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Heroda Gebru,1 Negussie Deyessa,2 Girmay Medhin,3 Helmut Kloos4 1Ethiopian Institute of Water Resources, Addis Ababa University, Addis Ababa, Ethiopia; 2School of Public Health, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia; 3Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia; 4Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, USACorrespondence: Heroda Gebru, Email herodagebru13@gail.comBackground: The recurrence of intestinal parasitic infections (IPIs) can lead to different problems that can be transferred from generation to generation. Sanitation and hygienic practices have vital role in the parasitic reinfection. In poor hygienic and sanitation condition children may live in a continuous cycle of infection and reinfection.Objective: To assess childhood IP reinfection and its association with sanitation and hygienic practice in eastern Ethiopia.Methods: A population-based case-control design was used in this study. Data were collected from 75 reinfected cases and 147 unmatched controls. Fecal specimens were observed for parasites using direct smear and formol ether techniques. Epi-Info and SPSS (the statistical package for social science) were used for data entry and analysis, respectively. Logistic regression analysis was conducted to identify significant associations (P< 0.05) between variables.Results: The overall IP reinfection rate within 24 weeks after treatment was 33.8% (75/222), with a 95% CI=27.7%– 40.5%. The frequency of intestinal protozoa was 18%, and for helminths was 15.8%. Children who swam in a polluted water had 3.7 times greater odds of IP reinfection than children who did not swim (P =0 .01, 95% CI: 1.4– 10.0). Children who regularly bathed in streams and children who bathed both at home and in streams were found to have 12.6 times and 5.8 times higher odds of IP reinfection than children who bathed regularly at home (P=0.002, 95% CI:2.5– 64.8) and (P = 0.042, 95% CI:1.1– 31.3), respectively. Children in households that owned domestic animals had 4.5 times higher odds of IP reinfection than the reference group (P = 0.013, 95% CI: 1.3– 12.5).Conclusion: IP reinfection rates were significantly associated with habits of swimming in a polluted water, places of bathing, and ownership of domestic animals. Therefore, efforts should be made considering such factors to minimize IP reinfection in the area.Keywords: Ethiopia, hygiene, reinfection, sanitation

Alelgne Feleke,1 Metadel Adane,1 Asha Embrandiri,1 Gete Berihun,1 Zebader Walle,2 Awoke Keleb,1 Helmut Kloos3 1Department of Environmental Health, College of Medicine and Health Sciences, Wollo University, Dessie, Ethiopia; 2Department of Public Health, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia; 3Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, USACorrespondence: Alelgne Feleke; Metadel Adane, Email alelgnefe@gmail.com; metadel.adane2@gmail.comBackground: Knowledge, attitudes, and misconceptions of students about COVID-19 (coronavirus disease) prevention have been examined in relatively few studies. This study aimed to assess the knowledge, attitudes and misconceptions about COVID-19 prevention practices among high and preparatory school (grades 9 to 12) students in Dessie City, Ethiopia.Methods: This school-based cross-sectional study used a pre-tested structured questionnaire and direct observations from March 1 to 30, 2021 in 5 high and preparatory school students in Dessie City, Ethiopia. The sample size was proportionally allocated in each school based on the number of students registered in the first semester, stratified by grade level, and section. Data analysis employed 3 binary logistic regression models (Models I, II and III) with 95% CI (confidence interval). Bivariate analysis (crude odds ratio [COR]) and multivariable analysis (adjusted odds ratio [AOR]) were used. Variables with P-values < 0.3 in the bivariate analysis were retained in the multivariable logistic regression analysis for each model. Variables with significance levels P< 0.05 in the multivariable analysis of each model was identified as significant factors.Results: The levels of good knowledge, positive attitudes, and low misconceptions were 74.8%, 60.2%, and 56.1%, respectively. After adjusting for the covariates, grade 12, positive attitude and living in households with more than 5 members were identified as factors significantly associated with good knowledge about COVID-19 prevention practices. Good knowledge of COVID-19 prevention practices, household size > 5, infection prevention and control (IPC) training, and low level of misconceptions were factors significantly associated with positive attitudes, whereas students age ≥ 18 years, positive attitude, and IPC training were factors significantly associated with less misconceptions about COVID-19 prevention measures.Conclusion: The prevalence of good knowledge, positive attitude, and low level of misconceptions of prevention practices for COVID-19 among students was relatively low. Therefore, Dessie City Health and Education Department and each high and preparatory school should implement continuous monitoring programs to ensure high prevention awareness and promote preventive behavior towards COVID-19.Keywords: COVID-19, knowledge, attitudes, misconceptions, high and preparatory school, students, Dessie City, Ethiopia

To satisfy the growing demand for electricity, Ethiopia plans to increase its electricity production five-fold between 2010 and 2015, mainly through the construction of dams. A literature review shows that while dams can boost power and agricultural production, promote economic development, and facilitate flood control, they can also lead to environmental, ecological, and socioeconomic changes. Several case studies show that dams may alter the composition and density of vectors and intermediate host species, increase the incidence of malaria schistosomiasis and possibly lymphatic filariasis, and lead to eutrophication of reservoirs, soil erosion, and earthquakes. There is evidence that dams and commercial irrigation schemes can increase soil and water degradation, vulnerability to drought, and food insecurity in riverine and lacustrine areas downstream of dams. It appears that dams in Ethiopia are also vulnerable to high soil erosion rates and earthquakes. Consequently, the current and proposed large-scale dam construction program in Ethiopia requires in-depth research to improve our understanding of the unintended negative effects of projects and to guide the location, design, and implementation of appropriate preventive and remedial programs. Key words: water resource developments, environment, food security, vector-borne diseases, Ethiopia. Les auteurs presentent une revue de litterature montrant qu'en depit du fait que les barrages peuvent favoriser les productions d'energetiques et agricoles, promouvoir le developpement economique et faciliter la maitrise des inondations, ils peuvent egalement provoquer des changements environnementaux, ecologiques et socio-economiques. Plusieurs etudes de cas montrent que les barrages peuvent modifier la composition et la densite d'especes hotes vectrices et intermediaires, augmenter l'incidence de la schistosomiase de la malaria et possiblement la filariose lymphatique, en plus de conduire a l'eutrophisation des reservoirs, a l'erosion du sol et aux tremblements de terre. Il y a des preuves a l'effet que les barrages et les systemes d'irrigation commerciaux peuvent augmenter la degradation de l'eau et des sols, la vulnerabilite a la secheresse et l'insecurite alimentaire dans les regions riveraines et lacustres en aval des barrages. Il semble que les barrages en Ethiopie seraient egalement vulnerables a des taux eleves d'erosion du sol et aux tremblements de terre. Consequemment, le programme actuel de construction de barrages a grande echelle en Ethiopie necessite des recherches approfondies afin d'ameliorer notre comprehension des effets negatifs collateraux des projets et de guider la localisation, la conception et la mise en place de programmes de prevention et de remediation. Mots-cles: developpement des ressources hydrauliques, environnement, securite alimentaire, maladies transmises par vecteurs, Ethiopie., Background Only 15% of the Ethiopian population has access to the national electricity network. This low percentage is due to inadequate power generation and electricity distribution. Approximately 80% of Ethiopians [...]

This paper presents the results of microgeographical studies of human water contact behavior and Schistosoma mansoni transmission levels and intensity of infection in four rural areas in Machakos District, Kenya. The relationship between intensity of infection (geometric mean egg counts) in 3502 persons aggregated in 120 household clusters and eight independent variables was investigated using straight and stepwise linear regression and mapping techniques. Results indicate that the two water contact variables, mean frequency per person and mean duration per person, as well as mean number of sites used per person, a transmission index and mean distance to the most frequently used site were the strongest predictors of geometric mean egg counts. All three distance variables were usually negatively associated with infection although intensity of infection and water contact declined relatively slowly with distance from the streams. This pattern appears to be owing to a combination of the relatively short distances, a general lack of safe alternative water sources and the use of more distant water contact sites both inside and outside the study area during periods of drought. The study of snail-to-man transmission identified number of infected snails as the major transmission variable and number of contacts as the major predictor variable. Mapping of total egg counts at the household cluster level and total number of infected snails revealed spatial association with transmission sites. All results varied considerably between study areas, owing to differences in exposure levels, transmission patterns and environmental factors. Findings are discussed in relation to the epidemiology and control of schistosomiasis and suggestions are made for further spatial studies. Key words - schistosomiasis, water contact behavior, transmission dynamics, spatial patterns, Kenya

The study of water contact patterns in rural Brazil presents unique challenges due to widely dispersed settlement patterns, the ubiquity of water contact sites, and the privatization of water resources. This study addresses these challenges by comparing the two most widely used methods of assessing water contact behaviour: direct observation and survey. The results of a 7-day direct observation of water contact were compared with water contact surveys administered 1 week after and then 1 year after the direct observation study. The direct observation study recorded a water contact rate higher than reported by other investigators (3.2 contacts per person per day); however, 75% of these contacts were for females and consisted mainly of domestic activities occurring around the household. A comparison of the frequency of water contact activities between the direct observation and the two surveys revealed several important points. First, no significant differences were found between methods for routine water contact activities (e.g. bathing), indicating that participants were able to accurately self-report some types of water contact activities. Second, significant differences were found in the recording of water contact activities that took place outside the observation area, indicating that direct observation may under-report water contact activities in areas where contact sites are dispersed widely. Third, significant differences between the direct observation and the survey method were more common for males than for females, indicating that the combination of widespread water contact sites and gender-specific division of labour may result in under-reporting of male contacts by direct observation methods. In short, despite the limitations in the recording of duration and body exposure, the survey method may more accurately record the frequency of water contact activities than direct observation methods in areas of widely dispersed water contact sites. Hence, surveys may be more suitable for the unique challenges of water contact in rural areas of Brazil. [ABSTRACT FROM AUTHOR]

A number of studies have pointed out the potential importance of the household in the transmission of schistosomiasis. The clustering of domestic activities associated with water collection, storage, and usage can result in the sharing of transmission sites and infective water contact behaviours. In this study, we employed a variance component method to estimate effects due to individual risk factors and shared residence on the variance in faecal egg counts during Schistosoma mansoni infection. A suite of covariates, which included demographic, socioeconomic, water supply, and water contact behaviour terms, contributed 15% to the variance in faecal egg counts. Shared residence alone accounted for 28% of the variance in faecal egg excretion. When both the suite of covariates and shared residence were considered in the same model, shared residence still contributed 22% to the variance in infection intensity. These results point to the importance of shared residence as a means of capturing the complex interrelationship between shared demographic, socioeconomic, physical environmental, and behavioural factors that influence transmission of schistosomiasis at the household level. [ABSTRACT FROM AUTHOR]

A review and mapping of fluoride test data for 270 water sources in 126 communities and examination of the literature of fluorosis distribution in Ethiopia show that this health problem extends beyond the Rift Valley into some highland communities. Fluoride concentrations above 5.0 mg/l in the Rift Valley were found mostly in hot springs (100% of all sources), lakes (78%), shallow wells (54%) and boreholes (35%) and the lowest concentrations (below 1.5 mg/l) in springs and rivers. Analysis of hydrochemical, economic and demographic factors in the spatial distribution of high-fluoride domestic water sources indicates that the fluorosis problem has become more serious in the Rift Valley in recent decades. Considerable spatial variation in the occurrence of fluoride, even within the same communities, and the presence of some low-fluoride water sources in the Rift Valley offer possibilities for geochemical exploration for acceptable domestic sources. The defluoridation programme in the Wonji irrigation scheme illustrates the problems faced by a large rural community in a developing country. Possibilities for control are examined and recommendations made for the development of alternative water sources and promising defluoridation methods using locally available materials and technologies. [ABSTRACT FROM AUTHOR]

Discusses health and medical care in Ethiopia. Brief history of Ethiopia; Development and structure of the health care system; Funding; Medical training and remuneration; Hospitals; Other health care facilities; Paramedical services; Access to health care; Health and disease--infectious and noninfectious; Conclusions.

A total of 256 sites in 11 habitats were surveyed for Biomphalaria in Melquiades rural area (State of Minas Gerais) in August and November 1999 and in March 2000. Of the 1,780 Biomphalaria collected, 1,721 (96.7%) were B. glabrata and 59 (3.3%) B. straminea. Snails were found in all habitats except in wells, with the largest mean numbers in tanks, seepage ponds and canals, and the smallest numbers in springs, rice fields and fishponds. People's knowledge of the occurrence of Biomphalaria at the collection sites and the presence of Biomphalaria ova were strongly correlated with the occurrence of snails, and distance between houses and collection sites, as well as water velocity were inversely correlated with Biomphalaria occurrence (p < 0.001). The strongest predictor o f Biomphalaria occurrence was the presence of tilapia fish in fishponds. Fourteen Biomphalaria (0.8% of all snails) found at 6 sites were infected with Schistosoma mansoni. Suggestions are made for the utilization of local people's knowledge in snail surveys and further studies are recommended on the possible use of tilapia for biological control of Biomphalaria in fishponds, as well as modeling of S. mansoni transmission and reinfection.