World Health Organization fact sheet. Tuberculosis.
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The World Health Organization's (WHO's) nearly half century amelioration of suffering stands as a singular achievement in international cooperation. But after 45 years, the Organization has grown into a complex bureaucracy with an outdated organizational structure. A multidisciplinary framework, which emphasizes organizational theory, yields some insights into these problems. Using this approach, this paper examines the structure, culture, mission, and rules of WHO, and adds a perspective, not otherwise found in the literature, to the growing debate on the future of the Organization. Previous studies of international organizations have explained their behavior as the consequence of the dominant external interests of powerful members. This perspective suggests that organizations like WHO have fewer options and less control of their policies and output. By contrast, there has been very little analysis explaining how international organizations function internally. This paper refutes an exclusively external perspective and shows that the internal organization is also important to understanding WHO. Several conclusions are drawn from this perspective. WHO's organizational myths, as a politically neutral technical agency staffed with uniquely qualified staff, need to be validated and enhanced to attract funding. A new organizational structure, based on an 'open systems' model, is proposed. This strategy would strengthen the WHO Representative Country Offices, redefine staff objectives, close the Regional Offices, and establish open, public elections of the Director General. Traditional WHO culture should only be used for health problems that are well matched to WHO's critical tasks. For more complex social and economic issues, newer, often non-medical, approaches are needed. The internal and external rules, which shape the incentives of WHO staff and leaders, need to be realigned to close the gap between WHO's myths and its day to day work. In the short run it is possible for WHO to do more with its limited budget if it changes its organizational structure; in the long run a reorganized WHO will be able to garner more funding and attract wider international participation.
The World Health Organization (WHO) publishes classification handbooks for all neoplastic diseases. The last WHO Classification of leukemias and lymphomas was published in 1976. Since that time, through cytogenetics and molecular biology, it has been shown that many hematopoietic neoplasms are associated with a unique genetic profile. Similarly, the development of widely available and routinely applied monoclonal antibodies has allowed the identification of a unique immunophenotypic profile for most leukemias and lymphomas. These techniques have permitted the recognition of a number of distinct disease entities, and also enhance both diagnostic accuracy and reproducibility. The WHO Classification has been developed under the joint auspices of the European Association for Hematopathology (EAHP) and the Society for Hematopathology (SH). First organized in 1995, the Steering Committee appointed 10 committees covering T-cell and B-cell lymphomas and leukemias, myeloid and histiocytic tumors. The committees were asked to develop a list of diseases within their topic area, and to establish definitions of each disease according to established criteria. The WHO Classification uses the principles of the R.E.A.L. Classification, which defines each disease according to its morphology, immunophenotype, genetic features, postulated normal counterpart, and clinical features. Morphologic and clinical variants of individual diseases are discussed in the text, and their use is optional. The proposed classification was presented at the USCAP meeting in 1997, the site of the first joint meeting of the EAHP and SH. The presentation was followed by an open forum attended by EAHP and SH members. The Steering Committee also appointed a Clinical Advisory Committee to ensure that the classification meets clinical needs, and to resolve questions of clinical significance. The proposed WHO Classification for lymphomas is similar to the R.E.A.L. Classification for lymphomas, with minor modifications and reassessment of provisional categories based on new data since 1994.
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The World Health Organization (WHO) MONICA Project is a 10-year study monitoring trends and determinants of cardiovascular disease in geographically defined populations. Data were collected from over 100,000 randomly selected participants in two risk factor surveys conducted approximately 5 years apart in 38 populations using standardized protocols. The net effects of changes in the risk factor levels were estimated using risk scores derived from longitudinal studies in the Nordic countries. The prevalence of cigarette smoking decreased among men in most populations, but the trends for women varied. The prevalence of hypertension declined in two-thirds of the populations. Changes in the prevalence of raised total cholesterol were small but highly correlated between the genders (r = 0.8). The prevalence of obesity increased in three-quarters of the populations for men and in more than half of the populations for women. In almost half of the populations there were statistically significant declines in the estimated coronary risk for both men and women, although for Beijing the risk score increased significantly for both genders. The net effect of the changes in the risk factor levels in the 1980s in most of the study populations of the WHO MONICA Project is that the rates of coronary disease are predicted to decline in the 1990s.
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We measured the burden caused by Parkinson's disease (PD) in Spain during the year 2000 and compared it against PD burden worldwide and in the European A subregion. Burden of disease (BoD) is an important factor in health policy. Disability-adjusted life years (DALY) as a measure of BoD is the result of adding years of life lost (YLL) and years lived with disability (YLD). The burden of PD (BPD) has not been studied in Spain. YLL were obtained from the Spanish death certificates and YLD from the estimated number of incident PD cases and the average PD duration. PD disability was calculated, using the Disability Weights for Diseases in the Netherlands. Prior PD DALY data for Europe and the world were obtained from the 2001 World Health Organization World Health Report. A discount rate of 3% and age-weighting modulation factor with K = 1 were used. In Spain, PD generated 67,582 DALY, comprising 6,351 (9.4%) YLL and 61,231 (90.6%) YLD. Most PD DALY (57.5%) occurred in the population 60 to 74 years of age. When PD DALY estimates were adjusted using the world population in 2000, Spain registered a PD DALY rate of 84 per 100,000 population, higher than both the world and European A subregion rates (24 and 35 per 100,000 population, respectively). PD burden in Spain in 2000 was high, with disability being the major contributing factor. Although BPD in Spain was greater than both world and European A subregion BPD, these differences should nevertheless be interpreted with caution.
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OBJECTIVE: This study explored the relationship between the histologic subtype of thymoma according to the new World Health Organization histologic classification and the clinical findings, as well as the prognostic significance of the classification. METHODS: A total of 130 patients with thymoma, who underwent resection at the National Cancer Center Hospital, Tokyo, from 1962 to 2000, were studied retrospectively. The histologic subtype of thymoma was determined according to the new World Health Organization histologic classification. The stage was also determined according to a modified Masaoka's classification as stage I, II, III, IVa, or IVb. To determine the factors that may affect the prognosis of thymoma, a multivariate analysis with Cox's proportional hazards regression model was performed. RESULTS: The distribution of histologic subtype was type A (n = 18), type AB (n = 56), type B1 (n = 15), type B2 (n = 29), and type B3 (n = 12). A close correlation was seen between the histologic subtype and stage (P =.000). The overall survivals at 5 and 10 years were 92% and 91%, respectively. The 5- and 10-year survivals according to stage were 100% and 100% (stage I, n = 40; stage II, n = 54), 81% and 76% (stage III, n = 25), and 47% and 47% (stage IV, n = 11), respectively. The difference in survival between stage III and stage IV was significant (P =.000). Patients with type A or AB thymoma demonstrated a 100% survival at both 5 and 10 years. Recurrences were seen in 12 patients with complete resection. According to a multivariate analysis, tumor size (P =.001), completeness of resection (P =.002), histologic subtype (P =.011), and stage (P =.00) were significant prognostic factors. CONCLUSION: The World Health Organization histologic classification significantly correlated with the clinical stage. Tumor size, completeness of resection, histologic subtype, and stage predicted the prognosis of thymoma.
These guidelines represent an application of the World Health Organization European Region's manual for the laboratory diagnosis of diphtheria for laboratories in the United Kingdom (UK), but they could be applied to laboratories overseas. The manual was rewritten in response to the re-emergence of diphtheria in eastern Europe and the emergence of other infections caused by Corynebacterium diphtheriae and C. ulcerans in the UK and overseas. The guidelines summarise our current recommendations and procedures for the microbiological diagnosis of infections caused by toxigenic and non-toxigenic isolates of corynebacteria, with particular reference to C. diphtheriae and C. ulcerans.
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The aim of this study was to correlate nuclear morphometric features with animal and human World Health Organization International Histological Classifications in canine seminomas. Twenty-three canine seminomas were classified, according to Animal World Health Organization International Histological Classification as intratubular, intratubular with signs of invasion, or diffuse and according to Human World Health Organization International Histological Classification criteria as spermatocytic and typical. The morphonuclear characteristics of tumors were quantitatively evaluated by means of digital cell image analyses of hematoxylin and eosin-stained nuclei. In particular, the mean nuclear area, mean nuclear perimeter, mean nuclear form factor, and their respective standard deviations were calculated. The relationship between the different variables and the tumor histologic types was assessed. On the basis of animal and human classification systems, statistically significant differences were observed only between intratubular seminomas with signs of invasion and the other two types and between spermatocytic and typical seminomas, respectively. In humans, it is well known that typical seminomas are more common and aggressive than spermatocytic ones. In our study, the canine seminomas classified as typical showed significantly larger and more variable nuclear area and perimeter than spermatocytic seminomas. These results support the opinion that most canine seminomas correspond to human spermatocytic seminomas and could explain the benign behavior of canine seminomas, which derive from a more differentiated type of germ cell.
OBJECTIVE: To assess whether ovarian volume of World Health Organization II anovulatory patients in the early follicular phase predicts the response to ovulation induction with gonadotropins. DESIGN: Retrospective data analysis of two prospective, randomized, multicenter studies. SETTING: Clinical development unit of biotechnology company. PATIENT(S): Four hundred sixty-five World Health Organization II anovulatory patients undergoing ovulation induction. MAIN OUTCOME MEASURE(S): Ovarian response to stimulation, ovulation (mid-luteal serum progesterone > 30 nmol/L), cancellation rate, pregnancy rate, and incidence of the ovarian hyperstimulation syndrome (OHSS) according to baseline ovarian volume (day 2-5) before stimulation. RESULT(S): Mean ovarian volume was 11.55 +/- 6.0 cm(3) (range, 0.8-49.3 cm(3)). Small ovarian volume was associated with lower rates of cycle cancellation owing to risk for OHSS (3 vs. 29 patients [2.8% vs. 9%]). Patients with small ovarian volume (<7.25 cm(3)) required fewer ampules of FSH (1373 IU vs. 1629 IU) and shorter duration of stimulation (16 vs. 18.1 days) and had higher ovulation rate than did patients with mid-range and larger ovarian volume (84.3% vs. 69.1% and 68.8%, respectively). The clinical pregnancy rate per cycle of hCG administration was similar in the three groups (25.8%, 28.1%, and 27.5%). CONCLUSIONS: World Health Organization II anovulatory women with medium-sized or large ovaries who are undergoing low-dose gonadotropin stimulation for ovulation induction may have higher risk for OHSS than do women with small ovaries. Women with small ovaries who meet criteria for administration of hCG respond better to ovulation induction and have a similar likelihood of conceiving compared with women with larger ovaries.
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Contraceptive methods often induce disturbances in vaginal bleeding patterns which are the main reason for women to discontinue method use. Knowledge of these changes is essential for effective counselling and product development and necessitates adequate methods of collection and analysis of vaginal bleeding data. These issues were reviewed by clinicians, medical statisticians and computer analysts during several consultations organized by the World Health Organization Special Programme of Research, Development and Research Training in Human Reproduction and their discussions are summarized in this paper. Recommendations are made on the use of menstrual diary cards for data collection. It is suggested that the analysis of menstrual patterns be based on the reference period method developed by Rodriguez et al. in 1976 to which several modifications in terminology and choice of summary statistics are proposed. While these are presented as the minimum required for the comparability of studies, other points of analysis are identified which need further study, in an attempt to stimulate research in this field by other investigators.