Doctors and nurses in most developing countries lack access to adequate health information, that is, the lifeblood for the delivery of quality health care services. This problem is further compounded by the fact that correct techniques and equipment are not applied to provide access to reliable health information. Based on previous literature, it is assumed that information should be managed in the same way capital, labour and human resources are managed so that healthcare providers and medical professionals should be able to have relevant information to assist then in their daily activities, to help them to learn, to diagnose and to save lives. Relevance and reliability are paramount in meeting health information needs. A number of studies have shown that the application of information and communication technologies (ICTs) in the management of health information is a prerequisite to wider accessibility and availability of relevant health information. Health information management is the continuum of processes in managing health-related information. It is composed of the use of technologies (computers, hardware, software and telecommunication), personnel (trained information specialists), and the allocation of financial resources to achieve the major goals of the organisation such as a hospital. The aim is to collect, process, store, retrieve and disseminate adequate health information to the right person, in the right form, at the right time. This study investigated the application of ICTs in the management of health information by medical professionals in six selected government hospitals in Yaounde, Cameroon. The basis of the study was that through the effective application of ICTs in the management of health information, relevant and timely information would be made available to medical professionals. It was the researcher's view that unless we understand the importance of information in the development of the health system, and apply the use of ICTs in its management, the delivery of health care services will constantly remain poor. Data was collected from six government hospitals in Yaounde through a self-administered questionnaire given to nurses and medical doctors. The data collected from 141 medical professionals [doctors and nurses] were presented, using descriptive statistics in the form of frequency distribution and percentage. The findings of the study revealed that medical professionals are dissatisfied with the major method of information exchange activities, that is, face-to-face interaction with colleagues. In addition, the study found that health information is captured, processed and stored manually. This is very detrimental to medical professionals, because relevant information is not always available when needed. The study found that the barriers to adequate information exchange activities were lack of information support services, irregular distribution of information and poor co-operation and collaboration among medical professionals. The study also revealed the non-availability of ICTs and Internet resources and lack of basic computer skills. Consequently, there is low utilisation of ICTs by medical professionals and limited information needs are being satisfied. Medical professionals unanimously favoured the application of Internet services or an electronic health information resource to supplement the current method of managing and accessing health information. Lack of training on the use of computers and Internet resources were the main factors that hinder the use of ICTs by medical professionals. The study concluded by calling on directors of hospitals, medical professionals and the Ministry of Health Officials to provide ICTs and Internet resources to medical professionals and provide them with basic computing skills and training. It further called for the recognition of information as an important resource for national development and called for formulation of a national information policy. With an information policy, information needs would be clearly defined and the provision of information services throughout the country would be regulated. In addition, medical professionals must create a free-flow of information and constant communication outlet to exchange and disseminate local health information. The high demand for basic training on the use of ICTs could be provided through in-service training or refresher courses. / Thesis (M.I.S.)-University of Natal, Pietermaritzburg, 2003.

PhD (Geology) / Department of Mining and Environmental Geology / Cretaceous-Tertiary Periods marked the break-up of Gondwana, a large landmass composed of most of the present-day southern continents. In understanding the events of the supercontinental break-up, paleoenvironmental studies need to be carried out. In such studies, kaolinites could be used as paleoenvironmental proxies due to their small particle sizes and large surface area. It is in this context that this research sought to reconstruct the paleoenvironments in which selected Cretaceous-Tertiary kaolin deposits in the Douala Sub-Basin in Cameroon formed. To achieve this objective, mineralogical and geochemical characterisations were carried out using x-ray diffractometry, scanning electron microscopy, Fourier transform infrared spectrometry, thermal analyses and x-ray fluorescence spectroscopy. Trace elements and stable isotopes were analysed using mass spectrometries. Ages of zircons in the kaolins were determined using laser ablation magnetic sector-field inductively coupled plasma mass spectrometry (LA-SF-ICP-MS) U-Pb geochronology. Diagnostic evaluation for industrial applications of the kaolins were carried out using particle size distribution, texture, moisture content, pH, and electric conductivity. Six kaolin deposits from Cretaceous-tertiary Formations of the Douala Sub-Basin were studied; namely, Bomkoul (Tertiary), Dibamba (Tertiary), Ediki (Cretaceous), Logbaba (Cretaceous), Missole (Tertiary) and Yatchika (Cretaceous). The nature and occurrences of these kaolin deposits in Cameroon were determined through thorough mineralogical and geochemical characterisations of bulk (< 2 mm size fraction), silt (2-63 μm size fraction) and clay samples (< 2 μm size fraction). By quantifying the mineral phases present, the morphology and the functional groups in the kaolins are presented as the mineralogical characteristics of kaolins of each study site; whereas, the major oxides geochemistry and the micro-elemental composition constitute the geochemical characteristics of these kaolins. The minerals’ geneses were also determined and the prevailing paleoenvironmental and paleoclimatic conditions in which they were formed were reconstructed using trace elements and stable isotopes of oxygen and hydrogen in kaolinite. The maximum age of the kaolins were determined using U-Pb LA-SFICP-MS dating of zircons in the kaolin deposits. Diagnostic evaluation of the kaolins was carried out, and involved the determination of physical characteristics (particle size, texture, colour and moisture content) and physico-chemical characteristics (pH and electrical conductivity). Results showed that kaolinite and quartz (as major phases), smectite and/or illite (as minor phases), anatase and rutile (as minor or trace phases), goethite and hematite (as trace viii phases) were the mineral phases present in bulk and silt samples. Whereas, in the < 2 μm fractions, the mineral phases are made up of kaolinite and smectite (as major phases), smectite and/or illite (as minor phases), anatase and rutile (as minor or trace phases), goethite and hematite (as trace phases). The kaolins are mostly made up of thin platy or pseudo-hexagonal particles or flakes, books or stacks of kaolinite. The Dibamba, Logbaba and Missole II kaolins have well-ordered structures. Exothermic peak temperatures were generally between 943-988oC. The most abundant major oxides are silica and alumina, followed by iron oxide and titania; though Logbaba and Missole II had higher titania than iron oxide. 85% of the kaolins, portrayed extreme silicate weathering (chemical index of alteration > 80%) and are compositionally mature (index of compositional variability > 0.78). The geochemical composition of the kaolins showed that source rocks of these kaolins vary between rhyolite/granite and rhyolite/granite + basalt. The geochemistry also suggested that the kaolins formed in a marine environment (except Logbaba samples). Trace elements results revealed that Cretaceous-Tertiary kaolins in the Douala Sub-Basin are mainly enriched in rare earth elements compared to the upper continental crust, and have negative Eu anomaly. Large ion lithophiles (mainly Rb and U) were highly enriched in samples, high field strength elements (Y and Nb) were enriched in studied samples of all fractions; and transition trace elements generally had concentrations quite similar to upper continental crust values. Stable isotopes showed that the kaolins were formed in a supergene environment; and temperatures of kaolinitisation (assuming equilibrium with the global meteoric water line) were 26.58oC ± 9.65oC for Cretaceous kaolins and 29.40oC ± 7.22oC for Tertiary kaolins. Assuming equilibrium with the local (Douala) meteoric water line, the temperatures of kaolinitisation were 24.64oC ± 9.48oC for Cretaceous and 27.42oC ± 7.08oC for Tertiary kaolins. Four main zircon populations were identified from radiogenic dating: the 1st between 550 and 650 Ma, the 2nd between 950 and 1050 Ma, the 3rd around 1600 Ma and the 4th between 2800-3200 Ma. These four zircon populations belong to the Proterozoic (Neo-, Meso- and Paleoproterozoic) and the Archean. The maximum depositional ages of the kaolins, reflected by the youngest weighted averages of zircon populations varied between 588 ± 2 Ma and 612 ± 2 Ma, all belonging to the Ediacaran Period (Neoproterozoic). The diagnostic evaluation of the kaolins revealed that the kaolins are very sandy, with 50% of the samples having a sandy loamy clay or sandy loam texture. The colour of the samples varied considerably from white to darker colours (dark grey); with 15% of the kaolins being light reddish brown. The moisture content was generally very low (< 2 wt %) in all size fractions, except in Yatchika samples (moisture content > 2 wt %). The kaolins are generally acidic, with ix a pH(KCl) varying between 3.06 and 3.81, except in Missole I samples, which had a pH (KCl) < 2. The electrical conductivity (EC) generally varied between 20 to ~ 50 μS/cm, except Dibamba and MSL II 01 samples which had EC values in the interval 50 μS/cm < EC < 80 μS/cm; and Missole I samples having an EC > 7500 μS/cm. In conclusion, no great distinction was found between Cretaceous and Tertiary kaolins of the Douala Sub-Basin based on their mineralogy and geochemistry. The best kaolins in terms of these characteristics, and in comparison with the Georgia Kaolins (known for their high kaolinite quality), were the Dibamba (Tertiary), Logbaba (Cretaceous) and Missole II (Tertiary) kaolins. Based on their compositional maturity and mineralogical characteristics, these three kaolins are considered to be second cycle sediments; unlike Bomkoul, Yatchika and Ediki kaolins, which are believed to be first cycle sediments. Based on the trace elements and stable isotopes composition, Cretaceous and Tertiary kaolins of the Douala Sub-Basin were derived from felsic rocks. However, Cretaceous kaolins were formed in a cooler anoxic reducing environment; whereas the Tertiary kaolins were formed in a warmer oxidising environment, with higher precipitation. Ages of zircons in Cretaceous-Tertiary kaolins suggested that the zircon formed during two main tectonic events: the Eburnean orogeny, during which older zircons crystallised and the Pan-African orogeny, during which younger zircons crystallised. The maximum depositional ages of the kaolins varied between 588 ± 2 Ma and 612 ± 2 Ma. The main identified sources of these zircons are the Archean Ntem Complex, the Paleoproterozoic Nyong Group and the Neoproterozoic Yaounde Group. The diagnostic evaluation indicated that the particle size greatly influences the mineralogy and geochemistry of the kaolins because the finer particles (< 2 μm) have higher amounts of kaolinite and Al2O3. The moisture content of the kaolins makes them suitable as paint fillers and in soap production. Paper coating, paper filler, ceramics, pharmaceutics and cosmetics are potential applications for the kaolins, though particle size reduction and beneficiation will give them a higher quality. However, because these kaolin deposits are not big and extensive, they cannot be recommended for large scale industrial applications; but they can be used for bricks, pottery and stoneware manufacturing.

Thesis (doctoral)--Université de Paris 1, 2005. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (p. 522-557).

Thesis (doctoral)--Université de Paris 1, 2005. / Includes bibliographical references (p. 522-557).

MSc (Microbiology) / Department of Microbiology / See the attached abstract below

Biodiversity patterns of butterflies and moths are investigated on the southwestern slope of Mount Cameroon, the only continuous elevational gradient of near-pristine forests in the Afrotropics. Three distinct seasons between 2014 and 2017 are sampled by two standardised methodologies (i.e., bait-trapping and manual catching of selected groups of moths at light). First, the effects of seasonality and forest habitat associations on butterflies and moths are investigated in the lowland rainforest. Then, the impacts of elephant-made natural disturbances on tree, butterfly, and moth diversities at mid-elevations is evaluated. The thesis also includes faunistic records of species never reported from the area, combining them with life history notes on selected taxa and species description of nine new species of Alucita. Finally, the last chapter focuses on the biodiversity of birds, trees, and butterflies in the last large patch of coastal forest of the studied area, and discusses its current conservation status.

Thesis advisor: Andrew Davis / Thesis advisor: Richard J. Clifford / The theme of exile in the second part of the book of the prophet Isaiah has prompted me to reflect on the refugee crisis in Cameroon. Refugees in the north of Cameroon hail from Nigeria where Boko Haram, an Islamic militant movement, has destroyed their towns and villages. The new exodus is about the triumphant and glorious return of the exiles from Babylon to the promised land. At this triumphant return, the main actor is God. I perceive parallels between this experience and the refugee experience in the north of Cameroon. / Thesis (STL) — Boston College, 2018. / Submitted to: Boston College. School of Theology and Ministry. / Discipline: Sacred Theology.

Health education and preventive chemotherapy are main strategies to control or eliminate neglected tropical diseases (NTDs) such as lymphatic filariasis (LF), trachoma, onchocerciasis, schistosomiasis (SCH), and soil-transmitted helminthiasis (STH). Integrated MDA for LF, onchocerciasis, SCH, STH, and trachoma were organized in the Koza district of Cameroon from July to August 2011. Ivermectin (IVM) and albendazole (ALB) were distributed for LF to the entire population except pregnant or lactating women, children <90 cm in height, and the severely ill. Azithromycin was distributed at least one week after the LF MDA to all persons older than 6 months of age. Praziquantel (PZQ), targeting school age children (SAC), was only distributed in schools. In order to validate reported coverage and assess the knowledge and attitude of the population towards NTDs and MDAs, an independent coverage and Knowledge, Attitudes, and Practice (KAP) survey was administered. The WHO recommended population based 30-cluster coverage survey was implemented. Clusters were selected by Probability Proportional to Estimated Size and in each cluster, 10 houses were selected using the improved expanded program on immunization random walk. Coverage questions were administered by trained interviewers to each person living in selected houses and KAP questions were asked to a randomly selected adult in the house. A total of 1301 persons participated in the coverage survey and 149 adults answered the KAP questions. The survey coverage estimates for IVM /ALB and azithromycin are 76.9% (95% CI 72.0-81.9), 86.8% (95% CI 80.9-92.7), respectively, while the reported coverage is 80.3% and 93%, respectively. The survey coverage estimated for PZQ among SAC is 39.9% (95% CI 30.7-49.1), reported coverage is unknown. There was no significant association between participation in the MDA and age, gender, or knowing the disease. SAC who attended school were 269 times as likely to have taken PZQ and 3 times as likely to have taken LF drugs as SAC not attending school. Less than 50% of respondents had heard of LF and only 31.8% could mention at least one LF symptom. More than 70% of respondents had heard of STH, SCH, and trachoma, but only 52.3%, 40%, 30%, respectively, knew at least one way to prevent or treat STH, SCH, and trachoma. Despite low or incorrect knowledge of LF, SCH, STH, and trachoma, overall, MDA coverage was good except for the PZQ which was only distributed in school.

No description available.

No description available.