Abstract：
:Water velocity is an important physical factor in the conditioning of streams and canals as habitats for the intermediate snail host of bilharziasis. Ecologists in most of the bilharziasis endemic areas have studied the resistance of these molluscs to the disturbing action of water motion. However, the complex nature of water flow through natural and man-made courses makes it very difficult to determine accurately the limiting range of water velocity that allows the settlement and development of snail colonies in a watercourse, and results are therefore still inconclusive.This paper describes the procedure employed in and the results obtained from a study designed to elucidate the water flow phenomenon through analysis of the relative variations of water velocity at any point of the cross-section of the canal. From this study it was possible to derive a simplified method for measuring the rate of water flow in earth canals that may be of wide application in snail control by the use of molluscicides.
journal_name
Bull World Health Organjournal_title
Bulletin of the World Health Organizationauthors
DE ARAOZ Jsubject
Has Abstractpub_date
1962-01-01 00:00:00pages
99-123eissn
0042-9686issn
1564-0604journal_volume
27pub_type
杂志文章abstract：:Tuberculosis (TB) is a major public health problem in eastern Europe. Since 1990, the incidence rates of TB have continued to increase in Belarus, the Russian Federation, the Ukraine and the central Asian republics of Kazakhstan, Kyrgyzstan, Tajikistan and Uzbekistan. Eastern Europe, and in particular the Russian Fede...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章,评审
doi：10.2471/blt.06.034991
更新日期：2008-02-01 00:00:00
abstract：:A method of assessing "atherosclerosis", if used according to certain rules, was shown in an earlier study to be capable of discriminating between groups of aortas or coronary arteries according to the quantity of certain defined lesions. It would not measure absolute amounts, but would show whether one group of speci...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1964-01-01 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：OBJECTIVES:To determine the extent to which families follow referral and follow-up recommendations given in accordance with the Integrated Management of Childhood Illnesses (IMCI) strategy and the factors that influence families' responses to such recommendations. METHODS:Children aged 2 months-5 years who presented t...
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：:This literature review indicates that menstrual regulation during the fifth to seventh week of pregnancy is not always as free from risk as has sometimes been claimed. In particular, it has a higher failure rate, in terms of continued pregnancy, than has abortion by suction in later stages of pregnancy.Vacuum aspirati...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1979-01-01 00:00:00
abstract：:Strains of Vibrio cholerae-1156 from various parts of the world-were examined by standardized antibiotic sensitivity tests in one centre, to determine the global incidence of antibiotic resistance in this organism and to assess the extent to which differences in methods of sensitivity testing might be responsible for ...
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 assess cash transfer interventions for improving treatment outcomes of active pulmonary tuberculosis in low- and middle-income countries. Methods:We searched PubMed®, Embase®, Cochrane Library and ClinicalTrials.gov for studies published until 4 August 2017 that reported on cash transfer interventions dur...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章,meta分析,评审
doi：10.2471/BLT.18.208959
更新日期：2018-07-01 00:00:00
abstract：:Freeze-fracture studies were made on the parasite and the erythrocyte in P. knowlesi infections. There is a loss of transmembrane integral proteins from the plasma membrane of the schizont-infected erythrocyte and the intraerythrocytic parasite synthesizes new transmembrane proteins as development proceeds. Formation ...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1977-01-01 00:00:00
abstract：:The gene for dieldrin resistance has been artificially male-linked so that females can be selectively killed with dieldrin. By intercrossing different sibling species of the Anopheles gambiae complex, batches consisting of sterile males only can be reared. This seems to have potential for use in genetic control operat...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1978-01-01 00:00:00
abstract：:Doubts have been raised on theoretical grounds concerning the effect of BCG in tropical countries, where in most places a large proportion of the population have a naturally acquired tuberculin allergy of low strength and unknown (but almost certainly non-specific) origin. Furthermore, vaccinations in the tropics may ...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1964-01-01 00:00:00
abstract：:Three experiments were carried out in field cages to test the principle of "transport" of a desirable gene or chromosome into a wild Culex fatigans population as a result of the sterility in cross-matings associated with cytoplasmic incompatibility. Cycling populations of Delhi origin were established in the cages and...
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：:This paper describes the research conducted by a WHO collaborative study group for the development of a questionnaire method for the assessment of quality in child-care settings. The results of an inter-rater reliability study undertaken in Greece and Nigeria suggest that the Child Care Facility Schedule (CCFS), compo...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1991-01-01 00:00:00
abstract：:Viruses of various biological types are known to cause a wide range of acute respiratory infections, ranging from mild colds and catarrh to severe bronchiolitis and pneumonia. Bacteria also cause respiratory diseases including serious conditions such as otitis media and pneumonia. The whole situation is complex and to...
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：:Enzyme immunoassays represent in many cases the preferred procedure for the detection of antigens or corresponding antibodies. However, many of the current procedures are performed suboptimally. This article reviews the available designs, auxiliary recognition systems, production and purification of antibodies, conjug...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章,评审
doi：
更新日期：1985-01-01 00:00:00
abstract：:Hospital- and community-based studies were conducted in central Sudan to investigate the association between pesticide exposure and perinatal mortality. The cases were 197 stillbirths in the hospital and 36 perinatal deaths in the community; the controls were 812 liveborn, normal-birth-weight infants in the hospital, ...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1993-01-01 00:00:00
abstract：:This paper is an attempt to relate modifications observed in general and infant mortality rates with the dynamic changes in transmission induced by malaria control measures. The observations indicated relationships between the efficacy of control and a decrease in mortality. The daily parasitological inoculation rate ...
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：:Teguest Guerma talks to Gary Humphreys about her career in public health, and her commitment to training midwives in Ethiopia. ...
journal_title：Bulletin of the World Health Organization
pub_type： 传,历史文章,面试,新闻
doi：10.2471/BLT.19.030919
更新日期：2019-09-01 00:00:00
abstract：:Of 10 000 compounds tested for tissue schizontocidal activity in a Plasmodium gallinaceum-chick model, 157 were also tested in a definitive mouse test (DMT) and 277 in a rhesus monkey test (RMT). The results in the avian model were 78% and 55% in agreement with those of the DMT and RMT, respectively. This result is no...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1985-01-01 00:00:00
abstract：:As in an earlier study, the authors have endeavoured to review the world incidence of poliomyelitis on the basis of the available statistical information (official notifications of cases and deaths) and to compare these data with data received from various sources regarding the prevailing viruses.It is certainly not y...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1956-01-01 00:00:00
abstract：:Until very recently, rabies research had made few notable advances since the time of Pasteur, but during the past few years the use of modern virological techniques has led to rapid progress in research on the rabies virus. This article summarizes the present state of knowledge of pathogenesis, immunology, cultivation...
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：:Between April and July 1966 a comparative trial of two live attenuated measles vaccines (Schwarz and Beckenham 31), given intramuscularly or intradermally, was conducted in Hong Kong. Some 910 non-immune children completed the trial. The Beckenham 31 vaccine caused significantly more complications than Schwarz vaccine...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1967-01-01 00:00:00
abstract：:Metrifonate, an organophosphorus compound, caused a decline in the number of microfilariae in domestic cats experimentally infected with Brugia pahangi. It was found that the drug was active against both microfilariae and macrofilariae, but probably its greatest effect was on the macrofilarial stages. It is suggested ...
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：OBJECTIVE:To estimate incidence of shigellosis in the Kaengkhoi district, Saraburi Province, Thailand. METHODS:Population-based surveillance of shigellosis based in treatment centres. The detected rates of treated shigellosis were corrected for the number of cases missed due to the low sensitivity of microbiological c...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：/S0042-96862005001000010
更新日期：2005-10-01 00:00:00
abstract：:Poxviruses were isolated from the kidneys of an outwardly healthy chimpanzee trapped in an area of the Democratic Republic of the Congo where a case of monkeypox had recently occurred in man, from the kidneys of clinically healthy cynomolgus monkeys in a colony in the Netherlands, and from monkeys suffering from monke...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1972-01-01 00:00:00
abstract：:Present methods of controlling meningococcal cerebrospinal meningitis have failed to contain the disease. This has led to the search for effective vaccines and to the development of methods for assaying the potency of these vaccines, as well as for measuring the immune response of the individual. The feasibility of us...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1969-01-01 00:00:00
abstract：:Health financing is a complex health system function, which cannot be analysed accurately without tracking each step of the flow of funds separately. We analysed the revenue mix of the Hungarian health insurance fund from 1994 to 2015 and discuss the policy implications of our findings. We used the System of Health Ac...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：10.2471/BLT.18.218982
更新日期：2019-05-01 00:00:00
abstract：OBJECTIVE:To determine the extent to which the community-directed approach used in onchocerciasis control in Africa could effectively and efficiently provide integrated delivery of other health interventions. METHODS:A three-year experimental study was undertaken in 35 health districts from 2005 to 2007 in seven resea...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章,多中心研究,随机对照试验
doi：10.2471/BLT.09.069203
更新日期：2010-07-01 00:00:00
abstract：:In the course of a research project on atherosclerosis, an international group of pathologists studied lesions in the aorta and coronary arteries obtained at autopsy from 3174 subjects from Czechoslovakia, Sweden and the USSR in an effort to determine what factors, recognizable in life, might be used to predict the pr...
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 total cost of the Expanded Programme on Immunization and of its various components in the Gambia over a period of one year (from July 1980 to June 1981) was investigated, and the costs per immunization dose and per fully immunized child were calculated. The total costs were to a large extent (45%) due to the cost ...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1984-01-01 00:00:00
abstract：:Women's chances of survival during pregnancy and childbirth have greatly improved in Nepal. Sophie Cousins reports. ...
journal_title：Bulletin of the World Health Organization
pub_type： 新闻
doi：10.2471/BLT.16.030516
更新日期：2016-05-01 00:00:00
