Abstract：
:N-Tritylmorpholine (Frescon, WL 8008) is highly toxic to the intermediate-host snails of the Schistosomatidae. Molluscicidal concentrations range from 0.1 ppm to 0.5 ppm for 1-hour exposures and from 0.01 ppm to 0.05 ppm for 24-hour exposures. Under these conditions the compound is not toxic to snail eggs; recent work, however, shows that longer exposures are toxic. It has been successfully used to control snails in large-scale trials in several countries with very short exposures (4 ppm for 15 min), as well as in prolonged treatments (0.025 ppm for 16 days).These treatments have remarkably little effect on other forms of aquatic life; plants, insects and the microfauna and flora are unaffected, and in certain circumstances it has proved possible to control snails without harming fish populations. A detailed study of the toxicology of N-tritylmorpholine in mammals has shown that it does not present any toxic hazards.N-Tritylmorpholine can be formulated in a variety of ways, e.g., as emulsifiable concentrates, water-dispersible powders and granules, as well as some specialized types of formulations, such as baits and spreading oils. Laboratory and field studies have shown that environmental factors such as mud, light and vegetation have little effect on the performance of N-tritylmorpholine, but hydrolysis and loss of activity may occur in acid water.
journal_name
Bull World Health Organjournal_title
Bulletin of the World Health Organizationauthors
Boyce CB,Jones TW,Van Tongeren WAsubject
Has Abstractpub_date
1967-01-01 00:00:00pages
1-11issue
1eissn
0042-9686issn
1564-0604journal_volume
37pub_type
杂志文章abstract：:LATEX/IgM, a rapid agglutination test for the semi-quantitative detection of IgM in cerebrospinal fluid of patients with African trypanosomiasis, is described in this article. The lyophilized reagent has been designed for field use and remains stable at 45 degrees C for one year. The test has been evaluated on cerebro...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1998-01-01 00:00:00
abstract：PROBLEM:In 1999, a tuberculosis (TB) crisis was declared in the Western Pacific Region. APPROACH:In response, WHO established the Stop TB Special Project, which sought to halve 2000 levels of TB prevalence and mortality by 2010 through first reaching the global 2005 TB targets. LOCAL SETTING:Particular issues in the ...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：10.2471/blt.06.038521
更新日期：2007-05-01 00:00:00
abstract：:Now that the global eradication of wild poliovirus is almost within sight, planning for the post-certification era is becoming a priority issue. It is agreed that a stockpile of appropriate polio vaccines will need to be established, and a surveillance and response capacity will need to be maintained, in order to prot...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：2004-01-01 00:00:00
abstract：:The immunological characteristics of 26 strains of Japanese encephalitis virus (JEV) isolated in Japan and Malaya between 1935 and 1966 have been investigated mainly by the antibody-absorption variant of the haemagglutination-inhibition test, and to a certain extent also by conventional haemagglutination-inhibition an...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1968-01-01 00:00:00
abstract：:Hepatic damage caused by chronic exposure to arsenic has been frequently described. Here we report on 13 patients from West Bengal, India, who consumed large amounts of arsenic in drinking water. An epidemiological investigation of the study area showed evidence of chronic arsenical dermatosis and hepatomegaly in 62 (...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1988-01-01 00:00:00
abstract：:This paper describes the organization of an epidemiological survey, carried out by the Lipid Centre of the Institute of Experimental Medicine in Leningrad, particularly the ways in which subjects were recruited. The different methods of recruitment resulted in a total population response of 78.14%. A time index is int...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1981-01-01 00:00:00
abstract：:Catchy music spots and engaging storylines can help to convey important public health messages, but do they improve our health? Gary Humphreys and Fiona Fleck report. ...
journal_title：Bulletin of the World Health Organization
pub_type： 新闻
doi：10.2471/BLT.15.020715
更新日期：2015-07-01 00:00:00
abstract：:This is a classification of tumours of fibrous tissue, fat, muscle, blood and lymph vessels, and mast cells, irrespective of the region of the body in which they arise. Tumours of fibrous tissue are divided into fibroma, fibrosarcoma (including "canine haemangiopericytoma"), other sarcomas, equine sarcoid, and various...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1974-01-01 00:00:00
abstract：:In order to determine the effectiveness of anti-typhoid vaccines in man a controlled field trial, the first of its kind, was organized in 1954-60 in the town and district of Osijek, Yugoslavia. Heat-killed, phenol-preserved and alcohol-killed, alcohol-preserved anti-typhoid monovaccines were used, with phenolized dyse...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1962-01-01 00:00:00
abstract：OBJECTIVE:To assess the value of self-rated health assessments by examining the association between education and self-rated poor health. METHODS:We used the globally representative population-based sample from the 2002 World Health Survey, composed of 219,713 men and women aged 25 and over in 69 countries, to examine...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：10.2471/BLT.09.067058
更新日期：2010-02-01 00:00:00
abstract：:A simple force-of-infection model for onchocerciasis has been developed for a study of the age-specific epidemiological trends during a period of vector control in the Onchocerciasis Control Programme in the Volta River basin area (OCP). The most important factors included in the model are the longevity of an infectio...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1986-01-01 00:00:00
abstract：:A comprehensive field investigation in several parts of India has revealed that the presence of coliforms in drinking water is associated with hydrogen sulfide-producing organisms. This paper describes a simple, rapid, and inexpensive field test for the screening of drinking water for faecal pollution, based on the de...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1982-01-01 00:00:00
abstract：:A taxonomic approach using cluster analysis and principal component analysis has grouped the countries of the world in eight clusters, in an initial attempt to propose a worldwide spatial classification based on the following health-related indicators: (a) those directly related to the health status of the population;...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1989-01-01 00:00:00
abstract：:Dengue haemorrhagic fever/dengue shock syndrome (DHF/DSS) is an enigmatic and growing public health problem which is confined at present to countries of South-East Asia. Since 1956, over 350 000 patients have been hospitalized and nearly 12 000 deaths have been reported. Dengue viruses, a group of four flaviviruses, a...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1980-01-01 00:00:00
abstract：:In November 1999, Dr Amadou Diarra was appointed senior director of Bristol-Myers Squibb's Secure the Future Initiative. Launched 18 months ago, this public-private partnership is seeking, together with the governments of nine African countries, innovative ways of reducing the transmission and the impact of HIV/AIDS, ...
journal_title：Bulletin of the World Health Organization
pub_type： 面试
doi：
更新日期：2001-01-01 00:00:00
abstract：:Little has been written about the survival of filarial mosquitos in nature, although methods are available for determining natural mortality in the field. Every filarial infection in a mosquito provides some information about the number of days it has survived after infection. This can be used to determine the probabi...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1963-01-01 00:00:00
abstract：OBJECTIVE:To determine the fraction of individuals with high total serum cholesterol who get diagnosed and effectively treated in eight high- and middle-income countries. METHODS:Using data from nationally representative health examination surveys conducted in 1998-2007, we studied a probability sample of 79 039 adult...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：10.2471/BLT.10.079947
更新日期：2011-02-01 00:00:00
abstract：:Reported is an enzyme-linked immunosorbent assay (ELISA) that has been optimized and validated for the determination of chloroquine in urine or dried blood spots. The assay employs antisera raised in sheep to a chloroquine derivative conjugated to keyhole limpet haemocyanin and chloroquine conjugated to porcine thyrog...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1988-01-01 00:00:00
abstract：:Vaccines constitute the single most important cost factor in the Expanded Programme on Immunization (EPI) in Mozambique and in view of future new disease-control initiatives, the proportional expenditure on vaccines will only increase. Airfreight may contribute up to at least 25% of the total cost of delivered vaccine...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1997-01-01 00:00:00
abstract：:For 164 days mature chickens received a daily diet containing 40 g of wheat treated with organomercurial fungicide and 80 g of untreated diet. A control group received 120 g of normal diet daily. The experimental group was then split - half receiving the same diet for a further 155 days, by which time all had been kil...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1976-01-01 00:00:00
abstract：OBJECTIVE:To understand better the current regional situation and public health response to cervical cancer and female breast cancer in the Americas. METHODS:Data on cervical cancer and female breast cancers in 33 countries, for the period from 2000 to the last year with available data, were extracted from the Pan Ame...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：10.2471/BLT.12.116699
更新日期：2013-09-01 00:00:00
abstract：:In May 1963 a live vaccine prepared from streptomycin-dependent Shigella flexneri 2a was administered to 355 soldiers stationed in an area of Yugoslavia in which bacillary dysentery was hyperendemic. Five oral doses were given every third day. 382 unvaccinated soldiers from the same unit served as controls. Both group...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1965-01-01 00:00:00
abstract：:The author examines in detail the symptomatology, diagnosis, and treatment of plague, and outlines the problem of the length of the incubation period.The clinical features commonly met with in all severely-affected plague patients, regardless of the primary localization of the infection, are described. The author then...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1953-01-01 00:00:00
abstract：OBJECTIVE:To investigate the impact of violence against mothers on mortality risks for their offspring before 5 years of age in Nicaragua. METHODS:From a demographic database covering a random sample of urban and rural households in Le n, Nicaragua, we identified all live births among women aged 15-49 years. Cases wer...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：2003-01-01 00:00:00
abstract：:Reported are the results of a randomized, double-masked, placebo-controlled trial of annual ivermectin dosing in 34 rural communities, Kaduna State, northern Nigeria, where guinea savanna onchocerciasis is mesoendemic. A total of 939 individuals underwent Friedmann field analysis at the first examination and saw at le...
journal_title：Bulletin of the World Health Organization
pub_type： 临床试验,杂志文章,多中心研究,随机对照试验
doi：
更新日期：1997-01-01 00:00:00
abstract：:Measurements of child growth have become the most accepted means of assessing the protein-calorie nutritional status of economically developing populations. International reference standards have been suggested for a number of body measurements, but there has been little evaluation of their applicability in South-East...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1971-01-01 00:00:00
abstract：:Reported are the results of a study to investigate the immunogenicity of oral poliovirus vaccine (OPV) when administered in mass campaigns compared with that following routine immunization programmes. For this purpose, paired sera were collected from a cohort of children before and after a mass vaccination with OPV in...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1995-01-01 00:00:00
abstract：:Schistosoma mansoni and Schistosoma haematobium are widely distributed throughout East Africa, each being transmitted by several intermediate hosts. It is feared that the increased use of irrigation, which is proposed in Tanganyika to expand agricultural productivity, will also increase the incidence and intensity of ...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1965-01-01 00:00:00
abstract：:Airport and aviation authorities are starting to recognize that airports do not have to be unhealthy. Sima Barmania reports. ...
journal_title：Bulletin of the World Health Organization
pub_type： 新闻
doi：10.2471/BLT.18.020818
更新日期：2018-08-01 00:00:00
abstract：OBJECTIVE:Literature on human resources for health in Africa has focused on personal health services. Little is known about graduate public health education. This paper maps "advanced" public health education in Africa. Public health includes all professionals needed to manage and optimize health systems and the public...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：10.2471/blt.07.045526
更新日期：2007-12-01 00:00:00
