Trends in extrapulmonary TB cases at three teaching hospitals in Ghana, 2008-2017.

SETTING: Three teaching hospitals in Ghana. OBJECTIVE: To elucidate trends in demographics, clinical characteristics and treatment outcomes in extrapulmonary TB (EPTB) patients. DESIGN: This was a retrospective study involving the review and comparison of EPTB and pulmonary TB (PTB) data from 1 January 2008 to 31 December 2017 in TB registers and treatment cards. RESULTS: Of 15,392 TB cases, 4607 (30%) were EPTB, including 4477/4607 (97%) new cases. There were 2,679/4607 (58%) males and the age range was 0.3 to 96 years. Pleural TB (1021/4607, 22%) was the most common. Treatment success rates for EPTB and PTB were respectively 72% and 84%. HIV positivity was high among patients with disseminated/miliary TB (429/779, 55%) and TB meningitis (242/526, 46%). To note, disseminated/miliary TB (χ2 = 33.53, P < 0.0001) increased, whereas TB meningitis (χ2 = 19.43, P < 0.0001) decreased over the 10-year period. Mortality among EPTB patients was associated with increasing age (⩾25 years), disseminated/miliary TB, TB meningitis and HIV positivity. CONCLUSIONS: There is male preponderance for both EPTB and PTB in Ghana. Increasing age, disseminated/ miliary TB, TB meningitis and HIV are risk factors for mortality among EPTB patients. This emphasises the need for public education on the risk factors for EPTB and preventive strategies.

CONTEXTE: Trois centres hospitalières universitaires au Ghana. OBJECTIF: Elucider les tendances démographiques, les caractéristiques cliniques et les résultats du traitement de patients atteints de TB extrapulmonaire (EPTB) au Ghana. SCHEMA: Ceci est une étude rétrospective de revue et de comparaison des données de EPTB et de TB pulmonaire (PTB) du 1e janvier 2008 au 31 décembre 2017 dans les registres de TB et les cartes de traitement. RESULTATS: Sur 15 392 cas de TB, 4607 (30%) étaient des EPTB dont 4477/4607 (97%) étaient de nouveaux cas. Les hommes représentaient 2679/4607 (58%) et leur âge allait de 0,3 à 96 ans. Une TB pleurale 1021/4607 (22%) était la plus fréquente. Le taux de réussite du traitement de la EPTB et de la PTB a été de 72% et 84%, respectivement. La positivité au VIH était élevée parmi les patients atteints de TB disséminée/miliaire (429/779 ; 55%) et de méningite tuberculeuse (242/526 ; 46%). Il est significatif que la TB disséminée/miliaire (χ2 = 33,53 ; P < 0,0001) a augmenté tandis que la méningite TB (χ2 = 19,43, P < 0,0001) a diminué au long de la période de 10 ans. La mortalité des patients EPTB a été associée à un âge croissant (≥25 ans), une forme disséminée/miliaire, à une méningite TB et à la positivité au VIH. CONCLUSIONS: Il y a une prépondérance masculine à la fois de la EPTB et de la PTB au Ghana. Un âge croissant, une forme disséminée/ miliaire, une méningite TB et le VIH sont des facteurs de risque de mortalité pour les patients EPTB. Ceci met l'accent sur le besoin d'éducation du public relative aux facteurs de risque et aux stratégies de prévention.

Mammography examination among women aged 40 years or older in Ghana: evidence from wave 2 of the World Health Organization's study on global AGEing and adult health multicountry longitudinal study.

OBJECTIVE: To determine the uptake of mammography among Ghanaian women aged 40 years or older and to examine critical risk factors that influence the uptake. STUDY DESIGN: A cross-sectional survey. METHODS: A nationally representative sample of 2787 women and 1948 men aged ≥18 years were surveyed in the Wave 2 (2014-2015) of the World Health Organization's multicountry study on AGEing and adult health in Ghana. Of the 2787 women aged ≥18 years, data on a total of 2301 women aged ≥40 years were included in this study. Univariable and multivariable logistic regression models were applied to examine critical risk factors for mammogram examination. RESULTS: Of the 2301 women sampled, only 83 (3.61%) ever had mammogram. The odds of mammogram examination were lower for women aged ≥70 years (odds ratio [OR] 0.42, 95% confidence interval [CI]: 0.19, 0.93), being self-employed (OR = 0.21, 95% CI: 0.11, 0.42) and being informal sector employee (OR = 0.26, 95% CI: 0.12, 0.57) in the multivariable analyses. Belonging to the Ewe ethnic group (OR=3.41, 95% CI:1.88, 6.16) compared to the Akan group was associated with increased odds of mammogram examination in the multivariable analysis. Women aged ≥70 years, being self-employed, being an informal employee and belonging to the Ewe ethnic group were independently associated with mammography examination. CONCLUSION: The prevalence of screening for breast cancer using mammography among Ghanaian women aged 40 years and older was 3.6%. Age, type of employer and ethnicity were associated with an older adult woman's likelihood to access mammography screening. Overall, our study provided critical data to encourage and promote good health-seeking behaviour in terms of breast cancer screening among older adult women. Further qualitative studies are warranted to explore why some of these factors influence mammography.

The effects of anthracycline drugs on the conformational distribution of mouse P-glycoprotein explains their transport rate differences.

P-glycoprotein (Pgp) is an ATP-dependent efflux transporter and plays a major role in anti-cancer drug resistance by pumping a chemically diverse range of cytotoxic drugs from cancerous tumors. Despite numerous studies with the transporter, the molecular features that drive anti-cancer drug efflux are not well understood. Even subtle differences in the anti-cancer drug molecular structure can lead to dramatic differences in their transport rates. To unmask these structural differences, this study focused on two closely-related anthracycline drugs, daunorubicin (DNR), and doxorubicin (DOX), with mouse Pgp. While only differing by a single hydroxyl functional group, DNR has a 4 to 5-fold higher transport rate than DOX. They both non-competitively inhibited Pgp-mediated ATP hydrolysis below basal levels. The Km of Pgp-mediated ATP hydrolysis extracted from the kinetics curves was lower for DOX than DNR. However, the dissociation constants (KDs) for these drugs determined by fluorescence quenching were virtually identical. Acrylamide quenching of Pgp tryptophan fluorescence to probe the tertiary structure of Pgp suggested that DNR shifts Pgp to a "closed" conformation, while DOX shifts Pgp to an "intermediate" conformation. The effects of these drugs on the Pgp conformational distributions in a lipid bilayer were also examined by atomic force microscopy (AFM). Analysis of AFM images revealed that DNR and DOX cause distinct and significant shifts in the conformational distribution of Pgp. The results were combined to build a conformational distribution model for anthracycline transport by Pgp.

Prevalence and risk factors associated with non-traffic related injury in the older population in Ghana: Wave 2 of the WHO Study on Global AGEing and adult health (SAGE).

Injuries are a significant cause of hospitalization in the older population, leading to a decline in physical activity and greater dependence on others. Compared to traffic related injury, relatively fewer studies have been conducted on non-traffic related injury in the older population in Ghana. This analysis provides a nationwide baseline prevalence and associated factors of non-traffic related injuries among older adults in Ghana. Data from the 2014-2015 nationally representative World Health Organization Study on global AGEing and adult health (SAGE) Ghana Wave 2 was used. A final sample of 3461 older adults living in 2827 households was used in the statistical modelling. Predictors of injury were examined using both single-level and multilevel binary logistic regression models. The prevalence of non-traffic related injury found in this study was 3.74%. The odds of being injured decreased among females (OR = 0.66, 95% CI: 0.46, 0.95) compared to their male counterparts and those who rated their heath state as moderate (OR = 0.59, 95% CI: 0.38, 0.94). Depression was the only risk factor identified in the multivariable model (OR = 2.55, 95%CI: 1.38, 4.71). The study did not observe significant residual household-level variation in injury status. The role of depression as a risk factor suggests that interventions that aim to reduce non-traffic related injury in older adults should consider improving mental health.

Prevalence of and factors associated with frailty and disability in older adults from China, Ghana, India, Mexico, Russia and South Africa.

BACKGROUND: The severe burden imposed by frailty and disability in old age is a major challenge for healthcare systems in low- and middle-income countries alike. The current study aimed to provide estimates of the prevalence of frailty and disability in older adult populations and to examine their relationship with socioeconomic factors in six countries. METHODS: Focusing on adults aged 50+ years, a frailty index was constructed as the proportion of deficits in 40 variables, and disability was assessed using the World Health Organization Disability Assessment Schedule (WHODAS 2.0), as part of the Study on global AGEing and adult health (SAGE) Wave 1 in China, Ghana, India, Mexico, Russia and South Africa. RESULTS: This study included a total of 34,123 respondents. China had the lowest percentages of older adults with frailty (13.1%) and with disability (69.6%), whereas India had the highest percentages (55.5% and 93.3%, respectively). Both frailty and disability increased with age for all countries, and were more frequent in women, although the sex gap varied across countries. Lower levels of both frailty and disability were observed at higher levels of education and wealth. Both education and income were protective factors for frailty and disability in China, India and Russia, whereas only income was protective in Mexico, and only education in South Africa. CONCLUSIONS: Age-related frailty and disability are increasing concerns for older adult populations in low- and middle-income countries. The results indicate that lower levels of frailty and disability can be achieved for older people, and the study highlights the need for targeted preventive approaches and support programs.

Covert contraceptive use among women attending a reproductive health clinic in a municipality in Ghana.

BACKGROUND: Covert contraceptive use (CCU) in sub-Saharan Africa is an indication of women's inability to exercise autonomy in their reproductive choices. The aim of this study was to assess the prevalence and determinants of CCU among a sample of FP clients in a municipality of Ghana. METHODS: We conducted a mixed method study among women attending a public reproductive health clinic in Sunyani, a city of over 250,000 inhabitants in Ghana. An initial survey inquired into sociodemographic characteristics, use of family planning (FP) methods and partner awareness of contraceptive use. The predictors of CCU were explored using logistic regressions. We used the findings to develop a guide which we applied in-depth interviews and focus group discussions with attendants at the same facility. Qualitative data analysis was conducted using a framework approach. RESULTS: We interviewed 300 women, 48 % of whom were aged between 26-33 years. The injectable was the most widely used method (56 %). The prevalence of CCU was 34 %. In multivariate analysis, single women were more likely to practice CCU than married or co-habiting women (Adjusted OR = 12.12, 95 % C.I. 4.73-31.1). Muslim and traditionalist women were similarly more likely to practice CCU than non-Muslim, non-traditionalist (Adjusted OR = 4.56, 2.29-9.06). Women who preferred to have their first or next child in 4 or more years from the time of the interview were more likely to be in CCU than women who intended to have children within 4 years of the interview (2.57; 1.37-4.83). Single women saw in covert use a statement of their social autonomy. To succeed in CCU, women wished that clinic attendance cards would not be given to them to keep at home. Though many participants saw in CCU a source of anxiety, they expected health workers to consider it and uphold confidentiality in the provision of services. CONCLUSIONS: Covert contraceptive use was high in this municipality and being single was the strongest predictor of the practice. Providers of FP services should reflect on how to adequately address the challenges faced by women who practice CCU.

Intake of polyunsaturated fat in relation to mortality among statin users and non-users in the Southern Community Cohort Study.

BACKGROUND AND AIMS: Consumption of polyunsaturated fatty acids (PUFA), especially the n3-series, may protect against cardiovascular disease (CVD), but recent randomized studies have failed to demonstrate these benefits. One of the prevailing hypotheses is that PUFA intake may not confer benefits beyond those provided by statins, but studies comparing statin users to non-users with regard to effects of PUFA are lacking. METHODS AND RESULTS: Black and white men and women (n = 69,559) in the Southern Community Cohort Study were studied. Cox regression models adjusting for age, sex, race, BMI, recruitment site, education, income, smoking, diabetes, and dietary variables were used. RESULTS: At baseline the mean ± SD age was 52 ± 9 years, 60% of participants were women, 54% had hypertension and 16% used statins. We observed modest inverse associations between n3-PUFA and n6-PUFA intake with mortality among non-statin users but not among statin users. In adjusted analyses, the HRs (95% CIs) for all-cause mortality (6,396 deaths over a median of 6.4 years) comparing the highest to the lowest quintile were 0.90 (0.82-1.00) for n3-PUFA and 0.80 (0.70-0.92) for n6-PUFA among non-statin users, whereas they were 1.06 (0.87-1.28) and 0.96 (0.78-1.19) for n3-PUFA and n6-PUFA, respectively, among statin users. CONCLUSIONS: Our results suggest potential benefits of PUFA consumption on mortality which are only apparent in the absence of statin therapy. It seems prudent to consider the potential benefit of PUFA consumption in the primary prevention of CVD among patients who are not candidates for statin therapy but are at increased risk for CVD and mortality.

Predictors of Subjective Well-Being among Older Ghanaians

Background: Later years of life are accompanied by many physical; emotional and environmental changes which may impact on the well-being of the individual. Many factors are known to influence the subjective well-being of older adults; but most; if not all of this information was the result of studies in the Western world. This study aimed at obtaining and documenting the predictors of subjective well-being (SWB) among older Ghanaians. Methods: Data for the study was obtained from the WHO SAGE study. The single item measure of life satisfaction was used to determine subjective wellbeing. Descriptive statistics as well as logistic regression analysis were carried out to determine the predictors of SWB. Results: A total of 4724 individuals aged 50 years and above responded to the questionnaires. Of these 50.4 were males. Following multivariate logistic regression analysis; age; sex; educational level; income and ethnic background were found to significantly affect the SWB of older Ghanaians. Being male was associated with higher level of SWB (OR=1.68; CI: 1.39 - 2.03). For those 50 years and above; being younger (50-59 years) was also associated with a high level of SWB (OR=17.72; CI: 10.13-30.98). Earning a low income and having low educational level were both associated with low levels of SWB (OR=0.304; CI: 0.22-0.42; and OR=0.47; CI: 0.37-0.60 respectively). Ewes (p=0.027); Grumas (p=0.002) and Mole-Dagbons (p=0.04) had significantly higher SWB compared to the other ethnic groups. Conclusion: Among older Ghanaians; factors that positively influence SWB are younger age; male sex; high educational level and high income

Predictors of subjective well-being among older Ghanaians.

BACKGROUND: Later years of life are accompanied by many physical, emotional and environmental changes which may impact on the well-being of the individual. Many factors are known to influence the subjective well-being of older adults, but most, if not all of this information was the result of studies in the Western world. This study aimed at obtaining and documenting the predictors of subjective well-being (SWB) among older Ghanaians. METHODS: Data for the study was obtained from the WHO SAGE study. The single item measure of life satisfaction was used to determine subjective well-being. Descriptive statistics as well as logistic regression analysis were carried out to determine the predictors of SWB. RESULTS: A total of 4724 individuals aged 50 years and above responded to the questionnaires. Of these 50.4% were males. Following multivariate logistic regression analysis, age, sex, educational level, income and ethnic background were found to significantly affect the SWB of older Ghanaians. Being male was associated with higher level of SWB (OR=1.68; CI: 1.39 - 2.03). For those 50 years and above, being younger (50-59 years) was also associated with a high level of SWB (OR=17.72; CI: 10.13-30.98). Earning a low income and having low educational level were both associated with low levels of SWB (OR=0.304; CI: 0.22-0.42; and OR=0.47; CI: 0.37-0.60 respectively). Ewes (p=0.027), Grumas (p=0.002) and Mole-Dagbons (p=0.04) had significantly higher SWB compared to the other ethnic groups. CONCLUSION: Among older Ghanaians, factors that positively influence SWB are younger age, male sex, high educational level and high income.

Antimicrobial residues in foods of animal origin in Africa: public health risks.

The authors report on the current status of work on residues of veterinary medicinal products and, in particular, antimicrobial residues in foods of animal origin. This review focuses on residues of veterinary antimicrobials, antimicrobials used in livestock production, the concept of residues, and antimicrobial residues in foods of animal origin. Only one antimicrobial substance has been approved in the West African Economic and Monetary Union, compared with 16 substances in Benin and 56 in the European Union. The issue of antimicrobial residues in foods of animal origin has rarely been a serious concern in developing countries, in contrast to the situation in Europe. However, while the prevalence of veterinary drug residues in foods of animal origin is less than 1% in Europe, in some African countries it can be as high as 94%. Antimicrobial residues in foods of animal origin can cause allergies, cancer, alterations in the intestinal flora, bacterial resistance and the inhibition of fermentation in the dairy industry. The harmonisation of regulations in Africa could reduce the circulation of prohibited antimicrobials and lead to the implementation of a plan for the control and surveillance of residues from veterinary medicinal products in foods of animal origin.

A review on aflatoxin contamination and its implications in the developing world: a sub-Saharan African perspective.

Mycotoxins contamination in some agricultural food commodities seriously impact human and animal health and reduce the commercial value of crops. Mycotoxins are toxic secondary metabolites produced by fungi that contaminate agricultural commodities pre- or postharvest. Africa is one of the continents where environmental, agricultural and storage conditions of food commodities are conducive of Aspergillus fungi infection and aflatoxin biosynthesis. This paper reviews the commodity-wise aetiology and contamination process of aflatoxins and evaluates the potential risk of exposure from common African foods. Possible ways of reducing risk for fungal infection and aflatoxin development that are relevant to the African context. The presented database would be useful as benchmark information for development and prioritization of future research. There is need for more investigations on food quality and safety by making available advanced advanced equipments and analytical methods as well as surveillance and awareness creation in the region.

The Recent Infection Testing Algorithm (RITA) in clinical practice: a survey of HIV clinicians in England and Northern Ireland.

OBJECTIVES: In order to estimate HIV incidence among high-risk groups, in January 2009 the Health Protection Agency introduced the Recent Infection Testing Algorithm (RITA) in England and Northern Ireland (E&NI), currently the only regions to inform patients of RITA results. This survey of HIV specialists aimed to investigate the role of RITA in patient management and explore clinicians' views on its role in clinical practice and during partner notification. METHODS: An online questionnaire was distributed to HIV specialists via the British HIV Association membership email list in February 2011. RESULTS: Forty-two HIV specialists from 32 HIV centres responded to the survey among 90 centres enrolled in the programme (response rate 36%). Testing for recent infection was considered standard of care by 83% of respondents, 80% felt confident in interpreting results and 92% discussed results with patients, particularly in the context of a possible HIV seroconversion illness (96%) or when deciding when to start antiretroviral therapy (70%). A third (36%) of specialists were initially concerned that RITA results may cause additional anxiety among patients; however, no adverse events were reported. The majority (90%) felt that results could assist with contact tracing by prioritizing patients with likely recent infection. However, only a few centres have currently incorporated RITA into their HIV partner notification protocols. CONCLUSIONS: RITA has been introduced into clinical practice with no reported patient adverse events. Access to results at centre level should be improved. National guidance regarding use of RITA as a tool for contact tracing is required.

The 2011 United Nations high-level meeting on non-communicable diseases: the Africa agenda calls for a 5-by-5 approach.

The High Level Meeting of the 66th Session of the United Nations General Assembly was held in September 2011. The Political Declaration issued at the meeting focused the attention of world leaders and the global health community on the prevention and control of noncommunicable diseases (NCDs). The four major NCDs (cardiovascular diseases, cancer, diabetes and chronic respiratory diseases) and their four risk factors (tobacco use, unhealthy diet, physical inactivity and harmful use of alcohol) constitute the target of the '4-by-4' approach, which is also supported by national and international health organisations. We argue that while preventing these eight NCDs and risk factors is also important in Africa, it will not be enough. A '5-by-5' strategy is needed, addressing neuropsychiatric disorders as the fifth NCD; and transmissible agents that underlie the neglected tropical diseases and other NCDs as the fifth risk factor. These phenomena cause substantial preventable death and disability, and must therefore be prioritised.

Microbiological quality and antibiotic residues in informally marketed raw cow milk within the coastal savannah zone of Ghana.

OBJECTIVES: To investigate the microbiological quality and the presence of antibiotic residues in raw cow milk and in some indigenous milk products produced and marketed by the informal sector in the coastal savannah zone of Ghana. METHODS: Milk samples were aseptically collected from 224 kraals and samples of 26 indigenous milk products were purchased from processors and retailers. Total plate counts, total coliform counts and the presence of Escherichia coli and E. coli O157:H7 were determined in all 250 samples. Milk samples were also tested for antibiotic residues. RESULTS: Total plate counts exceeded 105 CFU/ml in 45.2% of the samples while coliforms exceeded 10³ CFU/ml in 66.0% and E. coli was detected in 11.2%. E. coli was present in raw cow milk but not in the indigenous products and all E. coli isolates were negative for E. coli O157:H7. Antibiotic residues were detected in 3.1% of the raw cow milk samples. CONCLUSION: Bulk milk contains unacceptable levels of hygiene indicators and antibiotic residues and is a potential source of milk-borne infections. The detection of E. coli and antibiotic residues raises public health concerns about the safety of fresh unpasteurized cow milk in the coastal savannah zone of Ghana and calls for improved farm hygiene, the need for milk pasteurization and the sensible use of antibiotics in the milk industry.

Diagnosis of tuberculosis in ghana: the role of laboratory training.

OBJECTIVES: The laboratory is considered the cornerstone of tuberculosis (TB) control programme. International review of Ghana's programme in the late nineties identified the laboratory services as the weakest component. Sputum smear microscopy (SSM) being the main method of diagnosing pulmonary TB in Ghana, the training objectives were to: (i) strengthen the knowledge and skills of laboratory personnel on SSM (ii) impart necessary techniques in biosafety and (iii) introduce a Quality Assurance (QA) system in order to strengthen SSM services. METHODS: Personnel were selected for training during a nationwide situation analysis of SSM centres in 2000/2001. Four training sessions on SSM/QA were held between 2001/2004. RESULTS: A total of 80 personnel were trained: 10 regional TB coordinators and 70 laboratory personnel. The participants upon return to their respective regions also organized training within their districts. This approach resulted in another 100 district TB coordinators and 200 laboratory personnel being trained. Improvement in smear preparation, staining and reading ability of the participants were observed during the post-test and subsequent visit to their respective laboratories. The training has led to strengthening of TB laboratory services in the country and has contributed to increase in case detection from 10,745 in 2000 to 11,827 in 2004 and 14,022 in 2008. It was observed during the post-training follow-up and quarterly supervision visits that morale of the personnel was high. CONCLUSION: Continuous training and re-training of laboratory personnel on SSM and QA at regular intervals do play an important role for effective and efficient TB control programme.

Ischaemic heart disease in Africa.

Ischaemic heart disease (IHD), previously considered rare in sub-Saharan Africa, now ranks 8th among the leading causes of death in men and women in the region. Furthermore, the prevalence of IHD and related morbidity may be increasing as a result of adverse behavioural and lifestyle changes associated with urbanisation and the epidemiological transition. The major risk factors for IHD in sub-Saharan Africa include hypertension, smoking, diabetes, abdominal obesity and dyslipidaemia. In the INTERHEART Africa study, these risk factors contributed a population-attributable risk of nearly 90% for acute myocardial infarction. Many cost-effective interventions exist at the individual and population levels, and they are likely to have a significant health impact in Africa. An aggressive approach that combines environmental, policy and legislative interventions for health promotion and primary prevention, coupled with improved access to evaluation, treatment and control of hypertension and other major risk factors, provides the best strategy for averting an epidemic of IHD in sub-Saharan Africa.

Epidemiology of stroke and high blood pressure in Africa.

Stroke and high blood pressure are major causes of death and disability worldwide. Although comprehensive stroke surveillance data for Africa are lacking, the available data show that age-standardised mortality, case fatality and prevalence of disabling stroke in Africa are similar to or higher than those measures in most high-income regions. In Africa, more than 90% of patients with haemorrhagic stroke and more than half with ischaemic stroke are found to have high blood pressure. However, awareness of hypertension and its prevention, treatment and control remain very low in Africa even though recent surveys show an increasing prevalence of the disease consistent with the nutritional and epidemiological transition in the region. Renewed emphasis on improved surveillance and the prevention and control of high blood pressure and stroke in Africa is needed.

Achieving blood pressure goals globally: five core actions for health-care professionals. A worldwide call to action.

The prevalence of hypertension continues to rise across the world, and most patients who receive medical intervention are not adequately treated to goal. A Working Group including representatives of nine international health-care organizations was convened to review the barriers to more effective blood pressure control and propose actions to address them. The group concluded that tackling the global challenge of hypertension will require partnerships among multiple constituencies, including patients, health-care professionals, industry, media, health-care educators, health planners and governments. Additionally, health-care professionals will need to act locally with renewed impetus to improve blood pressure goal rates. The Working Group identified five core actions, which should be rigorously implemented by practitioners and targeted by health systems throughout the world: (1) detect and prevent high blood pressure; (2) assess total cardiovascular risk; (3) form an active partnership with the patient; (4) treat hypertension to goal and (5) create a supportive environment. These actions should be pursued with vigour in accordance with current clinical guidelines, with the details of implementation adapted to the economic and cultural setting.

Law and public health at CDC.

Public health law is an emerging field in U.S. public health practice. The 20th century proved the indispensability of law to public health, as demonstrated by the contribution of law to each of the century's 10 great public health achievements. Former CDC Director Dr. William Foege has suggested that law, along with epidemiology, is an essential tool in public health practice. Public health laws are any laws that have important consequences for the health of defined populations. They derive from federal and state constitutions; statutes, and other legislative enactments; agency rules and regulations; judicial rulings and case law; and policies of public bodies. Government agencies that apply public health laws include agencies officially designated as "public health agencies," as well as health-care, environmental protection, education, and law enforcement agencies, among others.