A village-based programme of presumptive treatment of fever, using voluntary village aides to dispense oral chloroquine or amodiaquine, was established in 1982 by the Papua New Guinea Institute of Medical Research (PNG IMR) in 35 rural villages or hamlets near Madang, on the north coast of PNG. In the course ...

As part of a multi-disciplinary malaria research programme in a rural area of Madang Province, the Papua New Guinea Institute of Medical Research (PNG IMR) in 1982 established a village-based intervention programme of presumptive treatment of fever in 35 villages (population about 5,200). Seventy-four villages aides, selected by people from ...

The feet of three two-humped camels (Camelus bactrianus), one lama (Lama glama) and four alpacas (Lama pacos) from zoos and a circus in the Netherlands were examined for the mange-mite Choroptes bovis. Mites were found on two of the camels, the lama, and three of the alpacas. On one camel ...

During the past few years a great deal has been learnt about malaria parasites and the immune responses that they evoke in their hosts. However, this new knowledge has so far had little impact on the practical problems of malaria control in tropical developing countries where malaria is still responsible ...

Some of the problems connected with Gayadasa and his activity as a commentator are discussed, as well as the date to which he can be assigned.

The bundle of actin filaments in the sperm of the horseshoe crab has a polygonal form. This appearance results from regularly spaced, sharp bends (elbows) separated by straight segments (arms). We conclude that the elbows are built into the bundle by a rearrangement of interfilament crossbridges in the arms. The ...

The most important units of the malaria vectorial system in tropical Africa are included in the Linnaean taxon Anopheles gambiae, which has been split into six sibling species recognized by the application of genetic techniques. More recent studies have shown further complexities involving chromosomal inversion polymorphism in some vector populations ...

General practitioner trainees from the period 1963-80 were followed up with a postal questionnaire, yielding a 62 per cent response rate. Questions were asked about their training and their current posts. Of the ex-trainees, 62 per cent were graduates from overseas medical schools, 92 per cent were now general practitioner ...

A 15-month longitudinal survey was carried out to examine entomological and parasitological aspects of human malaria transmission in Pikine, a city located in the Sudan savanna zone on the Cap Vert peninsula in the west of Senegal. The anopheline population was sampled twice weekly indoors by night human bait capture. ...

This study was carried out to determine the importance of small field irrigation canals (abu eshreens)-of which there are over 22 000 in the Gezira Scheme- in the transmission of schistosomiasis. The observations were made during a 12-month period, November 1976-November 1977. The results indicated that during the 4-year crop ...

This report describes the measures being applied to control malaria in China and outlines the present situation in the country. In the 1940s, it was estimated that approximately 350 million people were at risk of infection and that about 30 million cases of malaria occurred annually. In the last 30 ...

The entomological inoculation rate is presented as a comprehensive indicator of malaria transmission level, its relative changes reflecting the risk of potential epidemic development. This rate is a known function of several epidemiological direct factors and is particularly sensitive to the survival rate and the sporogonic cycle of the vector. ...

Recurrent pouch problems led to the development of a recessed chest wall pacemaker pocket. Segments of the seventh and eighth ribs were resected in the mid-axillary line resulting in a "tailor-made" space suitable for generator implantation. Follow-up at one year has proven the chest wall to be a satisfactory alternative ...

The population of the sugar estates of the Guyana coastlands was 110 000 in 1966; malaria was eradicated between 1945 and 1951. A study has been made of the pattern of mortality before and after malaria eradication, during the 30-year period from 1937 to 1966.The decline in general mortality has ...

Selective extraction and morphological evidence indicate that the phycobiliproteins in three Cryptophyceaen algae (Chroomonas, Rhodomonas, and Cryptomonas) are contained within intrathylakoidal spaces and are not on the stromal side of the lamellae as in the red and blue-green algae. Furthermore, no discrete phycobilisome-type aggregates have thus far been observed in ...

This is a personal account of my brief time in Burundi as a volunteer doctor with Médecins Sans Frontières (MSF) at the beginning of 2001. Burundi is a small nation in central Africa (bounded by the Democratic Republic of Congo, Rwanda and Tanzania) which has suffered from problems between the ...

Population movements of various kinds are among the outstanding demographic features of the African continent and entail serious difficulties for malaria eradication. The majority of these movements are free and uncontrolled and are frequently inter-territorial in nature, hampering nation-wide or more limited malaria eradication projects and resulting in much reinfection.The ...

With an increasing number of malaria eradication programmes approaching or entering the consolidation phase, the epidemiological features of disappearing malaria are getting better known and defined. At the same time, the old classical methods of measuring malaria prevalence have become inadequate and new methods for the epidemiological assessment of the ...

Whereas laboratory investigations have elucidated the mechanism of sorption of residual insecticides and demonstrated that their persistency is determined by a number of physico-chemical factors and is therefore theoretically calculable, the variables encountered in the field may produce results in apparent conflict with those theoretically expected. Attempts to enhance persistency ...

Studies of the exophily exhibited by anophelines in a humid coastal area and in an arid inland region of Tanganyika gave very different results. In the former area, catches of A. gambiae were scanty and largely composed of unfed and gravid females, while in the latter, large numbers of mosquitos ...

An attempt is made to describe the comparative epidemiology of malaria in representative communities of south-western and north-western Nigeria. The climates of the two areas are contrasted and their influence on the seasonal densities and infectivities of the local vectors, Anopheles gambiae and A. funestus, is shown. Malaria occurs in ...

There were a great many problems at Hog Island and the mosquitoes formed one of no mean magnitude. What Dr. Royer and Mr. Emerson have done is given in considerable detail because the paper tells other men in other malarial districts what can be done; how to organize and how ...