IMPACTO DE Acacia drepanolobium (UNA ESPECIE LEÑOSA ÍNDIGENA INVASORA) SOBRE LOS RECURSOS DE GOMA-RESINA Y ESTRATEGIAS DE VIDA LOCAL EN BORANA, SURESTE DE ETIOPÍA

We investigated the impact of Acacia drepanolobium, a species threatening rangeland resources including Gum-resin production and pastoralists’ livelihoods in Borana. Data were collected through vegetation surveys, key informant interviews, use of formal questionnaires and focus group discussions. We found a total of 22 woody species in the study area. A. drepanolobium was found to be the most dominant (22%) and abundant (65%) invasive woody species with an importance value index (IVI) of 103. According to our respondents, A. drepanolobium was the first widely expanded woody species followed by Dichrostachys cinerea and A. mellifera. Eighty seven percent of our respondents ranked A. drepanolobium as the most invading woody species during their life time. Overall, our results demonstrated that the impact of A. drepanolobium had greatly affected the condition of rangeland vegetation. The implication is that the reduction in the capacity of rangelands for livestock grazing could reduce the resilience of local livelihood under changing environmental conditions. Furthermore, pastoralists’ perception indicated that the expansion of A. drepanolobium had reduced the survival of Gum-resin producing species. Generally, the shift from cattle based pastoral economy to mixed livestock types could be attributed to the expansion of A. drepanolobium that forced the community to shift their mode of production. We confirmed that A. drepanolobium is an invasive indigenous woody species with multiple effects on the ecology of rangelands and on the livelihood security of pastoral communities.Se investigó el impacto de Acacia drepanolobium, una especie que amenaza los recursos disponibles en los agostaderos, incluyendo la producción de goma-resina y las formas de vida pastoralista tradicional en Borana. Se colectó información mediante muestreos de vegetación, cuestionarios, entrevistas a informantes clave y grupos focales de discusión. Se encontró que de un total de 22 leñosas en el área de estudio A. drepanolobium fue la especie dominante (22%) y abundante (65%) con un índice de valor de importancia de 103. De acuerdo a los resultados, A. drepanolobium es la leñosa con mayor expansión seguida de D. cinerea y A. mellifera. Ochenta y siete por ciento de los encuestados calificaron A. drepanolobium como la especie más invasiva durante su tiempo de vida. En general, los resultados muestran que A. drepanolobium ha tenido un gran efecto sobre l vegetación del agostadero. La implicación es una reducción en la capacidad de los agostadores para pastoreo y pudiera reducir la capacidad de respuesta de las formas de vida a los cambios ambientales. Más aún la precepción de los grupos pastorales indica que la expansión de A. drepanolobium ha reducido la sobrevivencia de especies productoras de goma-resina. Generalmente, el cambio de un sistema de ganadería pastoral a un sistema mixto pudiera ser atribuido a la expansión de A. drepanolobium. Se confirmó que A. drepanolobium es una invasora nativa con múltiples efectos en la ecología de los agostaderos y las formas de vida de las comunidades pastoralistas

Schistosomiasis mansoni and soil-transmitted helminthiasis in Bushulo village, southern Ethiopia

Background: Schistosomiasis mansoni and soil-transmitted helminthiasis (STHs) are considerable medical and public health problems in Ethiopia. However, information is limited on the epidemiology of these infections in different localities even though it is needed to plan effective prevention and control measures. Objective: This study was designed to determine the prevalence of Schistosoma mansoni and soil-transmitted helminth infections in school children and residents in Bushulo village near Lake Awassa (Hawassa), southern Ethiopia. Methods: Cross-sectional epidemiological and parasitological studies were conducted on schistosomiasis mansoni and STHs in Bushulo village in May and June 2007. A total of 419 participants (353 school children and 66 other residents) were included in the study. The principal investigator interviewed the study subjects about demographic status using structured questionnaires. Moreover, experienced nurse took history and conducted physical examination to assess symptoms and signs related to chronic S. mansoni infection. A single stool sample was collected from each participant and processed using the Kato-Katz technique. Experienced laboratory technician read all slides at Bushulo Health Center. Results: The overall infection rates of schistosomiasis mansoni, trichuriasis, ascariasis and hookworm infection were 73.7%, 41.5%, 37.2% and 28.4%, respectively. Other parasitic infections observed were caused by Hymenolepis nana (1.7%), Taenia species (1.4%), and Enterobius vermicularis (1.4%). Children in the age range 10-14 years and those attending at St. Paul’s School had higher rates of T. trichiura and S. mansoni, respectively. Intensity of infection was higher for A. lumbricoides in the age range 5-9 years. The overall prevalence of any STHs was 67.3%. The rates of single, dual, triple and quadruple infections were 29.6%, 32%, 20.3% and 7.4%, respectively. Conclusion: The high prevalence and intensity of schistosomiasis mansoni and soil-transmitted helminthiasis makes periodic deworming programme urgent to reduce morbidity and transmission of helminthiasis in the area. Provisions of sanitary facilities and clean water supply as well as health education are also critically needed to sustain the impact of chemotherapy

Woreda Level Participatory Land Use Planning (WLPLUP) Approaches in Pastoral and Agro Pastoral Areas of Ethiopia

Woreda Level Participatory Land Use Planning (WLPLUP) Approaches In Pastoral and Agro Pastoral Areas of Ethiopi

Kinematic Modeling and Analysis of a Walking Machine (Robot) Leg Mechanism on a Rough Terrain

Many manmade machines and mechanisms including robots function based on the concept of nature-inspired design so that they can perform their intended duties by mimicking the working mechanisms of animals and insects. Accordingly, walking machines (robots) use wheels and tracks to cross rough terrain efficiently and in a stable way than more conventional robots. Legged walking robots in particular get a discontinuous contact with the ground that provides them the capability to select tractions such that obstacles or holes are escaped. This article reports a study conducted on kinematic modelling and analysis of a walking machine (robot) leg mechanism that can operate on rough terrain. Its kinematic mechanisms is analyzed using the Denavit-Hartenberg (DH) convention approach. Symbolic computations are also implemented to parametrically optimize the motion parameters of the robot leg mechanism. The equation of motion is derived from the dynamic analysis using the Euler-Lagrange method which involves kinetic and potential energy expressions. In order to validate the performance of the robot leg mechanism and motion behaviors, kinematic motion analysis in SolidWorks and MATLAB are used. The leg mechanism used is effective for rough terrain areas because it is capable of walking on terrain with different amplitudes due to surface toughness and aerodynamics.publishedVersio

Contraceptive Utilization and Its Associated Factors Among Married Women in West African Countries: A Population-Based Survey Using Multinomial Logistic Regression

Bewuketu Terefe,1 Mahlet Moges Jembere,2 Engidaw Fentahun Enyew,3,4 Bogale Chekole5 1Department of Community Health Nursing, School of Nursing, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia; 2Department of Emergency and Critical Care Nursing, School of Nursing, College of Medicine and Health Sciences, University of Gondar, Gondar, Ethiopia; 3Department of Anatomy, School of Medicine, College of Medicine and Health Science, University of Gondar, Gondar, Ethiopia; 4Department of Reproductive Health, Institute of Public Health, College of Medicine and Health Science, University of Gondar, Gondar, Ethiopia; 5Department of Comprehensive Nursing, College of Medicine and Health Sciences, Wolkite University, Wolkite, Southern Ethiopia, EthiopiaCorrespondence: Bewuketu Terefe, Department of Community Health Nursing, School of Nursing, College of Medicine and Health Sciences, University of Gondar, Post Office Box: 196, Gondar, Amhara Region, Ethiopia, Tel +251918099504, Email [email protected]: The international development agenda emphasizes universal access to family planning, as seen in Sustainable Development Goal 3.7. However, the use of modern contraceptive methods remains low in developing countries, specifically in West Africa. This study aimed to assess the current status of contraceptive use in the region, focusing on different methods.Methods: We analyzed Demographic and Health Survey data from 13 West African nations (2012– 2022) involving 117,165 married women. Using binary and multiple multinomial logistic regression, we identified key factors associated with contraceptive use. Adjusted odds ratios with 95% confidence intervals were utilized, and significance was determined at p ≤ 0.2 for binary regression and p < 0.05 for multiple multinomial regression.Results: About 80.86% of women did not use any method, while 16.56% of women used modern methods. Maternal age of 35– 49 years (RRR=0.77, 95% CI, 0.72,0.82), had given first birth after 20 years (RRR=0.80,95% CI, 0.77,0.83), cohabitation after 20 years old (RRR=1.24,95% CI, 1.18,1.29), being employed (RRR=1.38,95% CI, 1.33,1.43), women who have from 3– 5, and more than five living children (RRR=2.06,95% CI,1.97,2.16, and (RRR=2.57, 95% CI, 2.42,2.74), primary(RRR=1.59, 95% CI, 1.52,1.66), secondary/higher education (RRR=2.08, 95% CI, 1.99,2.18), antenatal visit (RRR= 1.38, 95% CI 1.28,1.49), institutional delivery(AOR=1.42, 95% CI, 1.35,1.49), husband working status (RRR=1.39, 95% CI, 1.28,1.51), media exposure(RRR=1.23, 95% CI, 1.19,1.28), visited health facility more than once (RRR=1.09, 95% CI, 1.05,1.13), rural women (RRR=0.89,95% CI,0.85,0.93), female households (RRR=0.79, 95% CI,0.76,0.83), richer (RRR=1.42, 95% CI,1.33,1.51), and richest wealth indexes (RRR=1.69,95% CI,1.58,1.82) were associated.Conclusion: This study revealed a low level of contraceptive use among women in West Africa. Strengthening maternal reproductive health services, such as antenatal care, institutional delivery, and health visits, while also targeting mass media and disadvantaged women, has the potential to significantly increase the adoption of modern contraception techniques.Keywords: contraceptive utilization, family planning, married women, West Africa, multinomial logistic regressio

Comparative clinico-pathological observations in young Zebu (Bos indicus) cattle experimentally infected with Trypanosoma vivax isolates from tsetse infested and non-tsetse infested areas of Northwest Ethiopia

BACKGROUND: The Northwest region of Ethiopia is affected by both tsetse and non-tsetse transmitted trypanosomosis with a huge impact on livestock productivity. The objective of this experimental study was to determine clinical and pathological findings in young Zebu cattle experimentally infected with Trypanosoma vivax isolates from tsetse infested and non-tsetse infested areas of Northwest Ethiopia. A total of 18 cattle (Bos indicus) aged between 6 and 12 months, purchased from a trypanosome-free and confirmed to be trypanosome negative divided into three groups of six animals were used. Animals in the first two groups (Group TT: tsetse infested isolate infected and Group NT: non-tsetse infested isolate infected) received 2 mL of infected blood from donor animals at 10(6) trypanosomes/mL, and the remaining group was non-infected control (NIC). Each group was observed for a period of eight consecutive weeks, daily for clinical signs and once per week for parasitaemia. Postmortem examinations were done on euthanized animals, and tissue samples were taken for histopathological analysis. RESULTS: The prepatent period of the disease was earlier in the NT group 6 days post infection (dpi) than TT group 12 dpi. The infection was characterized by reduced feed intake, intermittent pyrexia and parasitaemia, enlarged lymph nodes, lacrimation, reduced feed intake and emaciation. Less frequently diarrhea, oedema and nervous signs were observed in both groups of infected animals. At necropsy, infected animals showed enlarged spleen, enlarged lymph nodes, pneumonic and emphysematous lung, enlarged liver, and haemorrhages on the brain and intestine. Histopathological analysis revealed lymphoid hyperplasia of the spleen, necrosis of the liver, encephalitis and hyperplasia of lymph nodes. CONCLUSION: Trpanosoma vivax isolates from both tsetse infested and non-tsetse areas showed a variety of virulence factors leading to the development of acute clinical signs, gross and histopathological lesions. However, the parasitaemia and clinical signs appeared earlier in the NT compared to TT infected groups

Spatiotemporal variability of soil moisture over Ethiopia and its teleconnections with remote and local drivers

Soil moisture is one of the essential climate variables with a potential impact on local climate variability. Despite the importance of soil moisture, studies on soil moisture characteristics in Ethiopia are less documented. In this study, the spatiotemporal variability of Ethiopian soil moisture (SM) has been characterized, and its local and remote influential driving factors are investigated. An empirical orthogonal function (EOF) and KMeans clustering algorithm have been employed to classify the large domain into homogeneous zones. Complex maximum covariance analysis (CMCA) is applied to evaluate the covariability between SM and selected local and remote variables such as rainfall (RF), evapotranspiration (ET), and sea surface temperature (SST). Inter-comparison among SM datasets highlight that the FLDAS dataset better depicts the country’s SM spatial and temporal distribution (i.e., a correlation coefficient r=0.95 , rmsd=0.04m3m−3 with observations). Results also indicate that regions located in northeastern Ethiopia are drier irrespective of the season (JJAS, MAM, and OND) considered. In contrast, the western part of the country consistently depicted a wetter condition in all seasons. During summer (JJAS), the soil moisture variability is characterized by a strong east–west spatial contrast. The highest and lowest soil moisture values were observed across the country’s central western and eastern parts, respectively. Furthermore, analyses indicate that interannual variability of SM is dictated substantially by RF, though the impact on some regions is weaker. It is also found that ET likely drives the SM in the eastern part of Ethiopia due to a higher atmospheric moisture demand that ultimately invokes changes in surface humidity and rainfall. A composite analysis based on the extreme five wettest and driest SM years revealed a similar spatial distribution of wet SM with positive anomalies of RF across the country and ET over the southern regions. Remote SSTs are also found to have a significant influence on SM distribution. In particular, equatorial central Pacific and western Indian oceans SST anomalies are predominant factors for spatiotemporal SM variations over the country. Major global oceanic indices: Oceanic Nino Index (ONI), Indian Ocean Dipole (IOD), Pacific warm pool (PACWARMPOOL), and Pacific Decadal Oscillations (PDO) are found to be closely associated with the SM anomalies in various parts of the country. The associationship between these remote SST anomalies and local soil moisture is via large-scale atmospheric circulations that are linked to regional factors such as precipitation and temperature anomalies.publishedVersio

Coupled Impacts of Soil Acidification and Climate Change on Future Crop Suitability in Ethiopia

Agricultural sustainability faces challenges in the changing climate, particularly for rain-fed systems like those in Ethiopia. This study examines the combined impacts of climate change and soil acidity on future crop potential, focusing on Ethiopia as a case study. The EcoCrop crop suitability model was parameterized and run for four key food crops in Ethiopia (teff, maize, barley and common wheat), under current and mid-century climate conditions. To assess the impacts of soil acidification on crop suitability, a simulation study was conducted by lowering the soil pH values by 0.5, 1.0 and 1.5 and re-running the suitability model, comparing the changes in the area suitable for each crop. Our evaluation of the model, by comparing the modeled suitable areas with reference data, indicated that there was a good fit for all the four crops. Using default soil pH values, we project that there will be no significant changes in the suitability of maize, barley and wheat and an increase in the suitability of teff by the mid-century, as influenced by projected increases in rainfall in the country. Our results demonstrate a direct relationship between the lowering of soil pH and increasing losses in the area suitable for all crops, but especially for teff, barley and wheat. We conclude that soil acidification can have a strong impact on crop suitability in Ethiopia under climate change, and precautionary measures to avoid soil acidification should be a key element in the design of climate change adaptation strategies

The immunology and genetics of resistance of sheep to Teladorsagia circumcincta

Teladorsagia circumcincta is one of the most economically important gastrointestinal nematode parasites of sheep in cool temperate regions, to which sheep show genetically-varying resistance to infection. This is a very common parasite and viable sheep production requires the extensive use of anthelmintic drugs. However, the emergence of drug-resistant parasites has stimulated the search for alternative control strategies to curb production losses. Lambs become infected soon after weaning and begin to control parasite burden within 8-10 weeks of continual infection. This control is an acquired characteristic mediated by the development of parasite-specific antibodies. This paper describes the immunology associated with resistance and susceptibility, focussing on differential T cell activation that regulates the production of specific effector mechanisms. It continues by summarizing the methods used to identify genes that could be exploited as molecular markers of selection for resistance. In particular it focusses on the link between understanding the molecular immunology of infection and the identification of candidate genes for selection

Efficiency of TB service provision in the public and private health sectors in Ethiopia.

BACKGROUND: The Ethiopian Government has identified efficiency of TB services as a key priority in planning and budgeting. Understanding the magnitude and sources of inefficiencies is key to ensuring value for money and improved service provision, and a requirement from donors to justify resource needs. This study identifies the cost of providing a wide range of TB services in public and private facilities in Ethiopia.METHODS: Financial and economic unit costs were estimated from a health provider´s perspective, and collected retrospectively in 26 health facilities using both top-down (TD) and bottom-up (BU) costing approaches for each TB service output. Capacity inefficiency was assessed by investigating the variation between TD and BU unit costs where the factor was 2.0 or more.RESULTS: Overall, TD unit costs were two times higher than BU unit costs. There was some variation across facility ownership and level of care. Unit costs in urban facilities were on average 3.8 times higher than in rural facilities.CONCLUSION: We identified some substantial inefficiencies in staff, consumable and capital inputs. Addressing these inefficiencies and rearranging the TB service delivery modality would be important in ensuring the achievement of the country´s End TB strategy