Globally, more than 10 million people are infected with Trypanosoma cruzi, which causes about 20 000 annual deaths. Although Chagas disease is endemic to certain regions of Latin America, migratory ...flows have enabled its expansion into areas where it was previously unknown. Economic, social and cultural factors play a significant role in its presence and perpetuation. This systematic review aims to provide a comprehensive overview of qualitative research on Chagas disease, both in endemic and non-endemic countries.
Searches were carried out in ten databases, and the bibliographies of retrieved studies were examined. Data from thirty-three identified studies were extracted, and findings were analyzed and synthesized along key themes. Themes identified for endemic countries included: socio-structural determinants of Chagas disease; health practices; biomedical conceptions of Chagas disease; patient's experience; and institutional strategies adopted. Concerning non-endemic countries, identified issues related to access to health services and health seeking.
The emergence and perpetuation of Chagas disease depends largely on socio-cultural aspects influencing health. As most interventions do not address the clinical, environmental, social and cultural aspects jointly, an explicitly multidimensional approach, incorporating the experiences of those affected is a potential tool for the development of long-term successful programs. Further research is needed to evaluate this approach.
Background Globally, more than 10 million people are infected with Trypanosoma cruzi, which causes about 20 000 annual deaths. Although Chagas disease is endemic to certain regions of Latin America, ...migratory flows have enabled its expansion into areas where it was previously unknown. Economic, social and cultural factors play a significant role in its presence and perpetuation. This systematic review aims to provide a comprehensive overview of qualitative research on Chagas disease, both in endemic and non-endemic countries. Methodology/Principal Findings Searches were carried out in ten databases, and the bibliographies of retrieved studies were examined. Data from thirty-three identified studies were extracted, and findings were analyzed and synthesized along key themes. Themes identified for endemic countries included: socio-structural determinants of Chagas disease; health practices; biomedical conceptions of Chagas disease; patient's experience; and institutional strategies adopted. Concerning non-endemic countries, identified issues related to access to health services and health seeking. Conclusions The emergence and perpetuation of Chagas disease depends largely on socio-cultural aspects influencing health. As most interventions do not address the clinical, environmental, social and cultural aspects jointly, an explicitly multidimensional approach, incorporating the experiences of those affected is a potential tool for the development of long-term successful programs. Further research is needed to evaluate this approach.
Abstract Background Assessment of myocardial deformation in Chagas disease may help us to better understand the disease pathophysiology and to detect early myocardial involvement. We aimed to ...characterize myocardial deformation in patients in different forms of Chagas disease and, specifically, assess differences between patients in the indeterminate form and controls. Methods and Results Speckle tracking echocardiography was performed in 98 subjects (22 with Chagas cardiomyopathy, 32 in the indeterminate form, and 44 control subjects) to quantify global and segmental left ventricular (LV) radial strain (RS), circumferential strain (CS), and longitudinal strain (LS). In a subset of patients from the indeterminate and control groups (n = 25), LV peak systolic twist and untwisting velocities were additionally assessed. Global RS, CS, and LS showed a significant decreasing trend across groups. Patients in the indeterminate form had significantly lower global RS and RS in the midinferior segment (median 39.8% vs 49.3% P = .046 and 44.0% vs 56.0% P = .038, respectively) and lower twist and untwisting velocity ( P < .05 for both) compared with control subjects. Conclusion Evaluation of myocardial deformation, particularly of RS, appears to be a sensitive technique for detection of myocardial involvement in patients in the indeterminate form and provides insights into the still unrevealed pathophysiology of Chagas heart involvement.
The number of patients with Chagas disease in Spain has increased significantly. Chronic inflammation and endothelial dysfunction have been considered among the physiopathological mechanisms of ...Chagas heart disease. However, there have been conflicting data from clinical studies. Our purpose was to assess endothelial function and systemic levels of nitric oxide and high-sensitivity C-reactive protein in patients with the indeterminate form and with chronic Chagas cardiomyopathy living in a nonendemic area.
Flow-mediated endothelium-dependent vasodilatation and nitroglycerin-mediated vasodilatation were assessed with high-resolution ultrasound of the brachial artery in 98 subjects (32 with the indeterminate form, 22 with chronic Chagas cardiomyopathy and 44 controls). Nitric oxide and high-sensitivity C-reactive protein levels were measured in peripheral venous blood.
Mean age was 37.6 ± 10.2 years and 60% were female. Nitroglycerin-mediated vasodilatation was significantly reduced in chronic Chagas cardiomyopathy compared to controls (median 16.8% vs 22.5%; P=.03). No significant differences were observed in flow-mediated vasodilatation and nitric oxide levels, although a trend towards lower flow-mediated vasodilatation after correction by baseline brachial artery diameter was observed in chronic Chagas cardiomyopathy. Levels of C-reactive protein were significantly higher in patients with the indeterminate form and with Chagas cardiomyopathy compared with controls (P<.05).
Reduced nitroglycerin-mediated vasodilatation suggesting dysfunction of vascular smooth muscle cells was found in patients with chronic Chagas cardiomyopathy living in a nonendemic area. Higher C-reactive protein levels were observed in the indeterminate form and early stages of chronic Chagas cardiomyopathy, which could be related to the inflammatory response to the infection or early cardiovascular involvement.
The number of patients with Chagas disease in Spain has increased significantly. Chronic inflammation and endothelial dysfunction have been considered among the physiopathological mechanisms of ...Chagas heart disease. However, there have been conflicting data from clinical studies. Our purpose was to assess endothelial function and systemic levels of nitric oxide and high-sensitivity C-reactive protein in patients with the indeterminate form and with chronic Chagas cardiomyopathy living in a nonendemic area.
Flow-mediated endothelium-dependent vasodilatation and nitroglycerin-mediated vasodilatation were assessed with high-resolution ultrasound of the brachial artery in 98 subjects (32 with the indeterminate form, 22 with chronic Chagas cardiomyopathy and 44 controls). Nitric oxide and high-sensitivity C-reactive protein levels were measured in peripheral venous blood.
Mean age was 37.6
±
10.2 years and 60% were female. Nitroglycerin-mediated vasodilatation was significantly reduced in chronic Chagas cardiomyopathy compared to controls (median 16.8% vs 22.5%;
P
=
.03). No significant differences were observed in flow-mediated vasodilatation and nitric oxide levels, although a trend towards lower flow-mediated vasodilatation after correction by baseline brachial artery diameter was observed in chronic Chagas cardiomyopathy. Levels of C-reactive protein were significantly higher in patients with the indeterminate form and with Chagas cardiomyopathy compared with controls (
P
<
.05).
Reduced nitroglycerin-mediated vasodilatation suggesting dysfunction of vascular smooth muscle cells was found in patients with chronic Chagas cardiomyopathy living in a nonendemic area. Higher C-reactive protein levels were observed in the indeterminate form and early stages of chronic Chagas cardiomyopathy, which could be related to the inflammatory response to the infection or early cardiovascular involvement.
El número de pacientes con enfermedad de Chagas ha aumentado de manera significativa en España. La inflamación crónica y la disfunción endotelial han sido consideradas mecanismos fisiopatológicos de la cardiopatía chagásica. Sin embargo, en los estudios clínicos se han obtenido datos contradictorios. Nuestro objetivo fue evaluar la función endotelial y las concentraciones sistémicas de óxido nítrico y proteína C reactiva de alta sensibilidad en pacientes con la forma indeterminada de la enfermedad y con miocardiopatía chagásica crónica que vivían en un área no endémica.
Se determinó la vasodilatación mediada por flujo, dependiente del endotelio, y la vasodilatación mediada por nitroglicerina mediante ecografía de alta resolución de la arteria humeral en 98 individuos (32 con la forma indeterminada de la enfermedad, 22 con miocardiopatía chagásica crónica y 44 controles). Se efectuaron determinaciones de las concentraciones de óxido nítrico y proteína C reactiva de alta sensibilidad en sangre venosa periférica.
La media de edad fue 37,6 ± 10,2 años; el 60% eran mujeres. La vasodilatación mediada por nitroglicerina estaba significativamente reducida en la miocardiopatía chagásica crónica en comparación con los controles (mediana, 16,8 frente a 22,5%; p = 0,03). No se observaron diferencias significativas en la vasodilatación mediada por flujo ni en los valores de óxido nítrico, aunque se vió una tendencia a una menor vasodilatación mediada por flujo tras la corrección según el diámetro basal de la arteria humeral en la miocardiopatía chagásica crónica. Las cifras de proteína C reactiva fueron significativamente mayores en los pacientes con la forma indeterminada de la enfermedad y con miocardiopatía chagásica que en los controles (p < 0,05).
Se observó una reducción de la vasodilatación mediada por nitroglicerina que sugiere una disfunción de las células de músculo liso vascular en pacientes con miocardiopatía chagásica crónica residentes en un área no endémica. Se observaron cifras superiores de proteína C reactiva en la forma indeterminada de la enfermedad y en las fases iniciales de la miocardiopatía chagásica crónica, lo que podría estar relacionado con la respuesta inflamatoria a la infección o la afección cardiovascular temprana.
It has been acknowledged that firms must resort to technology in order to acquire the flexibility needed to meet the challenges posed by the globalization of the economy. The successful adoption of ...new technology has thus become a matter of survival for companies.
Several studies have already highlighted the importance of the manager's behavior in the process of adopting technology. The Stevenson model suggests that this behavior may be situated anywhere on a continuum ranging from the characteristics of the administrator, at one extreme, to those of the entrepreneur, at the other.
Using this model, we conducted a study of senior managers to analyze their behavior in the decision to adopt a new technology. A questionnaire was mailed to 450 of them and in-depth interviews were conducted among 54 others.
Our findings show that in the process of adopting a new technology, half the managers adopted a behavior closer to that of an administrator. The other half acted more like entrepreneurs. This seems to have a major impact on the success of the adoption since we found that managers with an entrepreneurial style were not as successful as those who adopt an administrative style.
Summary Background Mental disorders are major causes of disability worldwide, including in the low-income and middle-income countries least able to bear such burdens. We describe mental health care ...in 17 countries participating in the WHO world mental health (WMH) survey initiative and examine unmet needs for treatment. Methods Face-to-face household surveys were undertaken with 84 850 community adult respondents in low-income or middle-income (Colombia, Lebanon, Mexico, Nigeria, China, South Africa, Ukraine) and high-income countries (Belgium, France, Germany, Israel, Italy, Japan, Netherlands, New Zealand, Spain, USA). Prevalence and severity of mental disorders over 12 months, and mental health service use, were assessed with the WMH composite international diagnostic interview. Logistic regression analysis was used to study sociodemographic predictors of receiving any 12-month services. Findings The number of respondents using any 12-month mental health services (57 2%; Nigeria to 1477 18%; USA) was generally lower in developing than in developed countries, and the proportion receiving services tended to correspond to countries' percentages of gross domestic product spent on health care. Although seriousness of disorder was related to service use, only five (11%; China) to 46 (61%; Belgium) of patients with severe disorders received any care in the previous year. General medical sectors were the largest sources of mental health services. For respondents initiating treatments, 152 (70%; Germany) to 129 (95%; Italy) received any follow-up care, and one (10%; Nigeria) to 113 (42%; France) received treatments meeting minimum standards for adequacy. Patients who were male, married, less-educated, and at the extremes of age or income were treated less. Interpretation Unmet needs for mental health treatment are pervasive and especially concerning in less-developed countries. Alleviation of these unmet needs will require expansion and optimum allocation of treatment resources.
Alcohol, tobacco, and illegal drug use cause considerable morbidity and mortality, but good cross-national epidemiological data are limited. This paper describes such data from the first 17 countries ...participating in the World Health Organization's (WHO's) World Mental Health (WMH) Survey Initiative.
Household surveys with a combined sample size of 85,052 were carried out in the Americas (Colombia, Mexico, United States), Europe (Belgium, France, Germany, Italy, Netherlands, Spain, Ukraine), Middle East and Africa (Israel, Lebanon, Nigeria, South Africa), Asia (Japan, People's Republic of China), and Oceania (New Zealand). The WHO Composite International Diagnostic Interview (CIDI) was used to assess the prevalence and correlates of a wide variety of mental and substance disorders. This paper focuses on lifetime use and age of initiation of tobacco, alcohol, cannabis, and cocaine. Alcohol had been used by most in the Americas, Europe, Japan, and New Zealand, with smaller proportions in the Middle East, Africa, and China. Cannabis use in the US and New Zealand (both 42%) was far higher than in any other country. The US was also an outlier in cocaine use (16%). Males were more likely than females to have used drugs; and a sex-cohort interaction was observed, whereby not only were younger cohorts more likely to use all drugs, but the male-female gap was closing in more recent cohorts. The period of risk for drug initiation also appears to be lengthening longer into adulthood among more recent cohorts. Associations with sociodemographic variables were consistent across countries, as were the curves of incidence of lifetime use.
Globally, drug use is not distributed evenly and is not simply related to drug policy, since countries with stringent user-level illegal drug policies did not have lower levels of use than countries with liberal ones. Sex differences were consistently documented, but are decreasing in more recent cohorts, who also have higher levels of illegal drug use and extensions in the period of risk for initiation.
We previously reported on the cross-national epidemiology of ADHD from the first 10 countries in the WHO World Mental Health (WMH) Surveys. The current report expands those previous findings to the ...20 nationally or regionally representative WMH surveys that have now collected data on adult ADHD. The Composite International Diagnostic Interview (CIDI) was administered to 26,744 respondents in these surveys in high-, upper-middle-, and low-/lower-middle-income countries (68.5% mean response rate). Current DSM-IV/CIDI adult ADHD prevalence averaged 2.8% across surveys and was higher in high (3.6%)- and upper-middle (3.0%)- than low-/lower-middle (1.4%)-income countries. Conditional prevalence of current ADHD averaged 57.0% among childhood cases and 41.1% among childhood subthreshold cases. Adult ADHD was significantly related to being male, previously married, and low education. Adult ADHD was highly comorbid with DSM-IV/CIDI anxiety, mood, behavior, and substance disorders and significantly associated with role impairments (days out of role, impaired cognition, and social interactions) when controlling for comorbidities. Treatment seeking was low in all countries and targeted largely to comorbid conditions rather than to ADHD. These results show that adult ADHD is prevalent, seriously impairing, and highly comorbid but vastly under-recognized and undertreated across countries and cultures.
Abstract Background It is unclear whether the normative sequence of drug use initiation, beginning with tobacco and alcohol, progressing to cannabis and then other illicit drugs, is due to causal ...effects of specific earlier drug use promoting progression, or to influences of other variables such as drug availability and attitudes. One way to investigate this is to see whether risk of later drug use in the sequence, conditional on use of drugs earlier in the sequence, changes according to time-space variation in use prevalence. We compared patterns and order of initiation of alcohol, tobacco, cannabis, and other illicit drug use across 17 countries with a wide range of drug use prevalence. Method Analyses used data from World Health Organization (WHO) World Mental Health (WMH) Surveys, a series of parallel community epidemiological surveys using the same instruments and field procedures carried out in 17 countries throughout the world. Results Initiation of “gateway” substances (i.e. alcohol, tobacco and cannabis) was differentially associated with subsequent onset of other illicit drug use based on background prevalence of gateway substance use. Cross-country differences in substance use prevalence also corresponded to differences in the likelihood of individuals reporting a non-normative sequence of substance initiation. Conclusion These results suggest the “gateway” pattern at least partially reflects unmeasured common causes rather than causal effects of specific drugs on subsequent use of others. This implies that successful efforts to prevent use of specific “gateway” drugs may not in themselves lead to major reductions in the use of later drugs.
PDF
