RESUMEN
We investigated the association between Buruli ulcer and HIV by comparing the HIV-1/2 seroprevalence in a series of 426 Buruli ulcer patients and a sample of 613 residents of southern Benin. The overall HIV prevalence was 2.6% (11/426) among patients and 0.3% among controls (2/613), giving an odds ratio for the association between HIV and Buruli ulcer of 8.1 (95% confidence interval = 1.8-75; P = 0.003).
Asunto(s)
Úlcera de Buruli/virología , Infecciones por VIH/microbiología , VIH , Mycobacterium ulcerans , Adolescente , Adulto , Benin/epidemiología , Úlcera de Buruli/epidemiología , Estudios de Casos y Controles , Niño , Femenino , Humanos , Incidencia , Masculino , Persona de Mediana Edad , Oportunidad Relativa , Prevalencia , RiesgoRESUMEN
We conducted a case-control study to investigate the association between Buruli ulcer (BU) and environmental- and health-related behaviors in southern Benin. Hospital BU cases (N = 324) and sex- and age-matched neighborhood controls (N = 1,173) answered a questionnaire. Regular use of soap for washing, treating injuries with soap or antibiotic powder, and frequent contact with flowing water appeared protective against BU.
Asunto(s)
Úlcera de Buruli/epidemiología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Benin/epidemiología , Estudios de Casos y Controles , Niño , Preescolar , Humanos , Lactante , Persona de Mediana Edad , Mycobacterium ulcerans/aislamiento & purificación , Factores de RiesgoRESUMEN
Risk factors for Buruli ulcer (BU) are poorly understood. We conducted a case-control study in southern Benin to investigate the association between haemoglobin variants S or C and BU, and particularly the association between haemoglobinopathies HbSS/SC and BU osteomyelitis. We compared the haemoglobin genotype of 179 patients with BU and 44 with BU osteomyelitis to that of 242 community controls. We found no evidence of an increased risk of BU according to the presence of haemoglobin variants S and/or C [odds ratio adjusted for sex, age, region of residence and ethnicity: 1.24 (95% CI: 0.80-1.93), P = 0.34]. Haemoglobin variants S and C are unlikely to play a role in the BU burden. However, haemoglobinopathies HbSS/SC were more frequent among BU osteomyelitis patients than among controls (6.8% vs. 1.0%, Fisher's exact P-value = 0.045), which may suggest that those disorders facilitate growth of Mycobacterium ulcerans in the bone matrix.
Asunto(s)
Hemoglobinas/genética , Infecciones por Mycobacterium no Tuberculosas/genética , Mycobacterium ulcerans/genética , Adolescente , Adulto , Distribución por Edad , Anciano , Anciano de 80 o más Años , Anemia de Células Falciformes/complicaciones , Anemia de Células Falciformes/epidemiología , Anemia de Células Falciformes/genética , Benin/epidemiología , Estudios de Casos y Controles , Niño , Preescolar , Femenino , Frecuencia de los Genes , Genotipo , Hemoglobina C/genética , Enfermedad de la Hemoglobina C/complicaciones , Enfermedad de la Hemoglobina C/epidemiología , Enfermedad de la Hemoglobina C/genética , Hemoglobina Falciforme/genética , Humanos , Lactante , Masculino , Persona de Mediana Edad , Infecciones por Mycobacterium no Tuberculosas/complicaciones , Infecciones por Mycobacterium no Tuberculosas/epidemiología , Osteomielitis/complicaciones , Osteomielitis/epidemiología , Osteomielitis/genética , Factores de Riesgo , Distribución por SexoRESUMEN
Peritoneal endometriosis (PE) and deep endometriotic nodules (DEN) are gynecological diseases recently shown to be associated with elevated serum concentrations of organochlorines. The objective of the present study was to compare risk factors associated with both forms of the disease, with a particular attention to potential sources of organochlorine exposure. This matched case-control study with prospective recruitment included 88 triads (PE-DEN-control). All women were face-to-face interviewed with a standardized questionnaire, and serum dioxin and polychlorinated biphenyl measurements were available for 58 of them. Alcohol consumption (odds ratio (OR): 5.82 [confidence interval at 95% (95%CI) 1.20-28.3]) in DEN and low physical activity at work for DEN (OR: 4.58 [95%CI 1.80-11.62]) and PE (OR: 5.61 [95%CI 1.90-16.60]) were traced as significant risk factors. Organochlorine-related factors (use of tampons, occupational or environmental exposure) were not related to the disease. The current consumption of foodstuffs that were more likely to contribute to organochlorine body burden did not differ among the groups. Only some of these fatty foodstuffs (marine fish, pig meat) were traced by multiple regression analysis as significant determinants of organochlorine body burden, explaining only a small fraction (20%) of the interindividual variation of organochlorine body burden. We conclude that PE and DEN share similar patterns of risk or protective factors.
Asunto(s)
Consumo de Bebidas Alcohólicas/efectos adversos , Endometriosis/etiología , Actividad Motora , Enfermedades Uterinas/etiología , Adulto , Bélgica/epidemiología , Benzofuranos/sangre , Estudios de Casos y Controles , Anticonceptivos Orales/uso terapéutico , Dibenzofuranos Policlorados , Grasas de la Dieta , Endometriosis/sangre , Endometriosis/epidemiología , Exposición a Riesgos Ambientales , Contaminantes Ambientales/sangre , Femenino , Humanos , Lactancia , Paridad , Bifenilos Policlorados/sangre , Dibenzodioxinas Policloradas/análogos & derivados , Dibenzodioxinas Policloradas/sangre , Embarazo , Factores de Riesgo , Enfermedades Uterinas/sangre , Enfermedades Uterinas/epidemiologíaRESUMEN
BCG remains the only possible prophylactic intervention against Buruli ulcer (BU). Estimating its public health impact on BU control is an important issue. We conducted a case-control study to investigate the vaccine effectiveness of routine BCG vaccine against BU in southern Benin. From August 2002 to August 2003, BCG vaccination status was obtained for 279 clinically diagnosed BU cases and 988 age- and sex-matched neighborhood controls. BCG coverage, which was estimated by the presence of a scar or a vaccination record, was 64.5% in cases and 67.2% in controls. There was no evidence of a protective effect of routine BCG vaccination against BU in southern Benin (vaccine effectiveness adjusted for socioeconomic status = 12%, 95% confidence interval = -24% to 37%).
Asunto(s)
Vacuna BCG , Infecciones por Mycobacterium no Tuberculosas/prevención & control , Mycobacterium ulcerans , Enfermedades Cutáneas Bacterianas/prevención & control , Úlcera Cutánea/prevención & control , Adolescente , Adulto , Factores de Edad , Anciano , Anciano de 80 o más Años , Vacuna BCG/normas , Benin , Estudios de Casos y Controles , Niño , Preescolar , Femenino , Humanos , Lactante , Masculino , Persona de Mediana Edad , Mycobacterium ulcerans/inmunología , Factores Sexuales , Enfermedades Cutáneas Bacterianas/microbiología , Úlcera Cutánea/microbiología , Factores Socioeconómicos , Encuestas y CuestionariosRESUMEN
OBJECTIVE: To investigate the possible association between the body burden of dioxin-like compounds and endometriotic disease. DESIGN: Case-control study. SETTING: Gynecology ward in a university hospital. PATIENT(S): Seventy-one women with peritoneal endometriosis (n = 25) or deep endometriotic (adenomyotic) nodules (n = 25) and controls (n = 21). INTERVENTION(S): Collection of 200 mL of blood (fasted) and face-to-face interview. MAIN OUTCOME MEASURE(S): Assessment of dioxin (PCDD), furan (PCDF), and dioxin-like PCB serum concentrations (picograms toxic equivalent [TEQ]/g lipids). RESULT(S): Age and body mass index were traced by linear multiple regression as determinants of total TEQ levels. After standardization for these variables (30 years and 22.5 kg/m2), the mean TEQ levels were 24.21 (controls), 30.62 (peritoneal endometriosis), and 37.60 (deep endometriotic [adenomyotic] nodules) pg TEQ/g lipids. Logistic regression analysis indicated a significantly increased risk of deep endometriotic (adenomyotic) nodules (odds ratio [OR], 3.3; 95% confidence interval [CI], 1.4-7.6) for an increment of 10 pg in total TEQ levels/g lipids. An increased risk was also found for peritoneal endometriosis (OR, 1.9; 95% CI, 0.9-3.8) for total TEQ levels and for dioxins alone (OR, 3.2; 95% CI, 1.0-9.9). CONCLUSION(S): The results provide the first epidemiological evidence of an association between increased PCDD/PCDF and PCB body burden and endometriosis.
Asunto(s)
Dioxinas/sangre , Endometriosis/sangre , Endometriosis/patología , Peritoneo/metabolismo , Peritoneo/patología , Adulto , Estudios de Casos y Controles , Distribución de Chi-Cuadrado , Femenino , Humanos , Modelos Logísticos , Estadísticas no ParamétricasRESUMEN
To explore whether the placenta contributes to the lipoprotein metabolism of pregnant women, we took advantage of the fact that placental proteins are encoded from the fetal genome and examined the associations between lipids of 525 pregnant women and the presence, in their newborns, of genetic polymorphisms of LPL and apolipoprotein E (APOE), two genes expressed in placenta. After adjustment for maternal polymorphisms, newborn LPL*S447X was associated with lower triglycerides (-21 +/- 9 mg/dl), lower LDL-cholesterol (LDL-C; -12 +/- 5 mg/dl), lower apoB (-14 +/- 4 mg/dl), higher HDL-C (5 +/- 2 mg/dl), and higher apoA-I (9 +/- 4 mg/dl) in their mothers; newborn LPL*N291S was associated with higher maternal triglycerides (114 +/- 31 mg/dl); and newborn APOE*E2 (compared to E3E3) was associated with higher maternal LDL-C (14 +/- 6 mg/dl) and higher maternal apoB (14 +/- 5 mg/dl). These associations (all P < 0.05) were independent of polymorphisms carried by the mothers and of lipid concentrations in newborns and were similar in amplitude to the associations between maternal polymorphisms and maternal lipids. Such findings support the active role of placental LPL and APOE in the metabolism of maternal lipoproteins and suggest that fetal genes may modulate the risk for problems related to maternal dyslipidemia (preeclampsia, pancreatitis, and future cardiovascular disease).
Asunto(s)
Lipoproteínas/metabolismo , Polimorfismo Genético , Adulto , Apolipoproteína C-III , Apolipoproteínas C/genética , Apolipoproteínas E/genética , Colesterol/metabolismo , LDL-Colesterol/sangre , Femenino , Frecuencia de los Genes , Genoma Humano , Humanos , Recién Nacido , Lípidos/química , Lipoproteínas/química , Masculino , Análisis Multivariante , Fenotipo , Placenta/metabolismo , Embarazo , Complicaciones Cardiovasculares del Embarazo , Triglicéridos/metabolismoRESUMEN
OBJECTIVE: A lack of global cardiovascular (CV) risk approach is often observed in the clinical practice. Having conceived a clinical strategy aimed at helping general practitioners (GPs) to assess and manage global CV risk in the daily practice, we wanted to evaluate the impact of a training promoting this strategy. METHODS: Randomised controlled trial involving GPs registered in a continual medical education (CME) group. The intervention and control arms included 7 (123 GPs) and 13 (220 GPs) groups, respectively. The intervention was a training in CV prevention provided during a CME meeting. GPs answered a questionnaire four months after the training. The main outcome was the use of a global CV risk assessment tool. Secondary outcomes were the GPs' awareness of the CV diseases burden, knowledge of the CV risk factors, and CV therapeutic attitudes. RESULTS: More trained GPs (76% vs. 52%) used a global CV risk assessment tool (p = 0.003). Significant differences were also observed for secondary outcomes: (a) awareness of CV diseases burden: more trained GPs were aware of the lethality from myocardial infarction (37% vs. 21%, p = 0.047) and considered it as the main cause of sudden death in adults (78% vs. 59%, p = 0.018); (b) knowledge of risk factors: more trained GPs considered familial CV history (89% vs. 73%, p = 0.021) and HDL-cholesterol (82% vs. 62%, p = 0.013) as important CV risk factors; (c) therapeutic attitudes: fewer trained GPs used to prescribe a lipid-lowering drug based on a total cholesterol value without considering the other risk factors (44% vs. 65%, p = 0.013). CONCLUSIONS: The global CV risk approach in the general practice was favourably influenced by this training provided during a CME meeting. The impact of the training on patients' outcomes should be addressed in a prospective trial.
Asunto(s)
Enfermedades Cardiovasculares/prevención & control , Educación Médica Continua , Medicina Familiar y Comunitaria/educación , Humanos , Modelos Logísticos , Pautas de la Práctica en Medicina , Medición de RiesgoRESUMEN
OBJECTIVES: To investigate the virological outcome of chronic hepatitis B (CH-B) in children who received interferon alpha (IFN) compared with no treatment. METHODS: Seventy-four children with CH-B (median age, 6.1 years; 44 boys) selected from a cohort of 158 cases were included and divided into two groups: IFN-treated (n = 37) and control (n = 37). The controls were matched with the treated children by baseline alanine aminotransferase (ALT) levels, sex and age. The Kaplan-Meier method was performed to estimate the time to clearance of hepatitis B e antigen (HbeAg) and hepatitis B surface antigen (HbsAg). RESULTS: Mean duration of follow-up was comparable in two groups (5.2 +/- 3.8 years in treatment group versus 5.2 +/- 3.7 years in control group, NS). HBeAg and HBsAg loss occurred in 20 (54.1%) and three treated children versus 13 (35.1%) and one untreated children (NS), respectively. The 7-year cumulative HBeAg and HBsAg clearance rates were 47.5% and 8.9% after the first visit in the treatment group versus 33.5% and 4.0% in untreated children (NS), respectively. Elevated baseline ALT (two times upper limit of normal) had a significant effect on the long-term cumulative rate of HBeAg seroconversion in treated patients (P = 0.01) but not in the untreated group. CONCLUSIONS: These findings show that the overall long-term virological outcome does not differ significantly between IFN-treated and untreated children but that a significant benefit of treatment on the long term rate of HBeAg seroconversion is obtained in children with higher baseline ALT levels.
Asunto(s)
Alanina Transaminasa/sangre , Antivirales/uso terapéutico , Antígenos de Superficie de la Hepatitis B/sangre , Antígenos e de la Hepatitis B/sangre , Hepatitis B Crónica/tratamiento farmacológico , Interferón-alfa/uso terapéutico , Niño , Preescolar , Estudios de Cohortes , Femenino , Antígenos de Superficie de la Hepatitis B/análisis , Antígenos e de la Hepatitis B/análisis , Hepatitis B Crónica/sangre , Humanos , Masculino , Resultado del TratamientoRESUMEN
Environmental chemicals with oestrogen-like activity are suspected aetiological factors of endometriosis. In animal experiments, cadmium was recently shown to possess oestrogen-like properties. In the frame of a case-control study designed to investigate environmental risk factors for endometriosis, we compared cadmium urinary excretion (CdU) and blood concentration in 59 patients with peritoneal endometriosis, deep endometriotic (adenomyotic) nodules of the recto-vaginal septum and controls. After standardisation for age (30 years) and smoking status, the mean levels of cadmium in urine were (geometric mean [geometric S.D.]) 0.25 [1.50], 0.29 [1.76] and 0.26 [1.46] microg/g creatinine, respectively. Cadmium concentrations in blood did not differ among the three groups. These data, therefore, do not support a role for cadmium in the onset or the growth of endometriosis or deep endometriotic (adenomyotic) nodules of the recto-vaginal septum.
Asunto(s)
Cadmio/metabolismo , Endometriosis/metabolismo , Enfermedades del Ovario/metabolismo , Adulto , Bélgica , Biomarcadores/análisis , Carga Corporal (Radioterapia) , Estudios de Casos y Controles , Endometriosis/patología , Femenino , Humanos , Enfermedades del Ovario/patologíaRESUMEN
AIMS: To estimate the prevalence of psychiatric symptoms in the Kampong Cham province and to determine the association between these symptoms and an impaired social functioning. METHODS: Cross-sectional cluster sample survey conducted among adults randomly selected within 50 clusters distributed over the province. METHODS: Of the respondents, 42.4% reported symptoms that met the Diagnostic and Statistical Manual of Mental Disorders, 4th edition criteria for depression, 53% displayed high anxiety symptoms and 7.3% met posttraumatic stress disorder (PTSD) criteria. Posttraumatic symptoms of intrusion and avoidance were present in 47.8% and 45.4% respectively. When reviewing comorbidities, 29.2% had depression and anxiety symptoms, 16.5% anxiety symptoms, 6.1% depression and 7.1% had triple comorbidity (PTSD, depression and anxiety). Regarding social functioning, 25.3% reported being socially impaired. Respondents with comorbid symptoms for depression, anxiety and PTSD were associated with an increased risk for social impairment compared with others. Being over 65 years and having experienced violent events were other factors associated with social impairment. CONCLUSION: Five years after the return of a more stable context in Cambodia, the prevalence of psychiatric symptoms in the community remains high. In addition, these symptoms are strongly associated with social impairment. This suggests that beyond psychosocial programs, the implementation of adapted clinical psychiatric care should be considered as a priority.
Asunto(s)
Familia/psicología , Trastornos Mentales/etnología , Encuestas y Cuestionarios , Adulto , Ansiedad/etnología , Cambodia/epidemiología , Análisis por Conglomerados , Comorbilidad , Estudios Transversales , Demografía , Depresión/epidemiología , Femenino , Estado de Salud , Humanos , Masculino , Trastornos Mentales/epidemiología , Persona de Mediana Edad , Aceptación de la Atención de Salud , Conducta Social , Trastornos por Estrés Postraumático/etnologíaRESUMEN
BACKGROUND: Factors determining lipoprotein concentrations in the fetus are not yet fully understood. We postulated that an important factor is the genetic make-up of the mother. In the present study, we examined the associations between the cord blood concentrations of lipoproteins of 525 newborns and the polymorphisms present in their mothers on the genes of apolipoprotein E (APOE*E2, *E3, *E4), apolipoprotein C-III (APOC3*C3238G also called APOC3*S2) and lipoprotein lipase (LPL*S447X). RESULTS: Newborns born of mothers with APOE*E2 allele had significantly lower cord blood LDL-C (P < 0.01) and apoB (P < 0.01) and significantly higher cord blood HDL-C and apoA1 (all P-values < 0.03) compared to those born of mothers with APOE*E3E3 genotype. These associations were independent of the presence of APOE*E2 allele in the newborns. Similarly, APOC3*S2 in mothers was associated with significantly lower (all P < 0.001) cord blood LDL-C, apoB, HDL-C and apoA1. In contrast, LPL*S447X in mothers lowered significantly cord blood LDL-C and apoB only when LPL*S447X was present in newborns. Most of the effects of these maternal polymorphisms on the newborns were independent of the changes of maternal lipoproteins generated by these polymorphisms. CONCLUSIONS: This is the first evidence that maternal genetic variations influence fetal lipoprotein concentrations, independent of the genetic status of the fetus and of the variations of maternal lipoprotein concentrations generated by these genetic variants. It suggests that proteic components of maternal lipoproteins strongly control the metabolism of maternal lipoproteins carried out at the surface of the placenta to assure the cholesterol delivery to the fetus.
Asunto(s)
Apolipoproteínas C/genética , Apolipoproteínas E/genética , Feto/química , Lipoproteína Lipasa/genética , Lipoproteínas/análisis , Alelos , Apolipoproteína C-III , Apolipoproteínas B/sangre , HDL-Colesterol/sangre , LDL-Colesterol/sangre , Femenino , Sangre Fetal/química , Humanos , Recién Nacido , Polimorfismo Genético , EmbarazoRESUMEN
The sum of bulk polychlorobiphenyl levels was significantly higher in women with rectovaginal adenomyosis than in women with endometriosis and controls.
Asunto(s)
Endometriosis/epidemiología , Contaminantes Ambientales/toxicidad , Bifenilos Policlorados/toxicidad , Enfermedades del Recto/epidemiología , Enfermedades Vaginales/epidemiología , Adulto , Índice de Masa Corporal , Endometriosis/inducido químicamente , Femenino , Humanos , Lípidos/sangre , Persona de Mediana Edad , Enfermedades del Recto/inducido químicamente , Enfermedades Vaginales/inducido químicamenteRESUMEN
BACKGROUND: Urban health is a fashionable topic which generates a bulk of research work most often focused on particularities of health problems in urban settings. This focus distracts from the importance of research on how local urban health systems are organized and managed. OBJECTIVE: To analyse the conceptual, managerial and technical problems faced by urban health system policy and organization in sub-Saharan Africa, in order to make recommendations. METHODS: We report here on a research programme carried out to review the available evidence on health system policy and organization in urban areas, and to learn lessons from a number of case studies. RESULTS: First, while the health district approach is usually regarded as a means of implementing primary health care in rural areas, we argue that it is likewise appropriate - theoretically and empirically - for the formulation and implementation of a coherent and effective health system in urban areas. Secondly, we concentrate on a number of contextual features that have to be taken into account in order to strengthen district organization and management in the urban context. Spatial, managerial and technical constraints which do not exist in rural areas, proliferation and fragmentation of uncontrolled health services in the private sector, lack of control over political power of the large national and university hospitals, insufficient governance and leadership of the urban health authorities are pointed out for attention. Having noted and thoroughly analysed these issues is not to suggest therefore that the health district approach has to be rejected but that it has to be modified and adapted in key respects. Thirdly, we outline district health system strengthening in the cities as a policy option less fashionable but more appropriate, including the World Bank agenda for reform, the sector-wide approaches for health development, the health promotion approaches based on the Ottawa Charter, and the poverty reduction approaches focusing on coping strategies of local actors. CONCLUSION: Greater achievements could be reached by urban health systems in sub-Saharan Africa if they were organized and structured according to a health district policy. Key elements of such an organizational and managerial strategy should be realistically understood and assessed so as to provide health managers with a suitable tool for the successful development of primary health care in urban settings. Given the identified contextual constraints, implementation of a district health system in an urban context appears to depend mainly on political will and decision. It calls only incidentally for technical solutions. The following are among the most important requirements that have to be taken into account: ensuring appropriate allocation of resources to a legitimate urban health authority responsible for effective co-ordination of the many actors involved in urban health, setting out key developmental guidelines for the big city hospitals and effective communication channels with these institutions, ensuring development regulation and good governance of the private health sector. The role of the state remains crucial in this perspective.