The Role of Current Emergency Radiology Practice: A prospective Cross-sectional Study Done at Tikur Anbessa Specialized Hospital

Background: The role of radiogy in the management of emergency  patients is tremendous. Which imaging modality best evaluates specific clinical emergencies has evolved and continues to advance with clinical practice trends. The purpose of this study was to show the role of radiology in emergency patient handeling and compare specific clinical entities with the standard.Methods: A prospective cross sectional study was done to describe the pattern of duty hour emergency utilization at Tikur Anbessa Hospital Department of Radiology. A total of 384 patient’s data were collected for the period of Jananuary 1st to April 30th 2010. The data which weredemographic variables, clinical diagnosis, radiologic diagnosis, type of investigation used, type of anatomic area imaged, whether primary investigation used or not, recommendations made by the radiology residents were collected and tabulated.Results: There were 242 (63%) males and 142 (37%) females. Suspected fracture was the commonest clinical indication for referring patients to the department of radiology at the duty hours and accounted for 40.9% of all cases. Otherclinical diagnoses included pnumonia (21.6%), blunt  abdominal trauma (5.7%) and pulmonary edema (4.7%). Plain  radiographs were taken in 88% of patients sent for imaging. Among the sonographic studies done, 43.4% were for patients presenting with blunt abdominal trauma. Of all patients in 90.4% primary investigative  modalities were used. Comparison of clinical and radiologic diagnosis was made in most common clinical cases and in general 51.3% of radiologic interpretations were normal.Conclusion: Plain radiography was used as the cornerstone investigative modality for emergency imaging. Fracture and pneumonia constituted the commonest indications for emergency imaging in all age groups. Over half of radiologic investigations were normal. It was observed that lack ofappropriate investigative modalities such as CT scan, doppler and high frequency ultrasonography greatly affected the quality of service the department offered and also negatively affected the training process.Key words: Emergency, Radiology, Practic

Incidence of neonatal morbidity at Gondar Town, Ethiopia

A CAJM article on rates of infant mortality in Gondar, Ethiopia.Perinatal, neonatal and infant mortality rates are now recognized indicators of child health in many countries and regions of the world. To this effect, there are numerous epidemiological and clinical studies that have focused on the causes of perinatal, neonatal and infant mortality in a given community or country. But, information on neonatal morbidity rates are not generally available.' The very limited data on neonatal morbidity also have problems of definition and are not as unambiguous and comprehensive as are the indices of mortality. Morbidity health interview surveys are widely used in developed countries to obtain information about sickness, disability, and the use of health facilities. An alternative method for collecting morbidity information is a survey based on physical examination where subjects are expected to attend a clinic or to be examined in their dwelling places. Use of clinical medical records also provide information on health as the need arises. Each of these systems of collecting information have their own advantages and disadvantages

Opportunities for exploiting underutilized feed resources to enhance market-oriented animal production in North-western Ethiopia

This study was conducted in Metema district, Amhara Region, Ethiopia to characterize the existing feed resources and recommend their enhanced utilization for animal production. The major feeds were pasture (55.7%), crop residues (20.7%), stubble (14.3%) and hay (9.3%). The estimated annual feed supply was 833,531.2 tons DM and 94% came from natural pasture. About 33 herbaceous species and 20 woody species that are highly desirable, desirable and less desirable were identified. The total dry matter biomass and the high proportion of desirable species could be effectively utilized to support market-oriented ruminant production in the district and beyond

Rangeland condition and feed resources in Metema district, North Gondar Zone, Amhara Region, Ethiopia

The study was conducted in 2006/07 in Metema district, North Gondar Zone of Amhara region, Ethiopia, with the objectives to characterize the existing rangeland and to determine the feed resources utilization practices, to assess the natural grazing land condition based on herbaceous, woody and soil condition and to evaluate the chemical composition of major livestock feed resources of the area. A single-visit formal survey, group discussions and visual observations are used to collect the primary information and secondary sources are also used in livestock feed resources assessment of the district. A total of 140 respondents from 7 kebeles were selected for interviewing by stratified random sampling techniques. To assess the range conditions, the samples were collected by classifying the district into cotton–livestock and sesame–livestock farming systems. Within a farming system, grazing lands were further stratified into three sampling areas: communal, road side and enclosure grazing areas. In each of the range sites a sampling block of 4 km × 1 km was demarcated and this was further stratified into four sampling plots of equal size. In each of the plot, a belt transects of 50 m × 4 m was laid out randomly. Then, the parameter used for (herbaceous, soil and woody) grass species composition, basal cover, litter cover, soil erosion, soil compaction, seedling count, age distribution and woody density enumeration, canopy cover and hedging were determined. For the height classes 1–3 m, >3–4.5 m and >4.5 m was used. Feed samples were stratified by season and types and subjected to chemical analysis for determination of DM, ash, CP, ADF, ADL and IVDMD. About 83% of the inhabitants in the district practice mixed crop–livestock farming system. The mean family size is 5.31 ± 0.20 persons per household, while the average land holding is 6.78 ± 1.33 ha/household. The mean livestock holding per household is 12.52 ± 6.23 TLU, and is composed of cattle, goats, sheep, donkeys and camels. Natural pasture (55.7%), crop residues (20.7%), stubble (14.3%) and hay (9.3%) are the major feed resources for dry season whereas in the wet season only natural pasture serves as feed resource. The total estimated DM yield of grazing land and stubble is 780,750 and 51,954 t DM per annum, respectively. The total estimated available feed supply is 833,531.2 t DM per annum. Of the identified 33 herbaceous species, 14 and 19 are different grasses and non-grass species. From the non-grass species 6 legumes and 13 sedges and other species are recorded. Of the grasses, 23.07%, 38.46% and 30.77% are highly desirable, desirable and less desirable, respectively. Of the identified 20 woody species, 15%, 35%, and 50% are highly desirable, desirable and less desirable, respectively. The largest proportion of woody vegetation is contributed by different species of acacia (20%)and commbretum (10%). Trees and shrubs grouped within the height class of >1–3 m constituted 41.2% in communal grazing areas, 38.5% in road side grazing and 33.3% in enclosures. Range condition assessment factors such as basal cover, litter cover, grass species composition, woody vegetation density, canopy cover, hedging effect, age distribution and total condition score are significant (P<0.05) in communal grazing areas of the sesame–livestock than in the cotton–livestock farming system. The communal grazing areas have significantly (P< 0.05) higher values of grass species composition, basal cover, litter cover, age distribution, and woody species density score, than the road side grazing areas and lower (P<0.05) than the enclosure grazing areas. The dry matter biomass of grass, highly desirable, desirable species of grasses and legumes and others obtained in the same farming system were significantly (P<0.05) higher than the road side grazing types and lower (P<0.05) in total grass biomass, highly desirable grass, and total biomass than enclosure areas. The total dry matter biomass, dry matter biomass of grass and highly desirable grasses, and legumes are significantly (P<0.05) higher in the enclosure followed by communal grazing and the road side grazing areas. In general, there is low feed resources conservation and utilization and very poor traditional grazing land management system in Metema. The abundant feed resources in the wet season are wasted. In the dry season, grasses are turned to ash by wild and man-made fire in the process of forest honey harvesting and crop land cleaning. As a result, the livestock populations seriously suffer from the critical feed shortage during the long dry season.The rangeland, species composition and biomass production are also affected by human, livestock and natural factors (biotic and abiotic factors). The human population of the district has increased due to settlement programs, investment induced settlers, expanding crop cultivation and have increased the pressure on the rangelands and natural grazing areas. Bush encroachment and overgrazing are also serious problems. Shifting cultivation practice is also contributing to the increased bush encroachment. The seasonal movement and transhumant livestock production by highlanders in adjacent districts also increases the grazing intensity. Absence of adequate baseline information about the rangeland resources, unsynchronized seasonal availability of feed resources and cropland encroachment to the rangeland are some of the main constraints of the district, and studies on rangeland management systems and improved livestock production should be initiated

Transhumance cattle production system in North Gondar, Amhara region, Ethiopia: is it sustainable?

The study was carried out in three highland woredas (districts) of Chilga, Dembia and Gondar Zuria in north Gondar Zone, Amhara Region, Ethiopia. These woredas were purposively selected because of their long experience in transhumance cattle production system. The objectives of the study were to characterize the transhumance cattle production system, identify the major constraints and forward appropriate developmental interventions for the future. Informal and formal surveys were employed to collect qualitative and quantitative data. From these woredas, a total of 180 representative households from 9 rural kebeles were selected using systematic random sampling methods. Semi-structured questionnaires and topical guidelines (checklists) were used to collect data. The results revealed that livestock production system in the highlands is characterized by mixed crop–livestock production and rainy season transhumance production system. Transhumance production system was practised mainly into the lowland areas. The major reasons why cattle were trekked to the lowlands were availability of feed (99.2%), free land for stocking (92.4%), low disease risk (25.0%) and availability of non-waterlogged areas (0.8%). Preferred locations were Metema (84.0%), Armachiho (9.6%), and Quara (4.0%) woredas, while very low percentages considered Alefa and Chilga woredas (0.8% each). The months when cattle movement started were May (69.5%), June (29.6%) and April (0 .8%), and the months of returned home were October (45.8%) and September (35.9%). Three major cattle trekking routes were identified, and the selection of routes depended on distance, availability of forage and non-crop covered areas. The first destination is Agamwuha kebele (Lemlem Terara) in Metema district, irrespective of the routes followed. About 60.3% of the cattle population of the three woredas was trekked to the lowlands during the rainy season. The number of cattle owners and the size of cattle population involved in one group were 4.3 ± 0.18 farmers and 58.8 ± 3.89 heads, respectively. The average daily milk off-take, lactation yield and lactation length of indigenous cows in the three studied areas was about 2.0 ± 0.07 litres, 540 ± 21.05 litres, and 8.9 ± 0.16 months, respectively. The mean age at first calving (AFC) and calving interval (CI) was 5.2 ± 0.30 years and 19.0 ± 0.38 months, respectively, while mean calf crop was 7.4 ± 0.47 heads. The average weaning age of calves was almost one year, being 11.6 ± 0.26 months. In the lowlands, milking, butter making and selling of dairy products were performed only by male herders. In the highland areas, butter (95.6%) was one of the most important saleable dairy products followed by raw milk (18.4%), fermented milk (ergo) and buttermilk (6.1%). However, during the transhumance period, butter (95.3%) was the major marketable commodity followed by raw milk (61.3%), buttermilk (18.9%) and fermented milk (14.2%). Highlanders also market dry cows, oxen, heifers and young bullocks during their stay inthe lowlands. The major constraints identified by the highlanders were conflict with the lowlanders, cattle theft, human and livestock diseases, and lack of markets. Most of the respondents (86.3%) estimated that the trend of transhumance has been increasing due to feed shortage (50.4%), expansion of crop cultivation (27.4%) and increasing cattle population (21.2%) in the highlands. Human population has also been increasing both in the highlands and lowlands, and the current infrastructure development in the lowlands (tarmac road, electricity, phone etc.) will further encourage more migration to the lowlands. The conflict over resources will intensify, probably leading to the demise of this production system unless alterative development strategies, such as intensification of the production system in the highlands and development of feed conservation and marketing in the lowlands are devised

Assessing Soil Nutrient Additions through Different Composting Techniques in Northern Ethiopia

The use of vermi-compost in northern Ethiopia is not a common practice. It is, therefore, important to understand the possible impediments through studying its chemical and biological properties and its extra contribution compared to other composting techniques. Four compost types (vermi-compost, conventional compost, farmers’ compost and community nursery compost) with three replications were used in this study. The farmers’ and community nursery compost samples were collected from different places in Tigray; whereas, the vermi- and conventional composts were prepared at Mekelle University following a standard composting procedure. Six major composting materials were identified in the visited sites from farmers’ and community nursery foremen’s interview. These composting materials were also used for the vermi- and conventional composting. Twelve composite compost samples were taken for analysis of macro- and micro-nutrients. The results of the experiment showed that for all treatments, despite of having high content of total C (5.04 – 10.67%), the C/N ratio (12.19 – 12.22) was low. This suggests that as the C/N ratio is lower than the threshold (&lt; 30), mineralization is faster, nutrients eventually become available and a large amount of N is lost. Soil pH, exchangeable Magnesium (ex.Mg), exchangeable Potassium (ex.P), available Phosphorus (ava.P), and Cation Exchange Capacity (CEC) showed significant differences among the different composting techniques. Among the selected compost types, ex.Mg, ex.Ca and av.P were higher for vermi-compost. The lowest was recorded in community nursery compost. The use of vermi-compost is, therefore, very helpful in terms of providing beneficial soil nutrients as compared to other compost types.Keywords: Conventional compost, Vermi-compost, farmers’ compost, Nursery compost, Macro-nutrients, Micro-nutrients

Sustainable land management through market oriented commodity development: Case studies from Ethiopia

Land degradation has been identified as severe environmental problem in Ethiopia, especially since the early 1970s. Because there is significant degradation on cultivated lands in Ethiopia, there is potentially high payoff to addressing degradation in the country. In this paper we focus mainly on the effect of short-term benefits to farmers and the explicit considerations of the linkages between natural resource management and market-oriented commodity development on the adoption and scaling out of sustainable land management practices. We hypothesize that linking natural resource management with market-oriented commodity development enhances sustainable land management by providing farmers with short-term benefits. We test this hypothesis with analysis of case studies of four districts in Ethiopia. Two of the case studies deal with the linkage between grazing land development and market-oriented livestock development, and the other two deal with the linkage between conservation agriculture and market-oriented crop production. Results indicate that, indeed, direct linkages of natural resource management with market-oriented commodity development that have profitable market opportunities can enhance sustainable land management. Results imply that participatory approaches to the appraisal of community resources, identification and prioritization of key constraints of commodity development, and implementation of interventions greatly facilitate adoption and scaling out of interventions

The dynamics underlying pseudo-plateau bursting in a pituitary cell model.

This is the final version of the article. Available from BioMed Central via the DOI in this record.Pituitary cells of the anterior pituitary gland secrete hormones in response to patterns of electrical activity. Several types of pituitary cells produce short bursts of electrical activity which are more effective than single spikes in evoking hormone release. These bursts, called pseudo-plateau bursts, are unlike bursts studied mathematically in neurons (plateau bursting) and the standard fast-slow analysis used for plateau bursting is of limited use. Using an alternative fast-slow analysis, with one fast and two slow variables, we show that pseudo-plateau bursting is a canard-induced mixed mode oscillation. Using this technique, it is possible to determine the region of parameter space where bursting occurs as well as salient properties of the burst such as the number of spikes in the burst. The information gained from this one-fast/two-slow decomposition complements the information obtained from a two-fast/one-slow decomposition.This work was supported by NSF grant DMS 0917664 to RB and NIH grant DK 043200 to RB and JT