Nigerian secondary school students are becoming sexually active at an increasing earlier age. Sexually active students are at risk of contacting STDs, including HIV infection. As a result, health education initiatives to increase level of knowledge, influence attitudes and encourage safe sexual practices are being implemented in schools, but the effectiveness of these programmes have not been evaluated. In this study, the knowledge, attitude and sexual risk behaviors of 223 students who received a comprehensive health education intervention were compared with 217 controls. At post-test, intervention students exhibited greater knowledge about HIV/AIDS transmission and prevention (P < 0.05). Intervention students were less likely to feel AIDS is a white man's disease and were more likely to be tolerant of people living with the disease (P < 0.05). After the intervention, the mean number of reported sexual partners among the experimental students significantly decreased from 1.51 to 1.06, while it increased from 1.3 to 1.39 among the controls. Among the intervention students there was also an increase in consistent use of the condom and the use of the condom at last sexual intercourse. We conclude that students can benefit from specific education programmes that transmit important information necessary to prevent risky behavior, and improve knowledge and attitudes on HIV/AIDS.

An attempt was made to assess the true public-health importance of onchocercal skin disease throughout the African region and hence provide an objective basis for the rational planning of onchocerciasis control in the area. The seven collaborative centres that participated in the study (three in Nigeria and one each in Ghana, Cameroon, Tanzania and Uganda) were all in areas of rainforest or savannah-forest mosaic where onchocercal blindness is not common. A cross-sectional dermatological survey was undertaken at each site following a standard protocol. At each site, the aim was to examine at least 750 individuals aged 5 years and living in highly endemic communities and 220-250 individuals aged 5 years and living in a hypo-endemic (control) community. Overall, there were 5459 and 1451 subjects from hyper-and hypo-endemic communities, respectively. In the highly endemic communities, the prevalence of itching increased with age until 20 years and then plateaued, affecting 42% of the population aged 20 years. There was a strong correlation between the prevalence of itching and the level of endemicity (as measured by the prevalence of nodules; r=0.75; P<0.001). The results of a multivariate logistic regression analysis showed that, at the individual level, the presence of onchocercal reactive skin lesions (acute papular onchodermatitis, chronic papular onchodermatitis and/or lichenified onchodermatitis) was the most important risk factor for pruritus, with an odds ratio (OR) of 18.3 and 95% confidence interval (CI) of 15.19-22.04, followed by the presence of palpable onchocercal nodules (OR=4.63; CI=4.05-5.29). In contrast, non-onchocercal skin disease contributed very little to pruritus in the study communities (OR=1.29; CI=1.1-1.51). Onchocercal skin lesions affected 28% of the population in the endemic villages. The commonest type was chronic papular onchodermatitis (13%), followed by depigmentation (10%) and acute papular onchodermatitis (7%). The highest correlation with endemicity was seen for the prevalence of any onchocercal skin lesion and/or pruritus combined (r=0.8; P<0.001). Cutaneous onchocerciasis was found to be a common problem in many endemic areas in Africa which do not have high levels of onchocercal blindness. These findings, together with recent observations that onchocercal skin disease can have major, adverse, psycho-social and socio-economic effects, justify the inclusion of regions with onchocercal skin disease in control programmes based on ivermectin distribution. On the basis of these findings, the World Health Organization launched a control programme for onchocerciasis, the African Programme for Onchocerciasis Control (APOC), that covers 17 endemic countries in Africa.

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DefinitionA health system is an organizational framework for the distribution or servicing of the health care needs of a given community. It is a fairly complex system of inter-related elements that contribute to the health of people -in their homes, educational institutions, in work places, the public (social or recreational) and the psychological environments as well as the directly health and health-related sectors. The organization of health services in NigeriaThe health system in Nigeria is structured along the now universal three levels of the primary, secondary and tertiary levels of care. The system is run concurrently such that all the three levels of government -local, regional/state and national/federal, even though they hold primary responsibility for only one level of the system each, can exceed it and provide services at any of the other two levels of care. One of the effects of this fluid system, in the face of the many social and infrastructural problems facing the nation, is that the pursuit of the politically attractive tertiary health care can remain the only attractive area of the health system, to the detriment of the other levels of care. The neglect of the primary health care system, its maldistribution as well as the secondary health care, will result in an inverted health care pyramid. This will not produce any health for the people but will always have the threat to collapse on itself.