Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 33
Filtrar
Mais filtros

País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
J Nutr ; 150(4): 910-917, 2020 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-31875480

RESUMO

BACKGROUND: In contrast with the ample literature on within- and between-country inequalities in breastfeeding practices, there are no multi-country analyses of socioeconomic disparities in breastmilk substitute (BMS) consumption in low- and middle-income countries (LMICs). OBJECTIVE: This study aimed to investigate between- and within-country socioeconomic inequalities in breastfeeding and BMS consumption in LMICs. METHODS: We examined data from the Demographic Health Surveys and Multiple Indicator Cluster Surveys conducted in 90 LMICs since 2010 to calculate Pearson correlation coefficients between infant feeding indicators and per capita gross domestic product (GDP). Within-country inequalities in exclusive breastfeeding, intake of formula or other types of nonhuman milk (cow/goat) were studied for infants aged 0-5 mo, and for continued breastfeeding at ages 12-15 mo through graphical presentation of coverage wealth quintiles. RESULTS: Between-country analyses showed that log GDP was inversely correlated with exclusive (r = -0.37, P < 0.001) and continued breastfeeding (r = -0.74, P < 0.0001), and was positively correlated with formula intake (r = 0.70, P < 0.0001). Continued breastfeeding was inversely correlated with formula (r = -0.79, P < 0.0001), and was less strongly correlated with the intake of other types of nonhuman milk (r = -0.40, P < 0.001). Within-country analyses showed that 69 out of 89 did not have significant disparities in exclusive breastfeeding. Continued breastfeeding was significantly higher in children belonging to the poorest 20% of households compared with the wealthiest 20% in 40 countries (by ∼30 percentage points on average), whereas formula feeding was more common in the wealthiest group in 59 countries. CONCLUSIONS: BMS intake is positively associated with GDP and negatively associated with continued breastfeeding in LMICs. In most countries, BMS intake is positively associated with family wealth, and will likely become more widespread as countries develop. Urgent action is needed to protect, promote, and support breastfeeding in all income groups and to reduce the intake of BMS, in light of the hazards associated with their use.


Assuntos
Países Desenvolvidos , Países em Desenvolvimento , Renda , Fórmulas Infantis , Aleitamento Materno , Feminino , Saúde Global , Humanos , Lactente , Recém-Nascido , Masculino , Mães , Classe Social , Fatores Socioeconômicos , Inquéritos e Questionários
2.
J Clean Prod ; 222: 436-445, 2019 Jun 10.
Artigo em Inglês | MEDLINE | ID: mdl-31190697

RESUMO

Breastfeeding is one of the foundations of child health, development and survival. Breastmilk substitutes (BMS) are associated with negative influences on breastfeeding practices and subsequent health concerns and, as with all foods, production and consumption of BMS comes with an environmental cost. The carbon footprint (CFP) of production and consumption of BMS was estimated in this study. To illustrate regional differences among the largest producers and consumers, the CFP of BMS production in New Zealand, United States (USA), Brazil and France and the CFP of BMS consumption in United Kingdom (UK), China, Brazil and Vietnam were assessed. The CFP values were then compared with the CFP of breastfeeding arising from production of the additional food needed for breastfeeding mothers to maintain energy balance (approximately 500 kcal per day). The CFP of production was estimated to be 9.2 ±â€¯1.4, 7.0 ±â€¯1.0, 11 ±â€¯2 and 8.4 ±â€¯1.3 kg CO2e per kg BMS in New Zealand, USA, Brazil and France, respectively, with the largest contribution (68-82% of the total) coming from production of raw milk. The CFP of consumption, which included BMS production, emissions from transport, production and in-home sterilisation of bottles, and preparation of BMS, was estimated to be 11 ±â€¯1, 14 ±â€¯2, 14 ±â€¯2 and 11 ±â€¯1 kg CO2e per kg BMS in UK, China, Brazil and Vietnam, respectively. Comparison of breastfeeding with feeding BMS showed a lower CFP from breastfeeding in all countries studied. However, the results were sensitive to the method used to allocate emissions from raw milk production on different dairy processing co-products (i.e. BMS, cream, cheese and lactose). Using alternative allocation methods still resulted in lower CFP from breastfeeding, but only slightly for UK, Brazil and Vietnam. Care is also needed when interpreting findings about products that are functionally different as regards child health and development.

3.
Lancet ; 387(10017): 491-504, 2016 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-26869576

RESUMO

Despite its established benefits, breastfeeding is no longer a norm in many communities. Multifactorial determinants of breastfeeding need supportive measures at many levels, from legal and policy directives to social attitudes and values, women's work and employment conditions, and health-care services to enable women to breastfeed. When relevant interventions are delivered adequately, breastfeeding practices are responsive and can improve rapidly. The best outcomes are achieved when interventions are implemented concurrently through several channels. The marketing of breastmilk substitutes negatively affects breastfeeding: global sales in 2014 of US$44·8 billion show the industry's large, competitive claim on infant feeding. Not breastfeeding is associated with lower intelligence and economic losses of about $302 billion annually or 0·49% of world gross national income. Breastfeeding provides short-term and long-term health and economic and environmental advantages to children, women, and society. To realise these gains, political support and financial investment are needed to protect, promote, and support breastfeeding.


Assuntos
Aleitamento Materno/economia , Aleitamento Materno/tendências , Investimentos em Saúde , Emprego/economia , Feminino , Indústria Alimentícia/economia , Produto Interno Bruto , Humanos , Lactente , Inteligência , Marketing , Substitutos do Leite/economia , Mulheres Trabalhadoras
4.
Lancet ; 387(10017): 475-90, 2016 Jan 30.
Artigo em Inglês | MEDLINE | ID: mdl-26869575

RESUMO

The importance of breastfeeding in low-income and middle-income countries is well recognised, but less consensus exists about its importance in high-income countries. In low-income and middle-income countries, only 37% of children younger than 6 months of age are exclusively breastfed. With few exceptions, breastfeeding duration is shorter in high-income countries than in those that are resource-poor. Our meta-analyses indicate protection against child infections and malocclusion, increases in intelligence, and probable reductions in overweight and diabetes. We did not find associations with allergic disorders such as asthma or with blood pressure or cholesterol, and we noted an increase in tooth decay with longer periods of breastfeeding. For nursing women, breastfeeding gave protection against breast cancer and it improved birth spacing, and it might also protect against ovarian cancer and type 2 diabetes. The scaling up of breastfeeding to a near universal level could prevent 823,000 annual deaths in children younger than 5 years and 20,000 annual deaths from breast cancer. Recent epidemiological and biological findings from during the past decade expand on the known benefits of breastfeeding for women and children, whether they are rich or poor.


Assuntos
Aleitamento Materno , Saúde Global , Asma/epidemiologia , Neoplasias da Mama/epidemiologia , Criança , Mortalidade da Criança , Pré-Escolar , Diabetes Mellitus Tipo 2/epidemiologia , Feminino , Humanos , Hipersensibilidade/epidemiologia , Renda , Inteligência , Má Oclusão/epidemiologia , Mortalidade Materna , Sobrepeso/epidemiologia
5.
Cochrane Database Syst Rev ; (10): CD010666, 2013 Oct 11.
Artigo em Inglês | MEDLINE | ID: mdl-24114375

RESUMO

BACKGROUND: Micronutrient deficiencies are widespread and compound the effects of HIV disease in children, especially in poor communities. Micronutrient supplements may be effective and safe in reducing the burden of HIV disease. This review is an update of an earlier Cochrane review of micronutrient supplementation in children and adults which found that vitamin A and zinc are beneficial and safe in children exposed to HIV and living with HIV infection (Irlam 2010). OBJECTIVES: To assess whether micronutrient supplements are effective and safe in reducing mortality and morbidity in children with HIV infection. SEARCH METHODS: The CENTRAL, EMBASE, and PubMed databases were searched for randomised controlled trials of micronutrient supplements (vitamins, trace elements, and combinations of these) using the search methods of the Cochrane HIV/AIDS Group. SELECTION CRITERIA: Randomised controlled trials were selected that compared the effects of micronutrient supplements with other supplements, or placebo or no treatment on the primary outcomes of mortality, morbidity, and HIV-related hospitalisations. Indicators of HIV disease progession, anthropometric measures, and any adverse effects of supplementation were secondary outcomes. DATA COLLECTION AND ANALYSIS: Two reviewers independently screened and selected trials for inclusion, assessed the risk of bias using standardised criteria, and extracted data. Review Manager 5.1 was used to calculate the risk ratio (RR) for dichotomous data and the weighted mean difference (WMD) for continuous data, and to perform random effects meta-analysis where appropriate. MAIN RESULTS: We included three new studies in addition to the eight studies in the earlier version of the review (Irlam 2010). Eleven studies with a total of 2412 participants were therefore included: five trials of vitamin A, one trial of vitamin D, two trials of zinc, and three trials of multiple micronutrient supplements. All except one trial were conducted in African children.Vitamin A halved all-cause mortality in a meta-analysis of three trials in African children, had inconsistent impacts on diarrhoeal and respiratory morbidity, and improved short-term growth in a Tanzanian trial. No significant adverse effects were reported.A single small trial of vitamin D in North American adolescents and children demonstrated safety but no clinical benefits. Zinc supplements reduced diarrhoeal morbidity and had no adverse effects on disease progression in one small South African trial. Another trial in South African children with and without HIV infection did not show benefit from the the prophylactic use of zinc or multiple supplements versus vitamin A in the small subgroup of children with HIV infection.Multiple micronutrient supplements at twice the RDA did not alter mortality, growth, or CD4 counts at 12 months in Ugandan children aged one to five years. Short-term supplementation until hospital discharge significantly reduced the duration of all hospital admissions in poorly nourished South African children, and supplementation for six months after discharge improved appetite and nutritional indicators. AUTHORS' CONCLUSIONS: Vitamin A supplementation is beneficial and safe in children with HIV infection. Zinc is safe and appears to have similar benefits on diarrhoeal morbidity in children with HIV as in children without HIV infection. Multiple micronutrient supplements have some clinical benefit in poorly nourished children with HIV infection.Further trials of single supplements (vitamin D, zinc, and selenium) are required to build the evidence base. The long-term effects and optimal composition and dosing of multiple micronutrient supplements require further investigation in children with diverse HIV disease status.


Assuntos
Infecções por HIV/complicações , Infecções por HIV/mortalidade , Micronutrientes/administração & dosagem , Adolescente , Contagem de Linfócito CD4 , Criança , Pré-Escolar , Diarreia/terapia , Hospitalização/estatística & dados numéricos , Humanos , Lactente , Micronutrientes/deficiência , Ensaios Clínicos Controlados Aleatórios como Assunto , Vitamina A/administração & dosagem , Vitamina D/administração & dosagem , Vitaminas/administração & dosagem , Zinco/administração & dosagem
7.
Lancet ; 369(9567): 1107-16, 2007 Mar 31.
Artigo em Inglês | MEDLINE | ID: mdl-17398310

RESUMO

BACKGROUND: Exclusive breastfeeding, though better than other forms of infant feeding and associated with improved child survival, is uncommon. We assessed the HIV-1 transmission risks and survival associated with exclusive breastfeeding and other types of infant feeding. METHODS: 2722 HIV-infected and uninfected pregnant women attending antenatal clinics in KwaZulu Natal, South Africa (seven rural, one semiurban, and one urban), were enrolled into a non-randomised intervention cohort study. Infant feeding data were obtained every week from mothers, and blood samples from infants were taken monthly at clinics to establish HIV infection status. Kaplan-Meier analyses conditional on exclusive breastfeeding were used to estimate transmission risks at 6 weeks and 22 weeks of age, and Cox's proportional hazard was used to quantify associations with maternal and infant factors. FINDINGS: 1132 of 1372 (83%) infants born to HIV-infected mothers initiated exclusive breastfeeding from birth. Of 1276 infants with complete feeding data, median duration of cumulative exclusive breastfeeding was 159 days (first quartile [Q1] to third quartile [Q3], 122-174 days). 14.1% (95% CI 12.0-16.4) of exclusively breastfed infants were infected with HIV-1 by age 6 weeks and 19.5% (17.0-22.4) by 6 months; risk was significantly associated with maternal CD4-cell counts below 200 cells per muL (adjusted hazard ratio [HR] 3.79; 2.35-6.12) and birthweight less than 2500 g (1.81, 1.07-3.06). Kaplan-Meier estimated risk of acquisition of infection at 6 months of age was 4.04% (2.29-5.76). Breastfed infants who also received solids were significantly more likely to acquire infection than were exclusively breastfed children (HR 10.87, 1.51-78.00, p=0.018), as were infants who at 12 weeks received both breastmilk and formula milk (1.82, 0.98-3.36, p=0.057). Cumulative 3-month mortality in exclusively breastfed infants was 6.1% (4.74-7.92) versus 15.1% (7.63-28.73) in infants given replacement feeds (HR 2.06, 1.00-4.27, p=0.051). INTERPRETATION: The association between mixed breastfeeding and increased HIV transmission risk, together with evidence that exclusive breastfeeding can be successfully supported in HIV-infected women, warrant revision of the present UNICEF, WHO, and UNAIDS infant feeding guidelines.


Assuntos
Aleitamento Materno , Infecções por HIV/transmissão , HIV-1 , Alimentos Infantis/efeitos adversos , Transmissão Vertical de Doenças Infecciosas/estatística & dados numéricos , Adolescente , Adulto , Estudos de Coortes , Feminino , Infecções por HIV/mortalidade , Humanos , Lactente , Recém-Nascido , Gravidez , Modelos de Riscos Proporcionais , África do Sul
8.
Am J Clin Nutr ; 85(1): 182-92, 2007 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-17209195

RESUMO

BACKGROUND: Little information on the micronutrient status of HIV-infected (HIV-positive) breastfeeding women is available. OBJECTIVE: The objective was to compare the protein and micronutrient status of South African breastfeeding women by HIV status. DESIGN: Serum albumin, prealbumin, vitamin B-12, folate, retinol, alpha-tocopherol, hemoglobin, ferritin, and zinc concentrations were compared between 92 HIV-positive and 52 HIV-uninfected (HIV-negative) mothers 6, 14, and 24 wk after delivery. C-reactive protein and alpha1-acid glycoprotein were used as proxy indicators of an inflammatory process. RESULTS: Mean albumin and prealbumin were significantly lower in HIV-positive mothers, and a higher proportion of HIV-positive mothers had low albumin concentrations (< 35 g/L). Less than 45% of the mothers were vitamin B-12 or folate sufficient. Significantly more HIV-positive (70.5%) than HIV-negative (46.2%) mothers had marginal vitamin B-12 status (P < 0.05), and mean folate concentrations were lower in HIV-positive mothers (P = 0.05). Mean serum retinol was significantly lower in HIV-positive mothers, even after control for the acute phase response. At 24 wk, 70% of both groups had an alpha-tocopherol deficiency (< 11.6 micromol/L), but no significant difference by HIV status was observed. More HIV-positive (33.3%) than HIV-negative (8.7%) mothers had anemia (P = 0.018), whereas 25% of all mothers had low serum ferritin concentrations. After the acute phase response was controlled for, zinc deficiency was more common in HIV-positive (45.0%) than in HIV-negative (25.0%) mothers (P = 0.05). CONCLUSIONS: Deficiencies in vitamins B-12, folate, alpha-tocopherol, ferritin, and zinc are common in South African breastfeeding mothers. HIV-positive mothers had lower mean serum concentrations of albumin, prealbumin, folate, retinol, and hemoglobin than did HIV-negative mothers.


Assuntos
Soronegatividade para HIV , Soropositividade para HIV/sangue , Lactação/sangue , Micronutrientes/sangue , Micronutrientes/deficiência , Estado Nutricional , Reação de Fase Aguda , Adulto , Aleitamento Materno , Feminino , Ácido Fólico/sangue , Hemoglobinas/análise , Hemoglobinas/metabolismo , Humanos , Estudos Longitudinais , Fenômenos Fisiológicos da Nutrição Materna/fisiologia , Período Pós-Parto/sangue , Estudos Prospectivos , Albumina Sérica/metabolismo , Carga Viral , Vitamina B 12/sangue , Zinco/sangue , alfa-Tocoferol/sangue
10.
BMC Pediatr ; 7: 13, 2007 Mar 17.
Artigo em Inglês | MEDLINE | ID: mdl-17367540

RESUMO

BACKGROUND: Few studies address the use of paediatric highly active antiretroviral therapy (HAART) in Africa. METHODS: We performed a retrospective cohort study to investigate preliminary outcomes of all children eligible for HAART at Sinikithemba HIV/AIDS clinic in KwaZulu-Natal, South Africa. Immunologic, virologic, clinical, mortality, primary caregiver, and psychosocial variables were collected and analyzed. RESULTS: From August 31, 2003 until October 31, 2005, 151 children initiated HAART. The median age at HAART initiation was 5.7 years (range 0.3-15.4). Median follow-up time of the cohort after HAART initiation was 8 months (IQR 3.5-13.5). The median change in CD4% from baseline (p < 0.001) was 10.2 (IQR 5.0-13.8) at 6 months (n = 90), and 16.2 (IQR 9.6-20.3) at 12 months (n = 59). Viral loads (VLs) were available for 100 children at 6 months of which 84% had HIV-1 RNA levels < or = 50 copies/mL. At 12 months, 80.3% (n = 61) had undetectable VLs. Sixty-five out of 88 children (73.8%) reported a significant increase (p < 0.001) in weight after the first month. Eighty-nine percent of the cohort (n = 132) reported < or = 2 missed doses during any given treatment month (> 95%adherence). Seventeen patients (11.3%) had a regimen change; two (1.3%) were due to antiretroviral toxicity. The Kaplan-Meier one year survival estimate was 90.9% (95%confidence interval (CI) 84.8-94.6). Thirteen children died during follow-up (8.6%), one changed service provider, and no children were lost to follow-up. All 13 deaths occurred in children with advanced HIV disease within 5 months of treatment initiation. In multivariate analysis of baseline variables against mortality using Cox proportional-hazards model, chronic gastroenteritis was associated with death [hazard ratio (HR), 12.34; 95% CI, 1.27-119.71) and an HIV-positive primary caregiver was found to be protective against mortality [HR, 0.12; 95% CI, 0.02-0.88). Age, orphanhood, baseline CD4%, and hemoglobin were not predicators of mortality in our cohort. Fifty-two percent of the cohort had at least one HIV-positive primary caregiver, and 38.4% had at least one primary caregiver also on HAART at Sinikithemba clinic. CONCLUSION: This report suggests that paediatric HAART can be effective despite the challenges of a resource-limited setting.


Assuntos
Terapia Antirretroviral de Alta Atividade , Infecções por HIV/tratamento farmacológico , Adolescente , Contagem de Linfócito CD4 , Cuidadores , Criança , Pré-Escolar , Doença Crônica , Estudos de Coortes , Feminino , Gastroenterite/mortalidade , Infecções por HIV/mortalidade , Humanos , Masculino , Cooperação do Paciente , Modelos de Riscos Proporcionais , Estudos Retrospectivos , África do Sul/epidemiologia , Resultado do Tratamento , Carga Viral
11.
J Acquir Immune Defic Syndr ; 75 Suppl 2: S111-S114, 2017 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-28498179

RESUMO

Identifying women living with HIV, initiating them on lifelong antiretroviral treatment (ART), and retaining them in care are among the important challenges facing this generation of health care managers and public health researchers. Implementation research attempts to solve a wide range of implementation problems by trying to understand and work within real-world conditions to find solutions that have a measureable impact on the outcomes of interest. Implementation research is distinct from clinical research in many ways yet demands similar standards of conceptual thinking and discipline to generate robust evidence that can be, to some extent, generalized to inform policy and service delivery. In 2011, the World Health Organization (WHO), with funding from Global Affairs Canada, began support to 6 implementation research projects in Malawi, Nigeria, and Zimbabwe. All focused on evaluating approaches for improving rates of retention in care among pregnant women and mothers living with HIV and ensuring their continuation of ART. This reflected the priority given by ministries of health, program implementers, and researchers in each country to the importance of women living with HIV returning to health facilities for routine care, adherence to ART, and improved health outcomes. Five of the studies were cluster randomized controlled trials, and 1 adopted a matched cohort design. Here, we summarize some of the main findings and key lessons learned. We also consider some of the broader implications, remaining knowledge gaps, and how implementation research is integral to, and essential for, global guideline development and to inform HIV/AIDS strategies.


Assuntos
Comitês Consultivos/organização & administração , Fármacos Anti-HIV/uso terapêutico , Infecções por HIV/prevenção & controle , Transmissão Vertical de Doenças Infecciosas/prevenção & controle , Mães , Complicações Infecciosas na Gravidez/prevenção & controle , Gestantes , Organização Mundial da Saúde , Adulto , Comitês Consultivos/economia , Contagem de Linfócito CD4 , Canadá , Feminino , Infecções por HIV/tratamento farmacológico , Humanos , Malaui/epidemiologia , Área Carente de Assistência Médica , Nigéria/epidemiologia , Aceitação pelo Paciente de Cuidados de Saúde , Gravidez , Complicações Infecciosas na Gravidez/tratamento farmacológico , Serviços de Saúde Rural/organização & administração , Serviços de Saúde Rural/estatística & dados numéricos , Zimbábue/epidemiologia
13.
Am J Clin Nutr ; 82(3): 538-46, 2005 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-16155265

RESUMO

BACKGROUND: The effect of breastfeeding on the nutrition of HIV-infected (HIV+) mothers is unknown. Simple, valid methods are needed for body-composition assessment of HIV+ women. OBJECTIVE: We compared the ability of bioimpedance spectroscopy (BIS) and anthropometry with that of isotope dilution (2H2O) to measure fat-free mass (FFM) and fat mass (FM) in HIV+ and HIV-uninfected (HIV-) breastfeeding South African mothers. DESIGN: Total body water (TBW) content of 68 lactating mothers (20 HIV+, 48 HIV-) was measured 10 wk after delivery by using BIS and 2H2O to measure FFM and FM. Anthropometric measurements included body mass index (BMI; in kg/m2), midupper arm circumference (MUAC), and 4 skinfold thicknesses. RESULTS: TBW, FFM, and FM measurements determined by BIS were correlated with 2H2O measurements in HIV+ (r = 0.664, 0.621, and 0.872, respectively; P < 0.01) and HIV- (r = 0.876, 0.868, and 0.932, respectively; P < 0.001) mothers. TBW measured by BIS was greater than that measured by the 2H2O method in both HIV+ (1.8 L) and HIV- (1.5 L) women; FM or FFM did not differ significantly by method. BMI, MUAC, and all skinfold-thickness measurements correlated strongly (r > 0.62, P < 0.001) with FM measured by 2H2O in both groups. BMI and MUAC correlated (r > 0.64, P < 0.001) with FFM in HIV- mothers but not in HIV+ mothers. CONCLUSIONS: In HIV+ and HIV- breastfeeding mothers, BIS provides an estimate of body composition comparable to that obtained with the 2H2O method. BMI and MUAC are useful in predicting FM in both groups but are not valid measures of FFM in HIV+ mothers.


Assuntos
Tecido Adiposo/metabolismo , Composição Corporal/fisiologia , Infecções por HIV/fisiopatologia , Lactação/metabolismo , Músculo Esquelético/metabolismo , Adolescente , Adulto , Antropometria , Água Corporal/metabolismo , Deutério , Impedância Elétrica , Feminino , Infecções por HIV/metabolismo , Humanos , Técnicas de Diluição do Indicador/normas , Marcação por Isótopo/métodos , Marcação por Isótopo/normas , Fenômenos Fisiológicos da Nutrição Materna , Avaliação Nutricional , Valor Preditivo dos Testes , Sensibilidade e Especificidade , Dobras Cutâneas , Análise Espectral/métodos
15.
AIDS ; 17(3): 407-14, 2003 Feb 14.
Artigo em Inglês | MEDLINE | ID: mdl-12556695

RESUMO

OBJECTIVE: To investigate determinants of breastmilk RNA viral load among HIV-infected South African women, with particular attention to infant feeding mode and subclinical mastitis. DESIGN: Observational, longitudinal study. METHODS: Information on current infant feeding practice and a spot milk sample from each breast were obtained from 145 HIV-infected lactating women at 1, 6 and 14 weeks postpartum. The sodium/potassium (Na+/K+) ratio in milk was taken as an indicator of subclinical mastitis. The association between milk RNA viral load and maternal and infant characteristics was investigated using uni- and multivariate models. RESULTS: Milk viral load was below the limit of detection of the HIV RNA assay (< 200 copies/ml) in 63/185 (34.1%), 73/193 (37.8%) and 68/160 (42.5%) of samples at 1, 6 and 14 weeks, respectively. Multivariate models predicted between 13 and 26% of variability in milk viral load in the first 14 weeks. Low blood CD4 cell count (< 200 x 10(6) cells/l) during pregnancy and raised milk Na+/K+ ratio were significantly associated with raised milk RNA viral load at all times, but there were no consistent associations between infant feeding mode and RNA viral load in milk. There was a non-significant trend for the six infants known to be infected postnatally, compared with the 88 infants who remained uninfected, to have been exposed to breastmilk of higher viral load at each time point. CONCLUSIONS: Breast milk HIV RNA viral load in the first 14 weeks of life varied; high levels were associated with subclinical mastitis and severe maternal immunosuppression. Multivariate models had limited predictive value for milk RNA viral load, illustrating the multiple contributors to viral load.


Assuntos
Aleitamento Materno , Infecções por HIV/virologia , Mastite/virologia , Leite Humano/virologia , RNA Viral/isolamento & purificação , Carga Viral/métodos , Adulto , Feminino , HIV/isolamento & purificação , Infecções por HIV/transmissão , Humanos , Transmissão Vertical de Doenças Infecciosas , Estudos Longitudinais , Masculino , Análise Multivariada , Valor Preditivo dos Testes
17.
J Acquir Immune Defic Syndr ; 67 Suppl 2: S150-6, 2014 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-25310122

RESUMO

The prevent mother-to-child transmission (PMTCT) "cascade" describes the programmatic steps for pregnant and breastfeeding women that influence HIV transmission rates. To this end, HIV-infected pregnant women and mothers need access to health services and adhere to antiretroviral (ARV) prophylaxis or lifetime treatment. Within the cascade, the concept of "retention-in-care" is commonly used as a proxy for adherence to ARV interventions and, even, viral suppression. Yet surprisingly, there is no standard definition of retention-in-care either for the purposes of HIV surveillance or implementation research. Implicit to the concept of retention-in-care is the sense of continuity and receipt of care at relevant time points. In the context of PMTCT, the main challenge for surveillance and implementation research is to estimate effective coverage of ARV interventions over a prolonged period of time. These data are used to inform program management and also to estimate postnatal MTCT rates. Attendance of HIV-infected mothers at clinic at 12-month postpartum is often equated with full retention in PMTCT programs over this period. Yet, measurement approaches that fail to register missed visits, or inconsistent attendance or other missing data in the interval period, fail to capture patterns of attendance and care received by mothers and children and risk introducing systematic errors and bias. More importantly, providing only an aggregated rate of attendance as a proxy for retention-in-care fails to identify specific gaps in health services where interventions to improve retention along the PMTCT cascade are most needed. In this article, we discuss how data on retention-in-care can be understood and analyzed, and what are the implications and opportunities for programs and implementation research.


Assuntos
Fármacos Anti-HIV/uso terapêutico , Aleitamento Materno , Infecções por HIV/tratamento farmacológico , Avaliação de Resultados em Cuidados de Saúde , Cooperação do Paciente , Complicações Infecciosas na Gravidez/tratamento farmacológico , Feminino , Infecções por HIV/complicações , Humanos , Gravidez
18.
PLoS One ; 8(12): e81307, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-24312545

RESUMO

INTRODUCTION: Antiretroviral drug interventions significantly reduce the risk of HIV transmission to infants through breastfeeding. We report diarrhoea prevalence and all-cause mortality at 12 months of age according to infant feeding practices, among infants born to HIV-infected and uninfected mothers in South Africa. METHODS: A non-randomised intervention cohort study that followed both HIV-infected and HIV-uninfected mothers and their infants until 18 months of age. Mothers were supported in their infant feeding choice. Detailed morbidity and vital status data were collected over the first year. At the time, only single dose nevirapine was available to prevent mother-to-child transmission of HIV. RESULTS: Among 2,589 infants, detailed feeding data and vital status were available for 1,082 HIV-exposed infants and 1,155 HIV non-exposed infants. Among exclusively breastfed (EBF) infants there were 9.4 diarrhoeal days per 1,000 child days (95%CI. 9.12-9.82) while among infants who were never breastfed there were 15.6 diarrhoeal days per 1,000 child days (95%CI. 14.62-16.59). Exclusive breastfeeding was associated with fewer acute, persistent and total diarrhoeal events than mixed or no breastfeeding in both HIV-exposed infants and also infants of HIV uninfected mothers. In an adjusted cox regression analysis, the risk of death among all infants by 12 months of age was significantly greater in those who were never breastfed (aHR 3.5, p<0.001) or mixed fed (aHR 2.65, p<0.001) compared with those who were EBF. In separate multivariable analyses, infants who were EBF for shorter durations had an increased risk of death compared to those EBF for 5-6 months [aHR 2.18 (95% CI, 1.56-3.01); p<0.001]. DISCUSSION: In the context of antiretroviral drugs being scaled-up to eliminate new HIV infections among children, there is strong justification for financial and human resource investment to promote and support exclusive breastfeeding to improve HIV-free survival of HIV-exposed and non-exposed infants.


Assuntos
Fármacos Anti-HIV/farmacologia , Aleitamento Materno/estatística & dados numéricos , Diarreia/epidemiologia , Infecções por HIV/transmissão , Transmissão Vertical de Doenças Infecciosas/prevenção & controle , Mães/estatística & dados numéricos , Adulto , Estudos de Coortes , Feminino , Humanos , Lactente , Masculino , População Rural/estatística & dados numéricos , África do Sul/epidemiologia , Adulto Jovem
19.
Epidemiol. serv. saúde ; 25(1): [20], jan.-mar. 2016.
Artigo em Português | LILACS, BDS | ID: biblio-986853

RESUMO

Apesar de seus benefícios estabelecidos, a amamentação não é mais uma norma em muitas comunidades. Os determinantes multifatoriais da amamentação necessitam de medidas de suporte em diversos níveis, de legislações e políticas a atitudes e valores sociais, condições de trabalho e emprego para mulheres, e serviços de saúde para possibilitar que as mulheres amamentem. Quando intervenções relevantes são oferecidas adequadamente, as práticas de amamentação são responsivas e podem melhorar rapidamente. Os melhores resultados são obtidos quando intervenções são implementadas concomitantemente por diversos canais. A propaganda de substitutos ao leite materno afeta negativamente a amamentação: as vendas em todo o mundo em 2014 de 44,8 bilhões de dólares demonstram a grande ambição competitiva da indústria com a alimentação infantil. Não amamentar está associado com menor inteligência e perdas econômicas de aproximadamente 302 bilhões de dólares anualmente ou 0,49% do produto nacional bruto mundial. A amamentação fornece, em curto e longo prazos, vantagens para a saúde, econômicas e ambientais para as crianças, mulheres e para a sociedade. Para alcançar estes ganhos, suporte político e investimento financeiro são necessários para proteger, promover e dar suporte à amamentação.


Assuntos
Humanos , Recém-Nascido , Lactente , Aleitamento Materno , Política de Saúde , Nutrição da Criança , Estilo de Vida Saudável
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA