, the human immunodeficiency virus epidemic, increased numbers of foreigners from areas where tuberculosis is endemic, and lack of an adequate infrastructure to deal with the large increase of new cases have led to tuberculosis being a serious problem. Because of the long treatment time required, there is a significant risk of developing drug resistance in partially treated patients. Directly observed therapy is a cornerstone of treatment in both pregnant and nonpregnant patients. We need to think about those at risk for tuberculosis in pregnancy and screen the high-risk population. With the advent of satisfactory drugs to treat tuberculosis, the effects on pregnancy are not as serious as before. However, particularly in low socioeconomic populations, tuberculosis probably increases the prematurity and abortion rate.
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PMID:Tuberculosis in pregnancy. 929 22

Neonatal renal candidiasis is a rare complication but serious, associated with prematurity, immunodeficiency, parenteral nutrition and other risk factors, with a mortality rate until 50%. We describe a neonate premature of 28 weeks who developed septicaemia by Candida, complicated with bilateral ureterohydronephrosis and intrapelvic fungus ball. The patient was managed by bilateral nephrostomy drainage and amphotericin B local irrigation, anyway with systemic amphotericin B together with oral fluconazol, needing subsequently bilateral open surgery and external drainage. The infection was eradicated, reaching the patient a gradual healing.
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PMID:[Management of obstructive renal candidiasis. Report of a clinical case]. 932 99

To estimate the risk of mother-to-child transmission of hepatitis C virus (HCV) and identify correlates of transmission, 245 perinatally exposed singleton children followed prospectively beyond 18 months of age were studied. Overall, 28 (11.4%) of the 245 children acquired HCV infection. Transmission occurred in 3 of 80 children (3.7%) whose mothers had HCV infection alone and in 25 of 165 (15.1%; P < .01) whose mothers had concurrent infection with human immunodeficiency virus type 1 (HIV-1). The percentage of HIV-1-infected children was similar (22 of 165, 13.3%), but each virus was transmitted independently; only six infants (3.6%) were coinfected with HCV and HIV-1. The risk of HCV transmission was not associated with maternal HIV-1-related symptoms, intravenous drug use, prematurity, low birth weight, or breast-feeding, whereas it was lower with cesarean section than with vaginal delivery (5.6% vs. 13.9%, P = .06). This suggests that transmission occurs mainly around the time of delivery.
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PMID:Increased risk of maternal-infant hepatitis C virus transmission for women coinfected with human immunodeficiency virus type 1. Italian Study Group for HCV Infection in Children. 940 69

To determine the rate and risk factors for human immunodeficiency virus (HIV)-1 subtype E perinatal transmission, with focus on virus load, pregnant HIV-infected women and their formula-fed infants were followed prospectively in Bangkok. Of 281 infants with known outcome, 68 were infected (transmission rate, 24.2%; 95% confidence interval, 19.3%-29.6%). Transmitting mothers had a 4.3-fold higher median plasma HIV RNA level at delivery than did nontransmitters (P<.001). No transmission occurred at <2000 copies/mL. On multivariate analysis, prematurity (adjusted odds ratio [AOR], 4.5), vaginal delivery (AOR, 2.9), low NK cell percentage (AOR, 2.4), and maternal virus load were associated with transmission. As RNA quintiles increased, the AOR for transmission increased linearly from 4.5 to 24.8. Two-thirds of transmission was attributed to virus load>10,000 copies/mL. Although risk is multifactorial, high maternal virus load at delivery strongly predicts transmission. This may have important implications for interventions designed to reduce perinatal transmission.
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PMID:Maternal virus load and perinatal human immunodeficiency virus type 1 subtype E transmission, Thailand. Bangkok Collaborative Perinatal HIV Transmission Study Group. 995 65

The problems of immunologic adaptation during the transitional period from intra- to extrauterine life are responsible for the physiologic immaturity of the immune function in newborn infants. In preterm neonates the immunodeficiency is more severe and prolonged and is associated with a higher incidence of infections and sepsis. Furthermore, due to immaturity of the hematologic system, anemia, thrombocytopenia, and neutropenia are frequently observed in very low birth weight infants. The dysregulation of cytokine and hematopoietic growth factor synthesis is an important contributory factor to the complex deficiency of immunologic and hematologic function in the neonate and may explain the reduced incidence of acute graft-versus-host disease observed after cord blood transplantation in children. Human milk is a rich source of most of the cytokines that are reduced in the neonate. Granulocyte colony-stimulating factor, granulocyte-macrophage colony-stimulating factor, and erythropoietin are currently under evaluation in newborn infants with septic neutropenia or anemia of prematurity.
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PMID:Hematopoietic growth factor levels in term and preterm infants. 1022 41

Pulmonary surfactant is a complex and highly surface active material composed of lipids and proteins which is found in the fluid lining the alveolar surface of the lungs. Surfactant prevents alveolar collapse at low lung volume, and preserves bronchiolar patency during normal and forced respiration (biophysical functions). In addition, it is involved in the protection of the lungs from injuries and infections caused by inhaled particles and micro-organisms (immunological, non-biophysical functions). Pulmonary surfactant can only be harvested by lavage procedures, which may disrupt its pre-existing biophysical and biochemical micro-organization. These limitations must always be considered when interpreting ex vivo studies of pulmonary surfactant. A pathophysiological role for surfactant was first appreciated in premature infants with respiratory distress syndrome and hyaline membrane disease, a condition which is nowadays routinely treated with exogenous surfactant replacement. Biochemical surfactant abnormalities of varying degrees have been described in obstructive lung diseases (asthma, bronchiolitis, chronic obstructive pulmonary disease, and following lung transplantation), infectious and suppurative lung diseases (cystic fibrosis, pneumonia, and human immunodeficiency virus), adult respiratory distress syndrome, pulmonary oedema, other diseases specific to infants (chronic lung disease of prematurity, and surfactant protein-B deficiency), interstitial lung diseases (sarcoidosis, idiopathic pulmonary fibrosis, and hypersensitivity pneumonitis), pulmonary alveolar proteinosis, following cardiopulmonary bypass, and in smokers. For some pulmonary conditions surfactant replacement therapy is on the horizon, but for the majority much more needs to be learnt about the pathophysiological role the observed surfactant abnormalities may have.
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PMID:Pulmonary surfactant in health and human lung diseases: state of the art. 1044 27


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