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1.
Kathmandu Univ Med J (KUMJ) ; 8(29): 62-72, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-21209510

RESUMEN

BACKGROUND: Perinatal (stillbirths and first week neonatal deaths) and neonatal (deaths in the first 4 weeks) mortality rates remain high in developing countries like Nepal. As most births and deaths occur in the community, an option to ascertain causes of death is to conduct verbal autopsy. OBJECTIVE: The objective of this study was to classify and review the causes of stillbirths and neonatal deaths in Dhanusha district, Nepal. MATERIALS AND METHODS: Births and neonatal deaths were identified prospectively in 60 village development committees of Dhanusha district. Families were interviewed at six weeks after delivery, using a structured questionnaire. Cause of death was assigned independently by two pediatricians according to a predefined algorithm; disagreement was resolved in discussion with a consultant neonatologist. RESULTS: There were 25,982 deliveries in the 2 years from September 2006 to August 2008. Verbal autopsies were available for 601/813 stillbirths and 671/954 neonatal deaths. The perinatal mortality rate was 60 per 1000 births and the neonatal mortality rate 38 per 1000 live births. 84% of stillbirths were fresh and obstetric complications were the leading cause (67%). The three leading causes of neonatal death were birth asphyxia (37%), severe infection (30%) and prematurity or low birth weight (15%). Most infants were delivered at home (65%), 28% by relatives. Half of women received an injection (presumably an oxytocic) during home delivery to augment labour. Description of symptoms commensurate with birth asphyxia was commoner in the group of infants who died (41%) than in the surviving group (14%). CONCLUSION: The current high rates of stillbirth and neonatal death in Dhanusha suggest that the quality of care provided during pregnancy and delivery remains sub-optimal. The high rates of stillbirth and asphyxial mortality imply that, while efforts to improve hygiene need to continue, intrapartum care is a priority. A second area for consideration is the need to reduce the uncontrolled use of oxytocic for augmentation of labour.


Asunto(s)
Causas de Muerte , Mortalidad Perinatal , Mortinato/epidemiología , Lactancia Materna , Femenino , Humanos , Alimentos Infantiles , Recién Nacido , Masculino , Nepal/epidemiología , Embarazo , Estudios Prospectivos
2.
Artículo en Inglés | MEDLINE | ID: mdl-19791705

RESUMEN

OBJECTIVE: Nepal's Safe Delivery Incentive Programme (SDIP) was introduced nationwide in 2005 with the aim of encouraging greater use of professional care at childbirth. It provided cash to women giving birth in a public health facility and an incentive to the health provider for each delivery attended, either at home or in the facility. We aimed to assess the impact of the programme on neonatal mortality and health care seeking behaviour at childbirth in one district of Nepal. METHODS: Impacts were identified using an interrupted time series approach, applied to houSehold data. We estimated a model linking the level of each outcome at a point in time to the start of the programme, demographic controls, a vector of time variables and community-level fixed effects. FINDINGS: The recipients of the cash transfer in the programme's first two years were disproportionately wealthier households, reflecting existing inequality in the use of government maternity services. In places with women's groups--where information about the policy was widely disseminated--the SDIP substantially increased skilled birth attendance, but failed to impact on either neonatal mortality or the caesarean section rate. In places with no women's groups, the SDIP had no impact on utilisation outcomes or neonatal mortality. IMPLICATIONS FOR POLICY: The lack of any impact on neonatal mortality suggests that greater increases in utilisation or better quality of care are needed to improve health outcomes. The SDIP changed health care seeking behaviour only in those areas with women's groups highlighting the importance of effective communication of the policy to the wider public.


Asunto(s)
Parto Obstétrico/estadística & datos numéricos , Atención Primaria de Salud/economía , Parto Obstétrico/economía , Parto Obstétrico/normas , Países en Desarrollo , Femenino , Humanos , Seguro de Salud , Motivación , Nepal , Embarazo
3.
Thorax ; 63(2): 154-9, 2008 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-17693588

RESUMEN

BACKGROUND: Pneumocystis pneumonia (PCP) is conventionally diagnosed by identifying Pneumocystis jirovecii in lower respiratory tract samples using cytochemical stains. Molecular diagnosis of PCP is potentially more sensitive. METHODS: A study was undertaken to use an extensively optimised real-time polymerase chain reaction (PCR) using primers designed to hybridise with the P. jirovecii heat shock protein 70 (HSP70) gene to quantify P. jirovecii DNA in bronchoalveolar lavage (BAL) fluid from HIV-infected patients with and without PCP, and to compare this assay with conventional PCR targeting the P. jirovecii mitochondrial large subunit rRNA gene sequence (mt LSU rRNA). RESULTS: Sixty-one patients had 62 episodes of PCP (defined by detection of P. jirovecii in BAL fluid by cytochemical stains and typical clinical presentation). Quantifiable HSP70 DNA was detected in 61/62 (range approximately 13-18,608 copies/reaction; median approximately 332) and was detectable but below the limit of quantification (approximately 5 copies/reaction) in 1/62. Seventy-one other patients had 74 episodes with alternative diagnoses. Quantifiable HSP70 DNA was detectable in 6/74 (8%) episodes (range approximately 6-590 copies/reaction; median approximately 14) and detectable but below the limit of quantification in 34/74 (46%). Receiver-operator curve analysis (cut-off >10 copies/reaction) showed a clinical sensitivity of 98% (95% 91% to 100%) and specificity of 96% (95% CI 87% to 99%) for diagnosis of PCP. By contrast, clinical sensitivity of mt LSU rRNA PCR was 97% (95% CI 89% to 99%) and specificity was 68% (95% CI 56% to 78%). CONCLUSION: The HSP70 real-time PCR assay detects P. jirovecii DNA in BAL fluid and may have a diagnostic application. Quantification of P. jirovecii DNA by real-time PCR may also discriminate between colonisation with P. jirovecii and infection.


Asunto(s)
Infecciones Oportunistas Relacionadas con el SIDA/diagnóstico , Pneumocystis carinii/aislamiento & purificación , Neumonía por Pneumocystis/diagnóstico , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa/normas , Adulto , Líquido del Lavado Bronquioalveolar/química , Broncoscopía , ADN de Hongos/análisis , Femenino , Humanos , Masculino , Pneumocystis carinii/genética , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa/métodos , Sensibilidad y Especificidad
4.
Indian Pediatr ; 42(7): 697-702, 2005 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-16085972

RESUMEN

The study aimed to determine the number of children and young people reported as having a disability by family members, and to classify impairments leading to disability. A Cross-sectional census was conducted of all households in 24 rural geopolitical units of Makwanpur district, Nepal. Heads of household were asked about family members under the age of 20 with disability. Such members were resident in 733 of 28,376 households, a household prevalence of 2.58%. 829 people under the age of 20 were reported as having a disability, a population prevalence of 0.95%. The commonest functional impairments reported were motor and the commonest anatomical impairments involved the limbs. More males with disability were identified than females.


Asunto(s)
Personas con Discapacidad/estadística & datos numéricos , Salud Rural/estadística & datos numéricos , Adolescente , Adulto , Niño , Personas con Discapacidad/clasificación , Femenino , Humanos , Masculino , Nepal/epidemiología , Prevalencia
5.
Ann Trop Paediatr ; 24(3): 245-51, 2004 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-15479575

RESUMEN

Although skin-to-skin contact (or kangaroo mother care, KMC) for preterm infants is a practical alternative to incubator care, no studies have compared these methods using continuous ambulatory temperature monitoring. To compare thermal regulation in low birthweight infants (< 2000 g) managed by KMC alternating with conventional care (CC) and to determine the acceptability to mothers of KMC, an experimental study with a crossover design with observational and qualitative data collected on temperature patterns and mothers attitudes to skin-to-skin care was conducted in the neonatal wards of three hospitals in Lagos, Nigeria. Thirteen eligible infants were nursed by their mothers or surrogates in 38 4-hour sessions of KMC and the results compared with 38 sessions of incubator care. The risk of hypothermia was reduced by > 90% when nursed by KMC rather than conventional care, relative risk (RR) 0.09 (0.03-0.25). More cases of hyperthermia (> 37.5 degrees C) occurred with KMC, and coreperiphery temperature differences were widened, but the risk of hyperthermia > 37.9 degrees C (RR 1.3, 0.9-1.7) was not significant. Micro-ambient temperatures were higher during KMC, although the average room temperatures during both procedures did not differ significantly. Mothers felt that KMC was safe, and preferred the method to CC because it did not separate them from their infants, although some had problems adjusting to this method of care. Where equipment for thermal regulation is lacking or unreliable, KMC is a preferable method for managing stable low birthweight infants.


Asunto(s)
Regulación de la Temperatura Corporal/fisiología , Incubadoras , Cuidado del Lactante/métodos , Recién Nacido de Bajo Peso/fisiología , Relaciones Madre-Hijo , Adulto , Actitud Frente a la Salud , Temperatura Corporal/fisiología , Estudios Cruzados , Países en Desarrollo , Femenino , Humanos , Hipotermia/prevención & control , Recién Nacido , Recien Nacido Prematuro/fisiología , Madres/psicología , Nigeria , Temperatura Cutánea/fisiología , Tacto
6.
Acta Paediatr ; 90(3): 316-22, 2001 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-11332174

RESUMEN

UNLABELLED: We describe a clinical grading system for the assessment of neonatal encephalopathy developed for a large prospective study in Kathmandu. Inter-observer variability testing of our system on 27 infants showed high agreement (kappa value 0.87). Validity for the prediction of major neurodevelopmental impairment at 1 y of age was tested using a cohort of 57 survivors of encephalopathy, all of whom were assessed using a combination of the Denver Developmental Screening Test and Bailey 2 at 1 y. We compared this with a modification of a scoring system previously validated in Cape Town. Both schemes converted a pretest probability of 31% (the prevalence of major impairment at 1 y of age in this cohort) to a post-test probability of 55%. This showed only marginal improvement over the traditional risk marker of neurological abnormality at discharge (post-test probability 51%). At 6 wk of age acquired microcephaly increased the probability of major impairment to 79%. CONCLUSIONS: It seems to make little difference both in practical or predictive terms whether one describes the neurological condition of the neonate using a descriptive or scoring system. The important thing is to perform repeated systematic neurological examinations on a daily basis during the neonatal period. Many clinicians will justifiably continue to use the discharge examination as the deciding factor for the need for continued neurodevelopmental surveillance.


Asunto(s)
Encefalopatías/fisiopatología , Discapacidades del Desarrollo/epidemiología , Antropometría , Países en Desarrollo , Discapacidades del Desarrollo/etiología , Femenino , Humanos , Lactante , Recién Nacido , Masculino , Nepal/epidemiología , Examen Neurológico , Variaciones Dependientes del Observador , Probabilidad , Pronóstico , Reproducibilidad de los Resultados
7.
Appl Environ Microbiol ; 66(12): 5259-66, 2000 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-11097900

RESUMEN

Profiles of dissolved O(2) and methane with increasing depth were generated for Lake Washington sediment, which suggested the zone of methane oxidation is limited to the top 0.8 cm of the sediment. Methane oxidation potentials were measured for 0.5-cm layers down to 1.5 cm and found to be relatively constant at 270 to 350 micromol/liter of sediment/h. Approximately 65% of the methane was oxidized to cell material or metabolites, a signature suggestive of type I methanotrophs. Eleven methanotroph strains were isolated from the lake sediment and analyzed. Five of these strains classed as type I, while six were classed as type II strains by 16S rRNA gene sequence analysis. Southern hybridization analysis with oligonucleotide probes detected, on average, one to two copies of pmoA and one to three copies of 16S rRNA genes. Only one restriction length polymorphism pattern was shown for pmoA genes in each isolate, and in cases where, sequencing was done, the pmoA copies were found to be almost identical. PCR primers were developed for mmoX which amplified 1.2-kb regions from all six strains that tested positive for cytoplasmic soluble methane mono-oxygenase (sMMO) activity. Phylogenetic analysis of the translated PCR products with published mmoX sequences showed that MmoX falls into two distinct clusters, one containing the orthologs from type I strains and another containing the orthologs from type II strains. The presence of sMMO-containing Methylomonas strains in a pristine freshwater lake environment suggests that these methanotrophs are more widespread than has been previously thought.


Asunto(s)
Agua Dulce/microbiología , Sedimentos Geológicos/microbiología , Metano/metabolismo , Proteobacteria/aislamiento & purificación , Proteobacteria/metabolismo , Secuencia de Aminoácidos , Secuencia de Bases , Cartilla de ADN/genética , ADN Bacteriano/genética , Cinética , Methylococcaceae/genética , Methylococcaceae/aislamiento & purificación , Methylococcaceae/metabolismo , Methylomonas/genética , Methylomonas/aislamiento & purificación , Methylomonas/metabolismo , Methylosinus/genética , Methylosinus/aislamiento & purificación , Methylosinus/metabolismo , Datos de Secuencia Molecular , Oxígeno/metabolismo , Oxigenasas/genética , Oxigenasas/metabolismo , Proteobacteria/genética , ARN Bacteriano/genética , ARN Ribosómico 16S/genética , Rhizobiaceae/genética , Rhizobiaceae/aislamiento & purificación , Rhizobiaceae/metabolismo , Homología de Secuencia de Aminoácido , Homología de Secuencia de Ácido Nucleico , Washingtón
8.
Semin Neonatol ; 5(3): 209-19, 2000 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-10956446

RESUMEN

The relationship between maternal nutrition and fetal growth is more complex than might be at first assumed. Low birthweight (LBW) increases the risk of early mortality and later morbidity, and attempts to improve fetal outcome in developing countries need to address the problem of compromised fetal growth. This paper examines the links between birthweight and women's nutritional status in both biomedical and programmatic contexts.


Asunto(s)
Desarrollo Embrionario y Fetal/fisiología , Recién Nacido de Bajo Peso , Trastornos Nutricionales/fisiopatología , Estado Nutricional , Complicaciones del Embarazo , Antropometría , Femenino , Humanos , Recién Nacido , Micronutrientes/administración & dosificación , Fenómenos Fisiológicos de la Nutrición , Embarazo , Factores de Riesgo , Vitaminas/uso terapéutico , Zinc/uso terapéutico
9.
BMJ ; 320(7244): 1229-36, 2000 May 06.
Artículo en Inglés | MEDLINE | ID: mdl-10797030

RESUMEN

OBJECTIVE: To determine the risk factors for neonatal encephalopathy among term infants in a developing country. DESIGN: Unmatched case-control study. SETTING: Principal maternity hospital of Kathmandu, Nepal. SUBJECTS: All 131 infants with neonatal encephalopathy from a population of 21 609 infants born over an 18 month period, and 635 unmatched infants systematically recruited over 12 months. MAIN OUTCOME MEASURES: Adjusted odds ratio estimates for antepartum and intrapartum risk factors. RESULTS: The prevalence of neonatal encephalopathy was 6.1 per 1,000 live births of which 63% were infants with moderate or severe encephalopathy. The risk of death from neonatal encephalopathy was 31%. The risk of neonatal encephalopathy increased with increasing maternal age and decreasing maternal height. Antepartum risk factors included primiparity (odds ratio 2.0) and non-attendance for antenatal care (2.1). Multiple births were at greatly increased risk (22). Intrapartum risk factors included non-cephalic presentation (3.4), prolonged rupture of membranes (3.8), and various other complications. Particulate meconium was strongly associated with encephalopathy (18). Induction of labour with oxytocin was associated with encephalopathy in 12 of 41 deliveries (5.7). Overall, 78 affected infants (60%) compared with 36 controls (6%) either had evidence of intrapartum compromise or were born after an intrapartum difficulty likely to result in fetal compromise. A concentration of maternal haemoglobin of less than 8.0 g/dl in the puerperium was significantly associated with encephalopathy (2.5) as was a maternal thyroid stimulating hormone concentration greater than 5 mIU/l (2.1). CONCLUSIONS: Intrapartum risk factors remain important for neonatal encephalopathy in developing countries. There is some evidence of a protective effect from antenatal care. The use of oxytocin in low income countries where intrapartum monitoring is suboptimal presents a major risk to the fetus. More work is required to explore the association between maternal deficiency states and neonatal encephalopathy.


PIP: This unmatched case-control study determined the risk factors for neonatal encephalopathy among term infants in Kathmandu, Nepal. Study participants included 131 infants with neonatal encephalopathy born between January 1995 and July 1996, and 635 unmatched infants systematically recruited over 12 months. The prevalence of neonatal encephalopathy was 6.1% per 1000 live births, of which 63% were infants with moderate encephalopathy. Antepartum risk factors included multiple births (odds ratio, OR = 22), primiparity (OR = 2.0), and nonattendance for antenatal care (OR = 2.1). Intrapartum risk factors were particulate meconium (OR = 18), noncephalic presentation (OR = 3.4), prolonged rupture of membranes (OR = 3.8), and other complications. In addition, induction of labor with oxytocin was associated with encephalopathy in 12 of 41 deliveries (OR = 5.7). Overall, 78 affected infants (60%) compared with 36 controls (6%) either had evidence of intrapartum compromise or were born after an intrapartum difficulty likely to result in fetal compromise. Moreover, maternal hemoglobin concentration 8.0 g/dl (OR = 2.5) and thyroid stimulating hormone 5 ml U/l (OR = 2.1) were associated with encephalopathy. Intrapartum risk factors remain important for neonatal encephalopathy in developing countries. There is some evidence of a protective effect from antenatal care. The use of oxytocin in low-income countries where intrapartum monitoring is suboptimal presents a major risk to the fetus. Further studies are required to explore the association between maternal deficiency states and neonatal encephalopathy.


Asunto(s)
Daño Encefálico Crónico/etiología , Países en Desarrollo , Trabajo de Parto Inducido/efectos adversos , Complicaciones del Trabajo de Parto , Estatura , Daño Encefálico Crónico/epidemiología , Estudios de Casos y Controles , Femenino , Hemoglobinas/análisis , Humanos , Recién Nacido , Edad Materna , Nepal/epidemiología , Complicaciones del Trabajo de Parto/sangre , Complicaciones del Trabajo de Parto/epidemiología , Oportunidad Relativa , Paridad , Embarazo , Atención Prenatal , Prevalencia , Factores de Riesgo , Tirotropina/sangre , Negativa del Paciente al Tratamiento
10.
Paediatr Perinat Epidemiol ; 14(1): 39-52, 2000 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-10703033

RESUMEN

We describe a prospective cross-sectional survey over a 12-month period in the principal maternity hospital of Kathmandu, Nepal, where over 50% of the local population deliver. The study aim was to estimate the contribution of birth asphyxia to perinatal mortality in this setting. During 1995, there were 14,371 livebirths and 400 stillbirths, a total stillbirth rate of 27 per 1000 total births. The fresh term (2000 g or more) stillbirth rate was 8.5 per 1000 total births [95% CI 7.1, 10.1]. Ninety-two cases of neonatal encephalopathy (NE) affecting term infants were detected (excluding those due to congenital malformations, hypoglycaemia and early neonatal sepsis). The birth prevalence of NE was 6.4 per 1000 livebirths [95% CI 5.2, 7.8]. There was evidence of intrapartum compromise in 63 (68%) of the cases of NE and 65 (76%) of the stillbirths, but only in 12 (12%) of controls. The cause-specific early neonatal mortality rate for NE was 2.1 per 1000 livebirths [95% CI 1.4, 3.0]. Combining the NE deaths and fresh stillbirths gives an upper estimate for term birth asphyxia perinatal mortality rate of 10.8 per 1000 total births [95% CI 9.2, 12.6], 24% of all perinatal deaths before hospital discharge. This study suggests that birth asphyxia remains an important cause of perinatal mortality in developing countries. The paper discusses the pros and cons of different strategies to reduce birth asphyxia in low-income countries.


Asunto(s)
Asfixia Neonatal/epidemiología , Encefalopatías/epidemiología , Muerte Fetal/epidemiología , Mortalidad Infantil , Isquemia Encefálica/epidemiología , Estudios Transversales , Países en Desarrollo , Humanos , Recién Nacido , Nepal/epidemiología , Pobreza , Estudios Prospectivos , Población Urbana
11.
Arch Dis Child Fetal Neonatal Ed ; 82(1): F46-51, 2000 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-10634842

RESUMEN

AIMS: To measure the prevalence of hypoglycaemia among newborn infants in Nepal, where classic risk factors prevail, and to evaluate their importance. METHODS: A cross sectional study was done of 578 term newborn infants aged 0 to 48 hours on the postnatal wards of a government maternity hospital in Kathmandu, with unmatched case-control analysis of risk factors for moderate hypoglycaemia (less than 2.0 mmol /l). RESULTS: Two hundred and thirty eight (41%) newborn infants had mild (less than 2.6 mmol/l) and 66 (11%) moderate hypoglycaemia. Significant independent risk factors for moderate hypoglycaemia included postmaturity (OR 2.62), birthweight under 2.5 kg (OR 2.11), small head size (OR 0.59), infant haemoglobin >210 g/l (OR 2.77), and raised maternal thyroid stimulating hormone (TSH) (OR 3.08). Feeding delay increased the risk of hypoglycaemia at age 12-24 hours (OR 4.09). Disproportionality affected the risk of moderate hypoglycaemia: lower with increasing ponderal index (OR 0.29), higher as the head circumference to birthweight ratio increased (OR 1.41). Regression expressing blood glucose concentration as a continuous variable revealed associations with infant haemoglobin (negative) and maternal haemoglobin (positive), but no other textbook risk factors. CONCLUSIONS: Neonatal hypoglycaemia is more common in a developing country, but may not be a clinical problem unless all fuel availability is reduced. Some textbook risk factors, such as hypothermia, disappear after controlling for confounding variables. Early feeding could reduce moderate hypoglycaemia in the second 12 hours of life. The clinical significance of raised maternal TSH and maternal anaemia as prenatal risk factors requires further research.


Asunto(s)
Hipoglucemia/congénito , Adolescente , Adulto , Anemia/complicaciones , Peso al Nacer , Glucemia/análisis , Estudios de Casos y Controles , Cefalometría , Estudios Transversales , Países en Desarrollo/estadística & datos numéricos , Femenino , Cabeza/anatomía & histología , Hemoglobinas/análisis , Humanos , Hipoglucemia/epidemiología , Fenómenos Fisiológicos Nutricionales del Lactante , Recién Nacido de Bajo Peso , Recién Nacido , Posmaduro , Masculino , Nepal/epidemiología , Oportunidad Relativa , Prevalencia , Análisis de Regresión , Factores de Riesgo , Tirotropina/sangre
12.
Arch Dis Child Fetal Neonatal Ed ; 82(1): F52-8, 2000 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-10634843

RESUMEN

AIMS: To study early neonatal metabolic adaptation in a hospital population of neonates in Nepal. METHODS: A cross sectional study was made of 578 neonates, 0 to 48 hours after birth, in the main maternity hospital in Kathmandu. The following clinical and nutritional variables were assessed: concentrations and age profiles of blood glucose, hydroxybutyrate, lactate, pyruvate, free fatty acids (FFA) and glycerol; associations between alternative fuel levels and hypoglycaemia; and regression of possible risk factors for ketone availability. RESULTS: Risk factors for impaired metabolic adaptation were common, especially low birthweight (32%), feeding delays, and cold stress. Blood glucose and ketones rose with age, but important age effects were also found for risk factors like hypothermia, thyroid hormone activities, and feeding practices. Alternative fuel concentrations, except FFA, were significantly reduced in infants with moderate hypoglycaemia during the first 48 hours after birth. Unlike earlier studies, small for gestational age (SGA) infants had significantly higher hydroxybutyrate:glucose ratios which suggested counter regulatory ketogenesis. Hypoglycaemic infants were not hyperinsulinaemic. Regression analysis showed risk factors for impaired counter regulation which included male and large infants, hypothermia, and poorer infant thyroid function. SGA infants and those whose mothers had received no antenatal care had increased counter regulation. CONCLUSIONS: Alternative fuels are important in the metabolic assessment of neonates, and they might provide effective cerebral metabolism even during moderate hypoglycaemia. Hypoglycaemic infants generally had lower concentrations of alternative fuels through either reduced availability or increased consumption. SGA and post term infants increased counter regulatory ketogenesis with early neonatal hypoglycaemia, but hypothermia, male gender, and low infant T4 were associated with impaired counter regulation after birth.


Asunto(s)
Metabolismo Energético , Hipoglucemia/congénito , Factores de Edad , Glucemia/análisis , Estudios Transversales , Ácidos Grasos no Esterificados/sangre , Femenino , Fiebre/sangre , Fiebre/metabolismo , Glicerol/sangre , Humanos , Hidroxibutiratos/sangre , Hiperinsulinismo/sangre , Hipoglucemia/sangre , Hipoglucemia/metabolismo , Fenómenos Fisiológicos Nutricionales del Lactante , Recién Nacido de Bajo Peso/sangre , Recién Nacido de Bajo Peso/metabolismo , Recién Nacido , Recién Nacido Pequeño para la Edad Gestacional/sangre , Recién Nacido Pequeño para la Edad Gestacional/metabolismo , Cetonas/sangre , Ácido Láctico/sangre , Masculino , Nepal , Ácido Pirúvico/sangre , Análisis de Regresión , Factores de Riesgo , Factores Sexuales , Estrés Fisiológico/sangre , Estrés Fisiológico/metabolismo , Hormonas Tiroideas/sangre , Tiroxina/sangre
13.
Dev Med Child Neurol ; 41(10): 689-95, 1999 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-10587046

RESUMEN

To determine the outcome at 1 year of neonatal encephalopathy (NE) and to estimate the possible contribution of birth asphyxia to childhood disability in a low-income South Asian country, a prospective cohort study was undertaken in the principal maternity hospital of Kathmandu, where over 50% of local women give birth. From a total population cohort of 21609 live births, 131 term infants with NE (after exclusion of cases associated with neonatal sepsis, congenital malformations, or primary hypoglycaemia) and 208 term control infants were recruited. Of these, 102 (78%) infants with NE and 106 (51%) control infants were followed-up to 1 year of age. Outcome measures were death or neurodevelopmental impairment, graded as major, minor or none. Of the 131 term infants with NE, 83 were graded with moderate or severe NE according to conventional definition. By 1 year of age, 45 (44%) of the infants with NE had died, 18 (18%) had severe impairments, and two (2%) had minor impairments; four (4%) of the control subjects had died and two (2%) had minor impairments. Most deaths in subjects with NE occurred in the early neonatal period; NE carried no excess risk of death beyond the neonatal period. Of the 18 children with major impairment, 14 (78%) had spastic tetraplegic cerebral palsy and eight (44%) had multiple impairments. Compared with the control group the relative risk of death by 1 year was 5 (95% CI 1.4 to 15) for mild NE, 8 (95% CI 3 to 23) for moderate, and 26 (95% CI 10 to 67) for severe. Twenty-seven of 38 (71%) infants with moderate NE either died or survived with major impairment. An upper estimate for the prevalence of major neuroimpairment at 1 year attributable to birth asphyxia is 1 per 1000 live births in this population.


Asunto(s)
Asfixia Neonatal/complicaciones , Daño Encefálico Crónico/etiología , Niños con Discapacidad , Hipoxia Encefálica/complicaciones , Evaluación de Resultado en la Atención de Salud , Asfixia Neonatal/fisiopatología , Daño Encefálico Crónico/epidemiología , Desarrollo Infantil , Femenino , Humanos , Hipoxia Encefálica/fisiopatología , Lactante , Recién Nacido , Masculino , Nepal
14.
Appl Environ Microbiol ; 65(11): 5066-74, 1999 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-10543824

RESUMEN

The 16S rRNA and pmoA genes from natural populations of methane-oxidizing bacteria (methanotrophs) were PCR amplified from total community DNA extracted from Lake Washington sediments obtained from the area where peak methane oxidation occurred. Clone libraries were constructed for each of the genes, and approximately 200 clones from each library were analyzed by using restriction fragment length polymorphism (RFLP) and the tetrameric restriction enzymes MspI, HaeIII, and HhaI. The PCR products were grouped based on their RFLP patterns, and representatives of each group were sequenced and analyzed. Studies of the 16S rRNA data obtained indicated that the existing primers did not reveal the total methanotrophic diversity present when these data were compared with pure-culture data obtained from the same environment. New primers specific for methanotrophs belonging to the genera Methylomonas, Methylosinus, and Methylocystis were developed and used to construct more complete clone libraries. Furthermore, a new primer was designed for one of the genes of the particulate methane monooxygenase in methanotrophs, pmoA. Phylogenetic analyses of both the 16S rRNA and pmoA gene sequences indicated that the new primers should detect these genes over the known diversity in methanotrophs. In addition to these findings, 16S rRNA data obtained in this study were combined with previously described phylogenetic data in order to identify operational taxonomic units that can be used to identify methanotrophs at the genus level.


Asunto(s)
Agua Dulce/microbiología , Genes Bacterianos , Sedimentos Geológicos/microbiología , Methylomonas/genética , Methylosinus/genética , Filogenia , Polimorfismo de Longitud del Fragmento de Restricción , Bacterias/clasificación , Bacterias/genética , Biblioteca de Genes , Methylomonas/clasificación , Methylosinus/clasificación , ARN Ribosómico 16S/genética , Mapeo Restrictivo
16.
Appl Environ Microbiol ; 64(8): 2899-905, 1998 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-9750123

RESUMEN

A facultatively methylotrophic bacterium, strain IMB-1, that has been isolated from agricultural soil grows on methyl bromide (MeBr), methyl iodide, methyl chloride, and methylated amines, as well as on glucose, pyruvate, or acetate. Phylogenetic analysis of its 16S rRNA gene sequence indicates that strain IMB-1 classes in the alpha subgroup of the class Proteobacteria and is closely related to members of the genus Rhizobium. The ability of strain IMB-1 to oxidize MeBr to CO2 is constitutive in cells regardless of the growth substrate. Addition of cell suspensions of strain IMB-1 to soils greatly accelerates the oxidation of MeBr, as does pretreatment of soils with low concentrations of methyl iodide. These results suggest that soil treatment strategies can be devised whereby bacteria can effectively consume MeBr during field fumigations, which would diminish or eliminate the outward flux of MeBr to the atmosphere.


Asunto(s)
Fumigación , Bacterias Gramnegativas/aislamiento & purificación , Bacterias Gramnegativas/metabolismo , Hidrocarburos Bromados/metabolismo , Plaguicidas/metabolismo , Microbiología del Suelo , Biodegradación Ambiental , Medios de Cultivo , Bacterias Gramnegativas/clasificación , Bacterias Gramnegativas/crecimiento & desarrollo , Oxidación-Reducción , Filogenia
17.
Anal Chem ; 70(13): 2693-8, 1998 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-9666732

RESUMEN

Polymerase chain reaction (PCR) assays were designed to amplify 56- and 99-base regions of the pmoA gene from Methylosinus trichosporium OB3b and Methylomicrobium albus BG8, two species of methanotrophic bacteria that are of interest for monitoring bioremediation activity. The PCR product sizes are in a mass range that is accessible to analysis by MALDI-TOF mass spectrometry. A rapid purification procedure using commercially available reversed-phase cartridges was applied prior to MALDI-TOF analysis. A small aliquot (1.5%, 1.5 microL) from a single 100-microL PCR reaction was sufficient for reliable detection. No cross-amplification products were observed when primers designed for one bacterial species were used with genomic DNA of the other species. The methodology described here has potential to allow less expensive and faster characterization of the ability of microbial populations to destroy pollutants in groundwater and soil at contaminated industrial sites.


Asunto(s)
Genes Bacterianos , Methylococcaceae/genética , Microbiología del Suelo , Microbiología del Agua , Biodegradación Ambiental , ADN Bacteriano/análisis , Reacción en Cadena de la Polimerasa , Contaminantes del Suelo/análisis , Espectrometría de Masa por Láser de Matriz Asistida de Ionización Desorción/métodos , Contaminantes Químicos del Agua/análisis
18.
Health Policy Plan ; 13(2): 152-8, 1998 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-10180403

RESUMEN

This nested case-control study compares the characteristics of mothers having home or institutional deliveries in Kathmandu, Nepal, and explores the reasons given by mothers for a home delivery. The delivery patterns of mothers were identified in a cross-sectional survey of two communities: an urban area of central Kathmandu (Kalimati) and a peri-urban area (Kirtipur and Panga) five kilometres from the city centre. 357 pregnant women were identified from a survey of 6130 households: 183 from 3663 households in Kirtipur and Panga, 174 from 2467 households in Kalimati. Methods involved a structured baseline household questionnaire and detailed follow-up of identified pregnant women with structured and semi-structured interviews in hospital and the community. The main outcome measures were social and economic household details of pregnant women; pregnancy and obstetric details; place of delivery; delivery attendant; and reasons given for home delivery. The delivery place of 334/357 (94%) of the pregnant women identified at the survey was determined. 272 (81%) had an institutional delivery and 62 (19%) delivered at home. In univariate analysis comparing home and institutional deliverers, maternal education, parity, and poverty indicators (income, size of house, ownership of house) were associated with place of delivery. After multivariate analysis, low maternal educational level (no education, OR 5.04 [95% CI 1.61-15.8], class 1-10, OR 3.36 [1.04-10.8] compared to those with higher education) and multiparity (OR 3.1 [1.63-5.74] compared to primiparity) were significant risk factors for a home delivery. Of home deliverers, only 24% used a traditional birth attendant, and over half were unplanned due to precipitate labour or lack of transport. We conclude that poor education and multiparity rather than poverty per se increase the risk of a home delivery in Kathmandu. Training TBAs in this setting would probably not be cost-effective. Community-based midwife-run delivery units could reduce the incidence of unplanned home deliveries.


Asunto(s)
Salas de Parto/estadística & datos numéricos , Parto Domiciliario/estadística & datos numéricos , Aceptación de la Atención de Salud/estadística & datos numéricos , Adulto , Estudios de Casos y Controles , Servicios de Salud Comunitaria/organización & administración , Servicios de Salud Comunitaria/estadística & datos numéricos , Salas de Parto/normas , Demografía , Escolaridad , Femenino , Encuestas de Atención de la Salud , Parto Domiciliario/normas , Humanos , Mortalidad Materna , Partería , Nepal/epidemiología , Embarazo , Factores de Riesgo
19.
BMJ ; 316(7134): 805-11, 1998 Mar 14.
Artículo en Inglés | MEDLINE | ID: mdl-9549449

RESUMEN

OBJECTIVES: To evaluate impact of postnatal health education for mothers on infant care and postnatal family planning practices in Nepal. DESIGN: Randomised controlled trial with community follow up at 3 and 6 months post partum by interview. Initial household survey of study areas to identify all pregnant women to facilitate follow up. SETTING: Main maternity hospital in Kathmandu, Nepal. Follow up in urban Kathmandu and a periurban area southwest of the city. SUBJECTS: 540 mothers randomly allocated to one of four groups: health education immediately after birth and three months later (group A), at birth only (group B), at three months only (group C), or none (group D). INTERVENTIONS: Structured baseline household questionnaire; 20 minute, one to one health education at birth and three months later. MAIN OUTCOME MEASURES: Duration of exclusive breast feeding, appropriate immunisation of infant, knowledge of oral rehydration solution and need to continue breast feeding in diarrhoea, knowledge of infant signs suggesting pneumonia, uptake of postnatal family planning. RESULTS: Mothers in groups A and B (received health education at birth) were slightly more likely to use contraception at six months after birth compared with mothers in groups C and D (no health education at birth) (odds ratio 1.62, 95% confidence interval 1.06 to 2.5). There were no other significant differences between groups with regards to infant feeding, infant care, or immunisation. CONCLUSIONS: Our findings suggest that the recommended practice of individual health education for postnatal mothers in poor communities has no impact on infant feeding, care, or immunisation, although uptake of family planning may be slightly enhanced.


Asunto(s)
Servicios de Planificación Familiar , Educación en Salud , Cuidado del Lactante , Atención Prenatal , Lactancia Materna , Conducta Anticonceptiva , Femenino , Estudios de Seguimiento , Humanos , Inmunización/estadística & datos numéricos , Lactante , Fenómenos Fisiológicos Nutricionales del Lactante , Recién Nacido , Masculino , Nepal , Estado Nutricional , Percepción , Embarazo , Pronóstico
20.
J Trop Pediatr ; 44(1): 15-7, 1998 02.
Artículo en Inglés | MEDLINE | ID: mdl-9538600

RESUMEN

We assessed the sensitivity, specificity and likelihood ratio of a low cost liquid crystal strip thermometer (LCT) compared with axillary mercury thermometry for the detection of neonatal hypothermia in Nepal. The subjects were 76 healthy newborns in the government maternity hospital of Kathmandu, Nepal in winter. The validity of LCT for the detection of neonatal hypothermia (less than 36 degrees C) showed a sensitivity of 83 per cent, specificity 96 per cent, positive predictive value 98 per cent and a likelihood ratio of 23. Use of LCT on newborns in this setting raises a measured pretest probability of first day hypothermia of 63 per cent to a post-test probability of 97 per cent. Liquid crystal thermometry is a simple, low-cost, and valid method for identifying core hypothermia in newborns. It is ideal for isolated rural communities where LCT strips could be added to delivery kits.


Asunto(s)
Hipotermia/diagnóstico , Termómetros , Femenino , Humanos , Recién Nacido , Funciones de Verosimilitud , Masculino , Nepal , Reproducibilidad de los Resultados , Sensibilidad y Especificidad
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