Your search
Results 690 resources
-
2876 persons in fourteen communities in the Taraba River Valley, Nigeria were examined for eye lesions and tested for visual acuity using the ‘tumbling E’. The individuals were also examined for microfilaria of Onchocerca volvulus. More than one-tenth of the population were blind, while another 16.1% had visual impairment. The prevalence of blindness was in excess of 20% in six communities, with one community recording 71.9% blindness rate. All forms of visual involvement increased with age...
-
Tobacco smoking is fast becoming a public health problem in Ghana and the youth are at a greater risk of becoming victims of it. A survey of nine secondary (high) schools in the Greater Accra Region of Ghana showed that 31.1% of students have smoked before and that 10.3% smoke cigarettes regularly. A significant number of those who had ever smoked (32.6%) came from high socio-economic homes as exemplified by the level of education of the father. Advertising appears to be a factor as to why...
-
Before implementation of multidrug therapy (MDT), leprosy patients who were clinically inactive, skin-smear negative and had been treated with dapsone monotherapy for at least 5 years (paucibacillary patients) or for at least 10 years (multibacillary patients) were released from treatment. An analysis was made of self-reporting relapses in 1081 paucibacillary (PB) patients and 1123 multibacillary (MB) patients who had been released in Addis Ababa and two rural districts of the leprosy...
-
This paper reports on reactions in leprosy patients who were treated with multidrug therapy (MDT) in the leprosy control program of the All Africa Leprosy and Rehabilitation Training Center (ALERT) in Ethiopia. Only those reactions which occurred in patients who had not been treated with dapsone before MDT and which required treatment with prednisolone were included. Until the end of the second year of MDT a reversal reaction had been diagnosed in 43.6% of 266 borderline lepromatous (BL)...
-
The purpose of this study was to determine the oral health habits and periodontal health among a group of university students in Kenya. The study comprised 243 randomly selected first year students, mean age 23 years, at the University of Nairobi. Questionnaire response showed that 39% of the participants had visited a dentist before, mainly for extraction. Sixteen per cent said they visited a dentist at least once a year and 96% said they brushed daily. Clinical examination was done in a...
-
Abstract Rainfall is the most important water resource in central and western Sudan, a region affected by the recent drought in Africa. A general methodology for studying the annual rainfall process is presented and applied to data from central and western Sudan. It is assumed that certain time series models adequately describe the annual rainfall process in the region. Based on this assumption, the drought frequencies are calculated in the subregions with stationary series. The theory of...
-
Extensive drought in the 1970s and 1980s prompted national and international development efforts aimed at the pastoralist populations of Marsabit District of Kenya. Famine relief efforts by the Catholic Church and the African Inland Mission contributed to the settling of former nomads and the growth of small towns, while international development efforts, including UNESCO's Integrated Project in Arid Lands (IPAL) focused on range conservation and the improvement of livestock marketing. The...
-
Transition from collisional to extensional tectonics in eastern Papua New Guinea (PNG) is reflected in cessation of arc-type volcanism and eruption of rifting-related transitional basalts. Pb, Sr and Nd isotopic compositions for 28 samples representing these volcanic suites and subordinate high-K trachytes of unknown origin reflect melting and mixing of three distinct magma sources. The arc volcanics have high La/Nb, low Ce/Pb and overabundances of LILE relative to the LREE consistent with...
-
It is obvious that there is a great need for small business and self-employment in both developed and developing countries. This article looks at the situation in South Africa, in particular, where there is an urgency to create a good environment for potential entrepreneurship among the black communities, and suggests change, using the experiences of programmes in the UK. Two placement and training programmes are analysed for their potential in raising student awareness of small business,...
-
40Ar39Ar step-heating analyses have been carried out on domatiites and komatiitic basalts from the Komati Formation, the uppermost formation of the Tjakastad Subgroup in the Barberton Greenstone Belt. The results for the komatiites fall into two groups, which have integrated ages either greater than 3.3 Ga or less than 3.0 Ga. The most precise plateau ages in the first group correspond to an age of ∼3.49 Ga, which we take to be the age of metamorphism since the whole rocks analysed are...
-
According to Piaget, cognitive development can be realized with maturation and environmental experience, but he attached some significance to training as a means of facilitating cognitive development. This paper gives brief summaries of eight studies carried out in Africa clearly showing that cognitive development can be facilitated by training.