Abstract：
:Measurements of spermatheca diameter and wing length were made on 8 East African mosquito populations comprising Anopheles merus and A. gambiae species A, species B, and the "Bwamba cytotype" (=species D). The results showed that, on average, the spermatheca in species A females is larger than in species B. In each of two Tanzanian localities harbouring sympatric populations of A and B an overlap of 20% was observed between the frequency distributions of spermatheca diameter in this pair of species. In the Bwamba cytotype, spermatheca size resembled that of species A but the wings were longer than in all other populations investigated. A. merus females had a small spermatheca enabling about 50% of individuals to be distinguished from species A and about 30% to be distinguished from species B. The correlation coefficient between the two measurements was positive but low. It was concluded that no taxonomic advantage exists in combining both these features for classifying individual mosquitos. With multiple samples, however, the relationship of mean wing length to mean spermatheca diameter appeared to be characteristic for each member of the complex. It is concluded that with these East African populations of the A. gambiae complex, the measurement of spermatheca size has little value for distinguishing between individual females of the different sibling species.
journal_name
Bull World Health Organjournal_title
Bulletin of the World Health Organizationauthors
White GB,Muniss JNsubject
Has Abstractpub_date
1972-01-01 00:00:00pages
793-9issue
6eissn
0042-9686issn
1564-0604journal_volume
46pub_type
杂志文章abstract：:Cardiovascular diseases are often found to be associated with certain physicochemical characteristics of the environment-namely, the hardness of the water and the types of rock and soil underlying the area. Areas supplied with soft water usually have higher cardiovascular death rates than do areas supplied with hard w...
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：:Described are the results of an international collaborative study to evaluate the use of whole blood samples spotted on filter-paper (BSP) for the detection of antibodies to human immunodeficiency virus type 1 (HIV-1). BSP samples were collected from 40 patients at risk for HIV-1 infection and tested blindly using com...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1992-01-01 00:00:00
abstract：:In a case-control study we examined the association of Plasmodium falciparum circumsporozoite antibodies (anti-R32tet32) with subsequent P. falciparum infections. A study population of 140 children living in an endemic area was followed longitudinally for 25 weeks with weekly blood smears for malaria parasites and, on...
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：:In March 1990 a study was carried out in the village of Kicheba, United Republic of Tanzania, in which the pyrethroid insecticide lambda-cyhalothrin was sprayed on all the internal surfaces of houses and other shelters at a coverage of about 25 mg of active ingredient per m2. Every day for 6 days, 12 spraymen and 3 sq...
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：:This Memorandum summarizes current knowledge on the epidemiology of cholera and diarrhoea due to enterotoxigenic Escherichia coli (ETEC) and outlines the results of recent research to develop an effective oral vaccine against cholera. The meeting reviewed current research on the protective antigens of ETEC and made a ...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1990-01-01 00:00:00
abstract：:In this study the efficacy of oral rehydration solution (ORS) was compared with that of intravenous fluid (IVF) in the treatment of moderate and some severe cases of dehydration due to diarrhea in a treatment center in Bangladesh during 1980-81. 10,379 patients with moderate and severe dehydration in 1980 and 9897 in...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1983-01-01 00:00:00
abstract：Objective:To estimate the use of hospitals for four essential primary care services offered in health centres in low- and middle-income countries and to explore differences in quality between hospitals and health centres. Methods:We extracted data from all demographic and health surveys conducted since 2010 on the typ...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：10.2471/BLT.19.245563
更新日期：2020-11-01 00:00:00
abstract：:Aortic and coronary atherosclerosis and the prevalence of coronary stenosis and thrombosis were studied in subjects who had died of fresh or recurrent myocardial infarction or had suffered from myocardial infarction in the past. In general, severe atherosclerosis of the coronary arteries with stenosis and calcificatio...
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：:There have been 4 waves of imported malaria in the USA. They occurred during the colonization of the country and during the Second World War, the UN Police Action in Korea, and the Viet-Nam conflict. The first 3 episodes are briefly described and the data on imported malaria from Viet-Nam are discussed in detail.Endem...
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：:Two regimens of fluid and electrolyte therapy were studied in children with severe cholera and noncholera diarrhoea. In one, lactated Ringer's solution was the sole intravenous fluid, additional water, glucose, and potassium being given by mouth. In the other, three different intravenous solutions were employed to mee...
journal_title：Bulletin of the World Health Organization
pub_type： 临床试验,杂志文章,随机对照试验
doi：
更新日期：1972-01-01 00:00:00
abstract：PROBLEM:Propanil is an aniline herbicide that is widely used for rice cultivation, but is also used for self-poisoning. Toxicity from propanil is largely due to methemoglobinemia. In resource-poor settings, the capacity to determine methemoglobin concentration is insufficient and prevents effective case management, whi...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：10.2471/BLT.15.158147
更新日期：2016-08-01 00:00:00
abstract：:The dynamics of transmission of disease agents by vectors depends, in part, on the probability of host-vector contact, which can vary with fluctuations of both host and vector. As important as seasonal variations is 24-hour periodicity in activity. Periodicity in the landing of males and females of Aedes aegypti on ma...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1973-05-01 00:00:00
abstract：OBJECTIVE:To develop, in a mortuary setting, a pilot programme for improving the accuracy of records of deaths caused by injury. METHODS:The recording of injury-related deaths was upgraded at the mortuary of the Komfo Anokye Teaching Hospital, Kumasi, Ghana, in 1996 through the creation of a prospectively gathered dat...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：2002-01-01 00:00:00
abstract：:This article provides an overview of the current Chinese health care system with particular emphasis on rural-urban differences. China's post-1978 economic reforms, although they improved general living standards, created some unintended consequences, as evidenced by the disintegration of the rural cooperative medical...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章,评审
doi：
更新日期：1993-01-01 00:00:00
abstract：:In this paper Lassa virus is used as a model in pinpointing priorities for future research on the arenaviruses. Suggestions for specific investigations and public health measures cover the detection of Lassa virus infection, the pathology and therapy of the disease, and its prevention and control. ...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1975-01-01 00:00:00
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 ...
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 maternal and neonatal health services in 49 developing countries. METHODS:The services were rated on a scale of 0 to 100 by 10 - 25 experts in each country. The ratings covered emergency and routine services, including family planning, at health centres and district hospitals, access to these servi...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：2002-01-01 00:00:00
abstract：:Venereal diseases are known to occur most frequently in the age-groups of greatest sexual activity and more frequently among people in certain occupations (e.g., migrant labourers, military personnel and seafarers) than among the general population. The Brussels Agreement of 1924 and the great improvements in conditio...
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：:An outbreak of spastic paraparesis which mostly affected women and children occurred in a northern province of Mozambique in 1981. The epidemic was related to chronic cyanide intoxication associated with a diet consisting almost exclusively of cassava. A prolonged drought in the area had exhausted all food resources e...
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：: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：OBJECTIVE:To estimate post-traumatic stress disorder (PTSD) symptoms in those injured and not injured by landmines or unexploded ordnance (UXO) in rural Lao People's Democratic Republic and to determine whether the perception of social support was associated with PTSD symptom severity. METHODS:A community survey was c...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：10.2471/BLT.12.115311
更新日期：2013-10-01 00:00:00
abstract：OBJECTIVE:To determine if educating caregivers in providing zinc supplements to infants < 6 months old with acute diarrhoea is effective in treating diarrhoea and preventing acute lower respiratory infections (ALRIs), and whether it leads to a decrease in the use of oral rehydration salts (ORS). METHODS:In this retros...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章,随机对照试验
doi：10.2471/BLT.10.075986
更新日期：2010-10-01 00:00:00
abstract：:A new immunodiffusion technique in agarose gel for the quantification of complement-fixing antibodies is described. The test involves the incorporation of antigen and complement in a primary agarose gel. Heat-inactivated serum samples are allowed to diffuse radially from wells overnight at 4 degrees C. A secondary gel...
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：:In a continuing search for more effective molluscicides, tests were carried out in the Egypt-49 area on Molucid and WL 8008. Molucid, a 35% w/v solution of isobutyltriphenyl-methylamine (ICI 24223), was applied at 2 ppm for 6 hours; after the treatment, no live Bulinus truncatus, Biomphalaria alexandrina or Lymnaea ca...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：1966-01-01 00:00:00
abstract：:Simple microplate assay methods for determining the frequency of insecticide resistance in single mosquitos were used to study the distribution and localization of organophosphate and carbamate resistance in field populations of Anopheles albimanus Weidemann in Guatemala, where such resistance, caused by heavy use of ...
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：:Since an excellent candidate strain (M) for live virus vaccination of swine against Japanese encephalitis was developed, a number of large vaccination programmes have been implemented in Japan with the aim of controlling Japanese encephalitis epidemics in man by reducing the population size of nonimmune swine. Encoura...
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：:A field trial was carried out with a vaccine containing 300x10(9) killed S. typhi (strain Ty58) per tablet. A total of 12 564 children aged 1-15 years were given 3 tablets of the vaccine or a placebo at the rate of one tablet on each of 3 consecutive days. The results indicated that the vaccine, in its present form an...
journal_title：Bulletin of the World Health Organization
pub_type： 临床试验,杂志文章
doi：
更新日期：1973-06-01 00:00:00
abstract：:The 1990s have seen a remarkable decrease in mortality among infants and children in most developing countries. In some countries, particularly in sub-Saharan Africa, these declines in mortality among children have slowed and are now increasing again. Internationally comparable data derived from survey programmes, suc...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：
更新日期：2000-01-01 00:00:00
abstract：:Malarial antibody levels were measured by the enzyme-linked immunosorbent assay (ELISA) in two West African populations, one exposed to intense malaria transmission and the other protected. The results reflected the transmission of maternal antibody and, in the unprotected population, the subsequent increase of the EL...
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：OBJECTIVE:To estimate out-of-pocket costs and the incidence of catastrophic health expenditure in people admitted to hospital with acute coronary syndromes in Asia. METHODS:Participants were enrolled between June 2011 and May 2012 into this observational study in China, India, Malaysia, Republic of Korea, Singapore, T...
journal_title：Bulletin of the World Health Organization
pub_type： 杂志文章
doi：10.2471/BLT.15.158303
更新日期：2016-03-01 00:00:00
