43 results on '"Damte D"'
Search Results
2. Inflammatory responses to mycoplasma hyopneumoniae in murine alveolar macrophage cell lines
- Author
-
Damte, D.
- Published
- 2011
3. Traditional systems and development interventions in LVIA experience in Moyale, pastoral area of Southern Ethiopia
- Author
-
Cassini, Rudi, Guerretta, L, Damte, D, Morbin, D, and Pallottino, M.
- Published
- 2008
4. Evaluation and characterization of a novel probioticLactobacillus pentosusPL11 isolated from Japanese eel (Anguilla japonica) for its use in aquaculture
- Author
-
Lee, J.-S., primary, Damte, D., additional, Lee, S.-J., additional, Hossain, M.-A., additional, Belew, S., additional, Kim, J.-Y., additional, Rhee, M.-H., additional, Kim, J.-C., additional, and Park, S.-C., additional
- Published
- 2014
- Full Text
- View/download PDF
5. Inflammatory responses toMycoplasma hyopneumoniaein murine alveolar macrophage cell lines
- Author
-
Damte, D, primary, Lee, S-J, additional, Hwang, M-H, additional, Gebru, E, additional, Choi, M-J, additional, Lee, J-S, additional, Cheng, H, additional, and Park, S-C, additional
- Published
- 2011
- Full Text
- View/download PDF
6. Evaluation and characterization of a novel probiotic Lactobacillus pentosus PL11 isolated from Japanese eel ( Anguilla japonica) for its use in aquaculture.
- Author
-
Lee, J.‐S., Damte, D., Lee, S.‐J., Hossain, M.‐A., Belew, S., Kim, J.‐Y., Rhee, M.‐H., Kim, J.‐C., and Park, S.‐C.
- Subjects
- *
LACTOBACILLUS , *PROBIOTICS , *ANGUILLA japonica , *AQUACULTURE industry , *DIGESTIVE enzymes , *EDWARDSIELLA tarda - Abstract
In the present study, a potential Lactobacilli probiotics were isolated from Japanese eels ( Anguilla japonica) and characterized and evaluated for their possible use in eel farming. Sixteen Lactobacilli were isolated from intestines of Japanese eels, using selective media. The lactobacilli strains (represented as PL1 to PL16) were screened by their ability to produce digestive enzyme. Among these, three strains ( PL11, PL13 and PL16) producing four digestive enzymes (amylase, cellulase, protease and phytase) simultaneously were characterized further using API ZYM kit. From these, PL11 ( Lactobacillu ( L.) pentosus) was identified as potential probiotics candidate producing 15 enzymes among 20 tested. Further examination of biological activities of PL11 revealed tolerance against pH, artificial bile juice and antibacterial activity against several fish pathogenic bacteria. The in vitro competitive exclusion assay also revealed 88.4% reduction in adhesion of fish pathogen ( Edwardsiella tarda) by PL11 to host intestinal mucus. In vitro incubation of Japanese eel foregut with Baclight-labelled PL11 showed colonization of the enterocyte surface by confocal and scanning electron microscopy. In summary, PL11 isolated from eels could serve as a potential probiotics with acid and bile tolerance, production of digestive enzymes, antibacterial activity and inhibition of fish pathogen adhesion to intestinal mucus. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
7. Psychology of Religion in Moscow University: Troitsky, Grot, Astaf’ev
- Author
-
Damte David
- Subjects
Russian philosophy ,philosophy or religion ,psychology of religion in Russia ,Troitsky ,Grot ,Astaf'ev ,religious feeling ,religious faith ,Religion (General) ,BL1-50 - Abstract
There were two main types of philosophy and psychology of religion in Russia in the late 19th and the early 20th centuries: the fi rst developed in theological academies, while the second — in universities. In this article we explore the latter tradition, addressing the ideas represented in works of Troitsky (1835–1899), Grot (1852–1899) and Astaf†ev (1846–1893). These prominent Russian philosophers worked in Moscow University and were members of Moscow Psychological Society, their works played an important role in the development of philosophy, as well as psychology, which was still at the early stage of its development at the time. We discuss the connection between their general philosophical ideas and their approach to analysis of religion with emphasis on psychological aspects of their conceptions, particularly related to notions of religious feelings and psychological functions of religion as well as their original views on evolution of religious beliefs. Three thinkers whose ideas are examined in the article are unanimous in their understanding of inner experience as the most important (although not the only one) source of religious faith and beliefs. At the same time, the important diff erence between those authors is related to their understanding of sources and forms of manifestation of inner experience. While Troitsky describes association and abstraction as the most important conditions of development of religious consciousness, Grot focuses on feelings as a source of religious worldview, and Astaf'ev develops an original conception of will as a constituent element of religious consciousness.
- Published
- 2016
- Full Text
- View/download PDF
8. Intestinal parasitic infections in HIV/AIDS and HIV seronegative individuals in a teaching hospital, Ethiopia
- Author
-
Hailemariam, G., Kassu, A., Gemeda Abebe, Abate, E., Damte, D., Mekonnen, E., and Ota, F.
9. Adherence to diabetic foot care recommendations and associated factors among people with diabetes in Eastern Ethiopia: a multicentre cross-sectional study.
- Author
-
Sertsu A, Nigussie K, Lami M, Bekele Dechasa D, Abdisa L, Eyeberu A, Dereje J, Mohammed A, Kassa Taffese O, Bete T, Adugna D, Negash A, Goshu AT, Debella A, and Letta S
- Subjects
- Humans, Adult, Cross-Sectional Studies, Ethiopia epidemiology, Comorbidity, Obesity complications, Obesity epidemiology, Obesity therapy, Diabetic Foot epidemiology, Diabetic Foot prevention & control, Diabetes Mellitus epidemiology, Diabetes Mellitus therapy
- Abstract
Objective: This study aimed to determine the level of adherence to foot care recommendations and associated factors among people with diabetes on follow-up in public hospitals in Eastern Ethiopia., Setting: An institutional-based cross-sectional study was conducted in public hospitals found in Eastern Ethiopia from 25 February to 25 March 2022., Participants: A total of 419 patients with chronic diabetes who visited diabetic clinics in public hospitals in Eastern Ethiopia for follow-up were included., Main Outcome Measure: The level of adherence to diabetic foot care recommendations and associated factors., Results: The findings indicated that 44.3% (95% CI: 39.3, 49.0) of people with diabetes had inadequate adherence to diabetic foot care recommendations. Age between 28-37 (adjusted OR (AOR)=1.10; 95% CI: 1.27, 5.63) and 38-47 years (AOR=2.19; 95% CI: 2.74, 8.89), rural residence (AOR=1.71; 95% CI: 1.15, 2.57), absence of comorbidity (AOR=2.22; 95% CI:1.34, 5.14), obesity (AOR=1.43; 95% CI: 1.10, 5.05) and inadequate foot care knowledge (AOR=2.10; 95% CI: 1.52, 4.35) were factors significantly associated with inadequate adherence to diabetic foot care recommendations., Conclusion: More than two-fifths of people with diabetes had inadequate adherence to diabetic foot care recommendations. Younger age, rural residence, absence of comorbidity, obesity and inadequate foot care knowledge were significantly associated with inadequate adherence to diabetic foot care recommendations. It is very essential to educate people with diabetes about the importance of foot care recommendations in preventing and delaying the risks of foot-related problems and complications., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2023. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
- Published
- 2023
- Full Text
- View/download PDF
10. Cancellation of elective surgery and associated factors among patients scheduled for elective surgeries in public hospitals in Harari regional state, Eastern Ethiopia.
- Author
-
Adugna D, Worku T, Hiko A, Dheresa M, Letta S, Sertsu A, and Kibret H
- Abstract
Background: Canceling elective surgeries is a significant problem in many hospitals leading to patient dissatisfaction, increased costs, and emotional trauma for patients and their families. Despite this, there is limited information about the cancellation of elective surgeries in Ethiopia, mainly in the study area., Objective: This study aimed to assess the magnitude of cancellation and associated factors among patients scheduled for elective surgeries in public hospitals in the Harari Regional State, Eastern Ethiopia, from 1 August to 30 August 2021., Methods: A hospital-based cross-sectional study was conducted on 378 patients scheduled for elective surgeries. Data were gathered using a non-random sequential sampling approach. In addition, a structured face-to-face interviewer-administered questionnaire was employed. The gathered information was input into Epidata version 3.1 and then exported to Statistical Package for Social Software version 26. To find the variables associated with the cancellation of elective surgeries, binary and multi-variable logistic regression analyses were conducted. In the binary analysis, all variables with a p -value of less than 0.25 were included in the multivariable analysis. Finally, a 0.05 p -value with a 95% confidence interval and an adjusted odds ratio was used to declare a significant association., Results: This study included 378 patients scheduled for elective surgeries. Among those, 35.2% of the surgeries were canceled (95% confidence interval: 29.4-39.6). Being female (adjusted odds ratio: 2.46; 95% confidence interval: 1.44-4.203), lack of formal education (adjusted odds ratio: 2.03; 95% confidence interval: 1.15-3.58), place of residence (adjusted odds ratio: 1.70; 95% confidence interval: 1.03-2.81), increase in blood pressure (adjusted odds ratio: 5.09; 95% confidence interval:1.90-13.59), and ophthalmologic surgery (adjusted odds ratio: 3.76; 95% confidence interval: 1.41-10.0) were factors associated with the cancellation of elective surgeries., Conclusion: In this study, nearly one third of scheduled elective surgery was canceled. The primary contributing variables to the surgery cancellations were being female, lack of formal education, place of residence, ophthalmologic surgery, and increased blood pressure. Therefore, timely evidence-based reporting through the supervision team was advised to decrease cancellations., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Adugna, Worku, Hiko, Dheresa, Letta, Sertsu and Kibret.)
- Published
- 2023
- Full Text
- View/download PDF
11. Spatial exploration of non-resilience to food insecurity, its association with COVID-19 and household coping strategies in East Gojjam districts, Northwest Ethiopia, 2020.
- Author
-
Negesse A, Woyraw W, Temesgen H, Teka Y, Yismaw L, Akalu TY, Deml YA, Sume BW, Negesse Y, Taddege T, Kidie WD, Teym A, Asmare B, Hune Y, Damte D, Getaneh T, Gebre T, Tilahun B, Tenagne A, Tegegne E, Birhanu MY, Mekonen H, Shiferaw M, Kassahun W, and Desalegn BB
- Subjects
- Adaptation, Psychological, Cross-Sectional Studies, Ethiopia epidemiology, Family Characteristics, Food Insecurity, Humans, Male, Pandemics, Socioeconomic Factors, COVID-19 epidemiology, Food Supply
- Abstract
The coronavirus disease-2019 (COVID-19) pandemic has posed a significant multifaceted threat to the global community. Ethiopia, as a Sub-Saharan African country, is suffering from chronic food insecurity, and the emergence of such a pandemic will exacerbate the situation. As a result, this study investigated the spatial variation of non-resilience to food insecurity, its relationship with COVID-19, and household coping strategies to become resilient in the long run among households in the East Gojjam Zone of Northwest Ethiopia. From September 22 to December 24, 2020, an agro-ecological-based cross-sectional study of 3532 households was conducted to assess the spatial distribution and associated factors of non-resilience to household food insecurity. The enumeration areas (EAs) and households were chosen using a multistage sampling technique. Data were gathered using a semi-structured questionnaire and checklist using an Android device loaded with an Open Data Kit (ODK) template. Binary logistic regression was used to identify the specific factors associated with household non-resilience to food insecurity. A thematic analysis was conducted to investigate the opportunities and challenges of resilience for household food insecurity. Nearly two-thirds (62.5%) of the households were farmers, 67.9% lived in rural areas, and nearly three-quarters (73.8%) earned less than or equal to ETB 2100 per month. Males headed more than four-fifths of the households (81.7%). We found that nearly two-thirds of the households (60.02%), 95% CI 58.40, 61.64) were food insecure. After bivariate logistic regression, we found that households who were divorced (AOR = 2.54 (1.65, 3.87)), daily laborers (AOR = 2.37 (1.15, 4.87)), government employees (AOR = 2.06 (1.05, 4.05)), residents of highland and hot areas (AOR = 11.5 (5.37, 16.77)) and lowland areas (AOR = 1.35 (1.02, 3.15)) were frustrated by COVID-19 (AOR = 1.23 (1.02, 1.50)) and price inflation (1.89 (AOR = 1.42, 2.56))) were at higher odds of being non-resilient to household food insecurity at a 95% confidence level. Geospatial hot spot analysis revealed that Kurar kebele (the lowest government administrative unit) in Dejen District and Debre Markos town were the red-hotspot areas of household non-resilience to food insecurity. Less than a quarter of the households attempted to cope with food insecurity by adjusting their food consumption, while more than 60% of the households chose none of the coping strategies tested. According to the thematic analysis, the degree of poverty (lack of asset ownership), the COVID-19 pandemic, farm decreased variety, and low crop productivity were identified as challenges to coping with the hardship of resilience to food insecurity. During the COVID-19 pandemic and public emergency, the proportion of households that were unprepared for food insecurity reached its peak. It was recognized that a segment of the population with low economic capacity was more vulnerable to food insecurity and less resilient. Tough developmental gains will be undermined in this case. As a result, each responsible body and stakeholder should develop and implement solid corrective plans for the local context., (© 2022. The Author(s).)
- Published
- 2022
- Full Text
- View/download PDF
12. Prevalence of asymptomatic visceral leishmaniasis in human and dog, Benishangul Gumuz regional state, Western Ethiopia.
- Author
-
Bejano S, Shumie G, Kumar A, Asemahagn E, Damte D, Woldie S, Mulugeta A, Manaye N, Genetu A, Gadisa E, and Mamo G
- Subjects
- Adolescent, Animals, Antigens, Protozoan genetics, Child, Child, Preschool, Cross-Sectional Studies, Dogs parasitology, Ethiopia epidemiology, Female, Humans, Leishmania donovani genetics, Leishmania donovani pathogenicity, Leishmaniasis, Visceral blood, Leishmaniasis, Visceral diagnosis, Leishmaniasis, Visceral transmission, Male, Pets parasitology, Prevalence, Risk Factors, Skin Tests, Surveys and Questionnaires, Young Adult, Asymptomatic Diseases epidemiology, Leishmania donovani isolation & purification, Leishmaniasis, Visceral epidemiology
- Abstract
Background: The Benishangul-Gumuz region is an important development corridor in Ethiopia. Large-scale projects such as the Great Renaissance Dam, mining and agriculture have entailed huge environmental modifications and settlement pattern changes. There is no detailed epidemiological information on visceral leishmaniasis (VL) in the region., Materials and Methods: A cross-sectional study was carried out to assess the epidemiology and risk factors associated with Leishmania infection. A leishmanin skin test (LST) was done for 1342 participants, and for 253 of them rK39 and DAT were carried out. Thirty-six dogs owned by households with LST-positive member(s) were rK39 and DAT tested. A pretested questionnaire was used to capture individual and household characteristics., Results: Of the 89.2% (1197/1342) who availed themselves of the LST reading, 6.0% were positive. The rk39 and DAT positivity among the 253 tested were 3.2% and 5.9%, respectively. In dogs, positivity rates by rK39 and DAT were 13.9% and 5.6%, respectively. Of the household and individual risk factors, presence of a dog in the household (P = 0.005), male sex (0.003), residence woreda (0.000) and occupation (0.023) showed a strong positive association with LST positivity. Individuals who lived in households that had dogs were 2.6 times more likely to be LST positive (AOR = 2.6; 95% CI = 1.54, 4.40). Being female decreased the probability of being LST positive by 0.38 times (AOR = 0.38; 95% CI = 0.20, 0.72). People living in Guba and Kurmuk had 4.7 (AOR = 4.74, 95% CI 1.83, 12.31) and 5.9 (AOR = 5.85, 95% CI 2.27, 15.09) times more risk of being infected., Conclusions: We demonstrated the presence of active VL transmission in the areas. Thus, we underline the need to establish the responsible vector(s) and reservoir(s) for comprehensive early containment plans to prevent potentially harmful public health and economic consequences.
- Published
- 2021
- Full Text
- View/download PDF
13. Clinical, parasitological and molecular profiles of Cutaneous Leishmaniasis and its associated factors among clinically suspected patients attending Borumeda Hospital, North-East Ethiopia.
- Author
-
Bisetegn H, Zeleke AJ, Gadisa E, Shumie G, Damte D, Fenta T, Behaksra S, and Bayih AG
- Subjects
- Adolescent, Adult, Aged, Child, Child, Preschool, Cross-Sectional Studies, DNA, Protozoan analysis, Ethiopia epidemiology, Female, Humans, Leishmaniasis, Cutaneous diagnosis, Male, Middle Aged, Polymerase Chain Reaction, Polymorphism, Restriction Fragment Length, Prevalence, Young Adult, Leishmania genetics, Leishmania isolation & purification, Leishmaniasis, Cutaneous epidemiology, Leishmaniasis, Cutaneous parasitology
- Abstract
Background: Cutaneous leishmaniasis is one of the most neglected tropical diseases increasing in its public health importance. In Ethiopia over 28 million people are living at risk of infection., Method: Institution based cross-sectional study was conducted at Borumeda Hospital from February to May 2019. A total 205 leishmaniasis suspected patients were included by systematic random sampling technique. Socio demographic characteristics were collected using pre-tested questionnaires. Parasitological investigation was done from skin slit sample by using Geimsa staining method. Species identification was done by PCR-RFLP. Data were entered in to EpiData version 3.1 and analyzed using SPSS version 20 software. P-value of ≤ 0.05 was considered as statistically significant., Result: A total of 205 participants consisting 59% male and 41% female included in this study. The mean age (±SD) of the study participants was 31.9 (±14.29). The overall prevalence of cutaneous leishmaniasis was 22.4% (46/205). The prevalence in males (13.7%) was higher than in females (8.8%). It was more prevalent in the age group 16-45years old (15.6%). Clinically, 60% of patients' hade single lesion with 1.55 average number of lesions. About 30.7% of patients' had indurated plaque type of lesion. Most of the lesions were found on head and face (59%). House near to farmland, presence of hyrax in the village and presence of other cutaneous leishmaniasis cases in the neighborhood were independent predicator of cutaneous leishmaniasis prevalence. L.aethopica was found to be the etiologic agent of cutaneous leishmaniasis in the study participants., Conclusion: The prevalence of cutaneous leishmaniasis was 22.4%, this alerts the need of intervention. It is statistically associated with house near to farm land, presence of other cutaneous leishmaniasis cases in the neighborhood and presence of hyrax in village. Head and face were the most common sites of lesion., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2020
- Full Text
- View/download PDF
14. Validation of in-house liquid direct agglutination test antigen: the potential diagnostic test in visceral Leishimaniasis endemic areas of Northwest Ethiopia.
- Author
-
Ayelign B, Jemal M, Negash M, Genetu M, Wondmagegn T, Zeleke AJ, Worku L, Bayih AG, Shumie G, Behaksra SW, Fenta T, Damte D, Yeshanew A, and Gadisa E
- Subjects
- Adolescent, Adult, Diagnostic Tests, Routine, Endemic Diseases, Ethiopia epidemiology, Female, Humans, Leishmaniasis, Visceral immunology, Male, Middle Aged, Sensitivity and Specificity, Young Adult, Agglutination Tests methods, Antibodies, Protozoan blood, Antigens, Protozoan immunology, Leishmania donovani immunology, Leishmaniasis, Visceral diagnosis
- Abstract
Background: Visceral leishmaniasis in Ethiopia is a re-emerging threat to public health, with increased geographical distribution and number of cases. It is a fatal disease without early diagnosis and treatment; thus, the availability of affordable diagnostic tools is crucial. However, due to delays caused by import regulations, procurement and late delivery of imported test kits, accessibility remains a problem in the control program. Therefore, we aimed to produce and evaluate the performance of an in-house liquid (AQ) direct agglutination test (DAT) antigen., Result: The AQ-DAT was produced at the Armauer Hansen Research Institute, using Leishmania donovani strain (MHOM/ET/67/L82). Sera from 272 participants; 110 microscopically confirmed cases of VL, 76 apparently healthy and 86 patients who had infectious disease other than VL were tested with AQ-DAT, and standard kits: Freeze-dried DAT (FD-DAT) and rK39. Taking microscopy as a gold standard; the sensitivity and specificity of the AQ-DAT were 97.3 and 98.8%, respectively. It had high degrees of agreement (k > 0.8), with a significant (P < 0.05) correlation compared to microscopy, FD-DAT, and rK39., Conclusion: Although further standardization is required, the in-house AQ-DAT could improve diagnostic accessibility, minimize intermittent stock outs and strengthen the national VL control program.
- Published
- 2020
- Full Text
- View/download PDF
15. Serological evidence for a decline in malaria transmission following major scale-up of control efforts in a setting selected for Plasmodium vivax and Plasmodium falciparum malaria elimination in Babile district, Oromia, Ethiopia.
- Author
-
Keffale M, Shumie G, Behaksra SW, Chali W, Hoogen LLVD, Hailemeskel E, Mekonnen D, Chanyalew M, Damte D, Fanta T, Ashine T, Chali S, Tetteh KKA, Birhanu DD, Balcha TT, Aseffa A, Drakeley C, Tessema TS, Adamu H, Bousema T, Gadisa E, and Tadesse FG
- Subjects
- Adolescent, Adult, Child, Child, Preschool, Cross-Sectional Studies, Ethiopia epidemiology, Female, Humans, Malaria, Falciparum transmission, Malaria, Vivax transmission, Male, Middle Aged, Plasmodium falciparum isolation & purification, Plasmodium vivax isolation & purification, Prevalence, Seroepidemiologic Studies, Young Adult, Malaria, Falciparum epidemiology, Malaria, Vivax epidemiology
- Abstract
Background: Following successful malaria control during the last decade, Ethiopia instituted a stepwise malaria elimination strategy in selected low-transmission areas., Methods: Cross-sectional surveys were conducted in Babile district, Oromia, Ethiopia from July to November 2017 to evaluate malaria infection status using microscopy and nested polymerase chain reaction (nPCR) and serological markers of exposure targeting Plasmodium falciparum and Plasmodium vivax apical membrane antigen-1 (AMA-1)., Results: Parasite prevalence was 1.2% (14/1135) and 5.1% (58/1143) for P. falciparum and 0.4% (5/1135) and 3.6% (41/1143) for P. vivax by microscopy and nPCR, respectively. Antibody prevalence was associated with current infection by nPCR for both P. falciparum (p<0.001) and P. vivax (p=0.014) and showed an age-dependent increase (p<0.001, for both species). Seroconversion curves indicated a decline in malaria exposure 15 y prior to sampling for P. falciparum and 11.5 y prior to sampling for P. vivax, broadly following malaria incidence data from district health offices, with higher antibody titres in adults than children for both species., Conclusions: Malaria transmission declined substantially in the region with continuing heterogeneous but measurable local transmission, arguing in favour of continued and tailored control efforts to accelerate the progress towards elimination efforts., (© The Author(s) 2019. Published by Oxford University Press on behalf of Royal Society of Tropical Medicine and Hygiene. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
- Published
- 2019
- Full Text
- View/download PDF
16. Anthropometric Improvement among HIV Infected Pre-School Children Following Initiation of First Line Anti-Retroviral Therapy: Implications for Follow Up.
- Author
-
Tekleab AM, Tadesse BT, Giref AZ, Shimelis D, and Gebre M
- Subjects
- Anti-HIV Agents pharmacology, Child, Preschool, Female, Follow-Up Studies, HIV Infections immunology, Humans, Male, Treatment Outcome, Anthropometry, Anti-HIV Agents therapeutic use, HIV Infections drug therapy
- Abstract
Background: Antiretroviral therapy (ART) is a lifesaving intervention for HIV infected children. There is a scarcity of data on immunological recovery and its relation with growth indicators among HIV infected young children. The current study aims to assess the pattern of anthropometric Z-score improvement following initiation of first-line ART among under-five children and the relationship between anthropometric Z-score improvement and immunologic recovery., Methods: We included under-five children who were on first-line ART at five major hospitals in Addis Ababa, Ethiopia. We measured anthropometry and collected clinical and laboratory data at follow up, and we retrieved clinical and anthropometric data at ART initiation from records. Z-scores for each of the anthropometric indices were calculated based on WHO growth standards using ENA for SMART 2011 software. Linear regression was used to assess the relationship between time on ART and anthropometric Z-score improvement; and the relationship between anthropometric Z-score improvement and immunologic recovery. Multiple linear regression was used to assess the independent predictors of anthropometric Z-score change., Results: The median age of the participants was 4.1 (Interquartile range (IQR): 3.3-4.9) years. More than half (52.48%) were female. The median duration of follow up was 1.69 (IQR: 1.08-2.63) years. There was a significant improvement in all anthropometric indices at any follow up after initiation of first-line ART (underweight; 39.5% vs16.5%, stunting; 71.3% vs 62.9% and wasting; 16.3% vs 1.0%; p-value< 0.0001). There was an inverse relationship between improvement in weight for age Z-score (WAZ) and duration of ART (R2 = 0.04; F (1, 158); p = 0.013). Height for age Z-score (HAZ) both at the time of ART initiation and follow up has a positive linear relationship with CD4 percentage at follow up (Coef. = 1.92; R2 = 0.05; p-value = 0.002). Duration on ART (Std. Err. = 0.206, t = -1.99, p-value = 0.049) and level of maternal education (Std. Err. = 0.290, t = 2.64, p-value = 0.009) were the only independent predictors of the change in WAZ and change in HAZ at any follow up visit respectively., Conclusion: There was a significant improvement in all anthropometric indices at any follow-up after initiation of first-line ART among under-five children. HAZ was linearly related with immunologic recovery following ART initiation. The findings indicate that anthropometric indices could be taken as proxy indicators of immunologic recovery for under-five children., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2016
- Full Text
- View/download PDF
17. High Gastrointestinal Colonization Rate with Extended-Spectrum β-Lactamase-Producing Enterobacteriaceae in Hospitalized Patients: Emergence of Carbapenemase-Producing K. pneumoniae in Ethiopia.
- Author
-
Desta K, Woldeamanuel Y, Azazh A, Mohammod H, Desalegn D, Shimelis D, Gulilat D, Lamisso B, Makonnen E, Worku A, Mannerqvist K, Struwe J, Aspevall O, and Aklillu E
- Subjects
- Adolescent, Adult, Aged, Child, Child, Preschool, Cross-Sectional Studies, Enterobacteriaceae classification, Enterobacteriaceae drug effects, Enterobacteriaceae Infections epidemiology, Escherichia coli enzymology, Escherichia coli isolation & purification, Ethiopia epidemiology, Female, Hospitalization, Humans, Infant, Infant, Newborn, Klebsiella pneumoniae enzymology, Klebsiella pneumoniae isolation & purification, Male, Middle Aged, Young Adult, Bacterial Proteins metabolism, Drug Resistance, Multiple, Bacterial, Enterobacteriaceae isolation & purification, Enterobacteriaceae Infections microbiology, Gastrointestinal Tract microbiology, beta-Lactamases metabolism
- Abstract
We investigated the gastrointestinal colonization rate and antibiotic resistance patterns of Extended-Spectrum Beta-Lactamase (ESBL)- producing Escherichia coli and Klebsiella pneumoniae in hospitalized patients admitted at Ethiopia's largest tertiary hospital. Fecal samples/swabs from 267 patients were cultured on chrome agar. ESBL. Bacterial species identification, verification of ESBL production and antibiotic susceptibility testing were done using Vitek 2 system (bioMérieux, France). Phenotype characterization of ESBL-E.coli and ESBL- K.pneumoniae was done using Neo-Sensitabs™. ESBL positivity rate was much higher in K. pneumoniae (76%) than E. coli (45%). The overall gastrointestinal colonization rate of ESBL producing Enterobacteriaceae (ESBL-E) in hospitalized patients was 52% (95%CI; 46%-58%) of which, ESBL-E. coli and K.pneumoniae accounted for 68% and 32% respectively. Fecal ESBL-E carriage rate in neonates, children and adults was 74%, 59% and 46% respectively. Gastrointestinal colonization rate of ESBL-E.coli in neonates, children and adults was 11%, 42% and 42% respectively. Of all E. coli strains isolated from adults, children and neonates, 44%, 49% and 22% were ESBL positive (p = 0.28). The prevalence of ESBL-K.pneumoniae carriage in neonates, children and adults was 68%, 22% and 7% respectively. All K. pneumoniae isolated from neonates (100%) and 88% of K. pneumoniae isolated from children were ESBL positive, but only 50% of K.pneumoniae isolated from adults were ESBL positive (p = 0.001). Thirteen patients (5%) were carriers of both ESBL-E.coli and ESBL-KP. The overall carrier rate of ESBL producing isolates resistant to carbapenem was 2% (5/267), all detected in children; three with E.coli HL cephalosporinase (AmpC), resistant to ertapenem and two with K. pneumoniae Carbapenemase (KPC) resistant to meropenem, ertapenem and impenem. We report a high gastrointestinal colonization rate with ESBL-E and the emergence of carbapenems-resistant K. pneumoniae in Ethiopia. Urgent implementation of infection control measures, and surveillance are urgently needed to limit the spread within healthcare facilities and further to the community., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2016
- Full Text
- View/download PDF
18. PATTERN AND OUTCOME OF RENAL DISEASES IN HOSPITALIZED CHILDREN IN TIKUR ANBESSA SPECIALIZED TEACHING HOSPITAL, ADDIS ABABA, ETHIOPIA.
- Author
-
Mola K and Shimelis D
- Subjects
- Acute Kidney Injury epidemiology, Acute Kidney Injury mortality, Acute Kidney Injury physiopathology, Adolescent, Bladder Exstrophy epidemiology, Bladder Exstrophy mortality, Bladder Exstrophy physiopathology, Child, Child, Preschool, Cross-Sectional Studies, Ethiopia epidemiology, Female, Glomerulonephritis epidemiology, Glomerulonephritis mortality, Glomerulonephritis physiopathology, Hospitalization, Hospitals, Teaching, Humans, IgA Vasculitis epidemiology, IgA Vasculitis mortality, IgA Vasculitis physiopathology, Infant, Infant, Newborn, Kidney Diseases mortality, Kidney Diseases physiopathology, Kidney Neoplasms epidemiology, Kidney Neoplasms mortality, Kidney Neoplasms physiopathology, Lupus Nephritis epidemiology, Lupus Nephritis mortality, Lupus Nephritis physiopathology, Male, Mortality, Nephrotic Syndrome epidemiology, Nephrotic Syndrome mortality, Nephrotic Syndrome physiopathology, Prune Belly Syndrome epidemiology, Prune Belly Syndrome mortality, Prune Belly Syndrome physiopathology, Recovery of Function, Renal Insufficiency, Chronic epidemiology, Renal Insufficiency, Chronic mortality, Renal Insufficiency, Chronic physiopathology, Retrospective Studies, Urinary Tract Infections epidemiology, Urinary Tract Infections mortality, Urinary Tract Infections physiopathology, Urogenital Abnormalities epidemiology, Urogenital Abnormalities mortality, Urogenital Abnormalities physiopathology, Urolithiasis epidemiology, Urolithiasis mortality, Urolithiasis physiopathology, Wilms Tumor epidemiology, Wilms Tumor mortality, Wilms Tumor physiopathology, Kidney Diseases epidemiology
- Abstract
Background: Renal diseases are major causes of morbidity and mortality in pediatric practice. Pediatric patients with renal disease, especially younger ones may present with nonspecific signs and symptoms unrelated to the urinary tract. Unexplained fever or failure to thrive may be the only manifestation. Most children with renal diseases in our hospital arrive very late either because of inadequate health awareness among the parents or failure of recognizing the symptoms of renal diseases at a lower health care level. This review will highlight the symptoms of renal diseases at presentation and outcomes of treatment in children in a major referral hospital., Methods: A cross-sectional retrospective chart review was done over a period of 3 years (June, 2012 to May, 2015) in 381 admitted children (Birth-17 years) at Tikur Anbessa Specialized Teaching Hospital in Addis Ababa, Ethiopia., Results: Out of 14521 pediatric ward admissions in the study period, kidney diseases accounted for 473 admissions in 381 children, accounting for 3.3% of all admissions. The three most common renal diseases observed were congenital anomalies of the kidney and urinary tract (CAKUT) seen in 127 children (26.8%), followed by nephrotic syndrome in 80 children 16.9% and acute glomerulonephritis in 58 children (12.2%). Other renal diseases observed were urinary tract infection 8.0%, urolithiasis 6.7%, Wilm’s tumor 6.3%, acute kidney injury 4.2% and chronic kidney disease 4.0%. Other less frequently detected diseases were bladder exstrophy, lupus nephritis, Henock shonlein Purpura nephritis and prune-belly syndrome. Out of 381 children 207 (54.3%) recovered normal renal function, 20(5.2%) remained with proteinuria, 13(3.4%) progressed to chronic kidney disease and 11(2.9%) died. Sixty one nephrotic children (76.3%) achieved remission but 17 children (21.3%) remained with proteinuria; one steroid resistant child died of end stage renal disease. Ten children (2.6%) with different renal diseases were lost to follow-up and 5 (1.3%) discharged against medical advice., Conclusions: This data reflects that many of the renal diseases are preventable or potentially curable. Therefore, improvement of pediatric renal services and training of health workers would help in early detection and treatment of these conditions leading to reduction in their morbidity and mortality.
- Published
- 2016
19. Schistosoma mansoni and soil-transmitted helminths among preschool-aged children in Chuahit, Dembia district, Northwest Ethiopia: prevalence, intensity of infection and associated risk factors.
- Author
-
Alemu A, Tegegne Y, Damte D, and Melku M
- Subjects
- Animals, Child, Child, Preschool, Cross-Sectional Studies, Ethiopia epidemiology, Female, Hand Disinfection, Helminthiasis epidemiology, Humans, Infant, Intestinal Diseases, Parasitic epidemiology, Male, Prevalence, Public Health, Residence Characteristics, Risk Factors, Schistosoma mansoni isolation & purification, Shoes, Socioeconomic Factors, Soil parasitology, Water Supply, Schistosomiasis mansoni epidemiology
- Abstract
Background: Intestinal schistosomiasis and soil-transmitted helminthiasis are the major public health problems globally. Compared with any other age group, pre-school aged children and school-aged children are the most exposed. There are few studies showing the burden of intestinal schistosomiasis, and soil-transmitted helminthiasis among pre-school aged children in Ethiopia. Hence, this study aimed to assess the prevalence of schistosoma mansoni and soil-transmitted helminths and associated risk factors among preschool aged children of Chuahit and surrounding Kebeles, Northwest Ethiopia., Methods: A community based cross sectional study was conducted from February 2 to March 27 2015. Four hundred one preschool-aged children were included in the study by using two stage cluster sampling technique. Pretested structured questionnaire was employed to collected data via face-to-face interview technique. A single stool specimen was collected, and a portion of the sample was processed by Kato Katz method., Results: Of the total children, 141 (35.2 %) harbored one or more intestinal helminthes. Schistosoma mansoni was found in 45 (11.2 %) of preschool age children. Ascaris lumbricoides was the predominant isolate, 77 (19.2 %) followed by S. mansoni, 45 (11.2 %). The least parasites isolated were Tania species, 2 (0.5 %). After adjusting for other variables, being mothers who did not have the habit of washing hands after toilet (AOR = 7.3, 95%CI: 2.97-17.95), being occupationally housewife mothers (AOR = 8.9, 95%CI: 2.27-25.4), using protected spring water as a main family source of water (AOR = 3.9, 95%CI: 1.2-12.3) and child habit of not wearing shoe (AOR = 1.91, 95%CI: 1.01-3.64) were significantly associated with high prevalence of soil-transmitted helminthiasis among preschool-age children in Chuahit., Conclusion: The current study showed that relatively higher level of STH and S. mansoni among preschool-aged children in Chuahit. This finding calls for a need of public health education, promotion of women education and provision of safe water to reduce the burden of soil-transmitted intestinal helminthiasis and schistosomiaisis.
- Published
- 2016
- Full Text
- View/download PDF
20. Sonicated Protein Fractions of Mycoplasma hyopneumoniae Induce Inflammatory Responses and Differential Gene Expression in a Murine Alveolar Macrophage Cell Line.
- Author
-
Damte D, Lee SJ, Birhanu BT, Suh JW, and Park SC
- Subjects
- Animals, Bacterial Proteins isolation & purification, Cell Line, Cytokines biosynthesis, Cytokines genetics, Mice, Nitric Oxide Synthase Type II biosynthesis, Nitric Oxide Synthase Type II genetics, RNA, Messenger analysis, RNA, Messenger genetics, Real-Time Polymerase Chain Reaction, Bacterial Proteins immunology, Gene Expression drug effects, Inflammation chemically induced, Macrophages, Alveolar drug effects, Mycoplasma hyopneumoniae chemistry
- Abstract
Mycoplasma hyopneumoniae is known to cause porcine enzootic pneumonia (EP), an important disease in swine production. The objective of this study was to examine the effects of sonicated protein fractions of M. hyopneumoniae on inflammatory response and gene expression in the murine alveolar macrophage MH-S cell line. The effects of sonicated protein fractions and intact M. hyopneumoniae on the gene expression of cytokines and iNOS were assessed using RT-PCR. The Annealing Control Primer (ACP)-based PCR method was used to screen differentially expressed genes. Increased transcription of interleukin (IL)-1β, IL-6, tumor necrosis factor (TNF)-α, COX-2, and iNOS mRNA was observed after exposure to the supernatant (SPT), precipitant (PPT), and intact M. hyopneumoniae protein. A time-dependent analysis of the mRNA expression revealed an upregulation after 4 h for IL-6 and iNOS and after 12 h for IL-1β and TNF-α, for both SPT and PPT; the fold change in COX-2 expression was less. A dose- and time-dependent correlation was observed in nitrite (NO) production for both protein fractions; however, there was no significant difference between the effects of the two protein fractions. In a differential gene analysis, PCR revealed differential expression for nine gene bands after 3 h of stimulation - only one gene was downregulated, while the remaining eight were upregulated. The results of this study provide insights that help improve our understanding of the mechanisms underlying the pathogenesis of and macrophage defenses against M. hyopneumoniae assault, and suggest targets for future studies on therapeutic interventions for M. hyopneumoniae infections.
- Published
- 2015
- Full Text
- View/download PDF
21. Reference Ranges for Head Circumference in Ethiopian Children 0-2 Years of Age.
- Author
-
Amare EB, Idsøe M, Wiksnes M, Moss T, Roelants M, Shimelis D, Júlíusson PB, Kiserud T, and Wester K
- Subjects
- Child, Preschool, Cross-Sectional Studies, Ethiopia, Female, Head pathology, Humans, Hydrocephalus diagnosis, Infant, Infant, Newborn, Male, Mass Screening, Prospective Studies, Reference Values, Cephalometry, Head anatomy & histology
- Abstract
Background: Head circumference (HC) charts are important for early detection of hydrocephalus during childhood. In low-income countries where population-based HC charts are rarely available, hydrocephalus occurs more commonly than in developed countries, and is usually not diagnosed early enough to prevent severe brain damage. This applies to Ethiopia as well. The World Health Organization (WHO) has provided standard HC charts advocated for global use, but recent studies cast doubts whether these charts are equally applicable in various populations. The aim of the study was therefore to establish reference ranges for early childhood HC in Ethiopia., Methods: In this prospective, observational cross-sectional study, measurements of HC were collected from healthy children of different ethnicities between birth and 24 months, in health centers situated in 5 Ethiopian cities. Reference ranges for HC were estimated using the LMS method and compared with those recommended by WHO., Results: A total of 4019 children were included. Overall, 6.7% of boys and 7.1% of girls were above the +2 standard deviation (SD) of the WHO reference ranges, whereas the corresponding figures below -2 SD were 2.8% and 2.1%. Similarly, the +2 SD lines of the Ethiopian reference curves were considerably higher than those of the WHO growth standards, whereas the median and -2 SD lines were more comparable., Conclusions: Ethiopian HC reference ranges for children from birth to 24 months of age were found to differ significantly from those established by WHO and should correspondingly be considered as the first choice for screening for hydrocephalus in that population., (Copyright © 2015 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2015
- Full Text
- View/download PDF
22. Bacteriological Profile and Antimicrobial Susceptibility Pattern of Blood Culture Isolates among Septicemia Suspected Children in Selected Hospitals Addis Ababa, Ethiopia.
- Author
-
Negussie A, Mulugeta G, Bedru A, Ali I, Shimeles D, Lema T, and Aseffa A
- Abstract
Background: Blood stream infections are major cause of morbidity and mortality in children in developing countries. The emerging of causative agents and resistance to various antimicrobial agents are increased from time to time. The main aim of this study was to determine the bacterial agents and antimicrobial susceptibility patterns among children suspected of having septicemia., Methods: A cross sectional study involved about 201 pediatric patients (≤ 12 years) was conducted from October 2011 to February 2012 at pediatric units of TikurAnbessa Specialized Hospital and Yekatit 12 Hospital. Standard procedure was followed for blood sample collection, isolate identifications and antimicrobial susceptibility testing., Results: Among 201 study subjects 110 (54.7%) were males. Majority 147 (73.1%) of them were neonates (≤ 28 days). The mean length of hospital stay before sampling was 4.29 days. Out of the 201 tested blood samples, blood cultures were positive in 56 (27.9%).Gram negative and Gram positive bacteria constituted 29(51.8%) and 26(46.4%), respectively. The most frequent pathogen found was Staphylococcus aureus 13 (23.2%), followed by Serratia marcescens 12(21.4%), CoNS 11(19.6%), klebsiella spp 9(16%) and Salmonella spp 3(5.4%). Majority of bacterial isolates showed high resistance to Ampicillin, Penicillin, Co-trimoxazole, Gentamicin and Tetracycline which commonly used in the study area., Conclusion: Majority of the isolates were multidrug resistant. These higher percentages of multi-drug resistant emerged isolates urge us to take infection prevention measures and to conduct other large studies for appropriate empiric antibiotic choice.
- Published
- 2015
23. Hypolipidemic and Hepatic Steatosis Preventing Activities of the Wood Ear Medicinal Mushroom Auricularia auricula-judae (Higher Basidiomycetes) Ethanol Extract In Vivo and In Vitro.
- Author
-
Reza MA, Hossain MA, Damte D, Jo WS, Hsu WH, and Park SC
- Subjects
- 3T3-L1 Cells, Adipogenesis drug effects, Adipogenesis genetics, Animals, Blood Glucose drug effects, Blood Proteins drug effects, Cytotoxins pharmacology, Diet, High-Fat, Fatty Liver blood, Gene Expression drug effects, Hypolipidemic Agents isolation & purification, Lipids blood, Male, Mice, Mice, Inbred C57BL, Basidiomycota chemistry, Fatty Liver prevention & control, Hypolipidemic Agents therapeutic use, Hypolipoproteinemias prevention & control, Liver drug effects
- Abstract
Obesity, a rapidly growing threat to human health worldwide, is responsible for a large proportion of the total burden of disease. Therefore, obesity control could be a vital scheme to prevent many diseases. The aim of this study was to examine the activities and mechanism of Auricularia auricula-judae 70% ethanol extract (AAE) in preventing hypolipidemic and hepatic steatosis. A normal diet (ND) and a high-fat diet (HFD) with or without 0.1% (w/w), 0.3% (w/w), and 1% (w/w) AAE were given to male C57BL/6 mice. Plasma lipids and liver enzymes were measured and tissue sections of liver were examined. Further mechanistic studies of mouse 3T3-L1 adipocytes were performed in vitro by verifying triglyceride, glycerol, and glycerol-3-phosphate dehydrogenase activity and messenger RNA expression of adipogenic and lipogenic genes using reverse transcriptase polymerase chain reaction amplification. Body weight and adipose tissue mass were significantly reduced in mice fed an ND and a HFD plus AAE compared with mice fed an HFD. In AAE-supplemented groups, plasma lipids and liver enzymes decreased dose-dependently. AAE suppressed the expression of adipogenic/lipogenic genes (PPARγ, C/EBPα, FAS) in 3T3-L1 cells without cytotoxicity. These findings suggest that AAE may reduce the risk of hepatic steatosis by modulating plasma lipids via the regulation of adipogenic/lipogenic transcriptional factors. AAE may have interesting applications to improve plasma lipids and liver enzymes.
- Published
- 2015
- Full Text
- View/download PDF
24. Adrenocortical carcinoma in a 3% years old girl with hetro-sexual precocity.
- Author
-
Shimelis D, Tadesse A, Schneider J, and Tilahun B
- Subjects
- Child, Preschool, Female, Humans, Puberty, Precocious physiopathology, Treatment Outcome, Adrenal Cortex pathology, Adrenal Cortex surgery, Adrenal Cortex Neoplasms complications, Adrenal Cortex Neoplasms pathology, Adrenal Cortex Neoplasms physiopathology, Adrenal Cortex Neoplasms surgery, Adrenalectomy methods, Adrenocortical Carcinoma complications, Adrenocortical Carcinoma pathology, Adrenocortical Carcinoma physiopathology, Adrenocortical Carcinoma surgery, Puberty, Precocious etiology
- Abstract
Adrenocortical carcinoma is a rare neoplasm in children. Hetro-sexual precocious puberty could be the initial presentation of a rare adrenocortical neoplasm in the pediatric age group. Features of hetro-sexual precocious puberty in a girl should alert the possibility of such a rare disease. We report a rare case of adrenocortical carcinoma in a three years and six months old girl who presented with hetro-sexual precocious puberty of two years duration. Left adrenalectomy was done and histopathology revealed adrenocortical carcinoma.
- Published
- 2014
25. Pharmacokinetic interaction of enrofloxacin/trimethoprim combination following single-dose intraperitoneal and oral administration in rats.
- Author
-
Choi MJ, Yohannes SB, Lee SJ, Damte D, Kim JC, Suh JW, and Park SC
- Subjects
- Administration, Oral, Animals, Anti-Bacterial Agents blood, Area Under Curve, Chromatography, High Pressure Liquid, Drug Combinations, Drug Interactions, Enrofloxacin, Fluoroquinolones blood, Half-Life, Injections, Intraperitoneal, Male, Metabolic Clearance Rate, Rats, Rats, Sprague-Dawley, Trimethoprim blood, Anti-Bacterial Agents administration & dosage, Anti-Bacterial Agents pharmacokinetics, Fluoroquinolones administration & dosage, Fluoroquinolones pharmacokinetics, Trimethoprim administration & dosage, Trimethoprim pharmacokinetics
- Abstract
The pharmacokinetic interaction of enrofloxacin and trimethoprim was evaluated after single-dose intraperitoneal or oral co-administration in rats. Plasma concentrations of the two drugs were determined by high-performance liquid chromatography. Following intraperitoneal combination, a significant (P < 0.05) increase in mean values of plasma half-life (t 1/2) and maximum plasma concentration (C max) was observed for enrofloxacin and trimethoprim, respectively. There was a significant (P < 0.05) increase in mean values of area under the plasma drug concentration versus time from time zero to infinity (AUC0-∞) and C max between combined oral doses (10, 30 and 100 mg/kg) of both antibacterial drugs. Also, after oral conjugation a significant difference in mean values of MRT0-∞ was observed between lower (10 mg/kg) and higher (100 mg/kg) doses of both drugs. A significant increase in pharmacokinetic parameters of both drugs in combined intraperitoneal and oral doses indicated pharmacokinetic interaction of enrofloxacin and trimethoprim. Further study is recommended in other species of animals.
- Published
- 2014
- Full Text
- View/download PDF
26. Dichlormethane extract of the jelly ear mushroom Auricularia auricula-judae (higher Basidiomycetes) inhibits tumor cell growth in vitro.
- Author
-
Reza MA, Hossain MA, Lee SJ, Yohannes SB, Damte D, Rhee MH, Jo WS, Suh JW, and Park SC
- Subjects
- Antineoplastic Agents, Phytogenic chemistry, Apoptosis drug effects, Cell Line, Tumor, Cell Survival drug effects, Growth Inhibitors chemistry, Humans, Plant Extracts chemistry, Agaricales chemistry, Antineoplastic Agents, Phytogenic pharmacology, Cell Proliferation drug effects, Growth Inhibitors pharmacology, Plant Extracts pharmacology, Vegetables chemistry
- Abstract
In this study, a dichloromethane fraction (DCMF) from 70% Auricularia auricula-judae ethanol extract showed the highest level of antitumor activity compared to other solvent fractions (ethyl acetate, butanol, and water). The DCMF was found to have more potent antitumor activity against broncheoalveolar cancer (half maximal inhibitory concentration = 57.2 µg/mL) and gastric cancer cells (half maximal inhibitory concentration = 73.2 µg/mL) compared to the other solvent fractions, although all fractions inhibited the proliferation of the tumor cells in a dose-dependent manner. We further analyzed the DCMF composition by gas chromatography-coupled mass spectroscopy. Based on the results of this analysis, an antitumor active component (diazane) was identified in the DCMF. However, we found that diazane alone had a lower level of antitumor activity than the DCMF. These findings indicate that other unknown components of the DCMF also are responsible for the cytotoxic effects of DCMF against tumor cells. Semiquantitative reverse transcription polymerase chain reaction analysis demonstrated that DCMF induced cytotoxicity or tumor cell apoptosis as a result of the downregulation of Bcl-2 expression and p53 overexpression. Taken together, our study results demonstrated that the DCMF may be used as a functional additive for enhancing antioxidant activities and suppressing tumor growth in the body.
- Published
- 2014
- Full Text
- View/download PDF
27. Schistosoma mansoni Infection and Associated Determinant Factors among School Children in Sanja Town, Northwest Ethiopia.
- Author
-
Worku L, Damte D, Endris M, Tesfa H, and Aemero M
- Abstract
Background. Intestinal schistosomiasis is one of the most widespread parasitic infections in tropical and subtropical countries. Objective. To determine the prevalence of S. mansoni infection and associated determinant factors among school children in Sanja Town, northwest Ethiopia. Methods. A cross-sectional study was conducted from February to March, 2013. 385 school children were selected using stratified proportionate systematic sampling technique. Pretested questionnaire was used to collect sociodemographic data and associated determinant factors. Stool samples were examinedusing formol-ether concentration and Kato-Katz technique. Data were entered and analyzed using SPSS 20.0 statistical software. Multivariate logistic regression was done for assessing associated risk factors and proportions for categorical variables were compared using chi-square test. P values less than 0.05 were taken as statistically significant. Results. The prevalence of S. mansoni infection was 89.9% (n = 346). The overall helminthic infection in this study was 96.6% (n = 372). Swimming in the river, washing clothes and utensil using river water, crossing the river with bare foot, and fishing activities showed significant association with the occurrence of S. mansoni infection. Conclusion. Schistosoma mansoni infection was high in the study area. Therefore, mass deworming at least twice a year and health education for community are needed.
- Published
- 2014
- Full Text
- View/download PDF
28. Comparative activities of selected fluoroquinolones against dynamic populations of Actinobacillus pleuropneumoniae in an in vitro model of time-kill continuous culture experiment.
- Author
-
Damte D, Lee SJ, Yohannes SB, Hossain MA, Suh JW, and Park SC
- Subjects
- Actinobacillus pleuropneumoniae genetics, DNA, Bacterial chemistry, DNA, Bacterial genetics, Models, Theoretical, Molecular Sequence Data, Mutation, Selection, Genetic, Sequence Analysis, DNA, Actinobacillus pleuropneumoniae drug effects, Anti-Bacterial Agents pharmacology, Fluoroquinolones pharmacology
- Abstract
The aim of the current study was to demonstrate and compare the impact of different pharmacokinetics of marbofloxacin, enrofloxacin and difloxacin on their antimicrobial effects, their killing and re-growth kinetics, and the population dynamics of Actinobacillus pleuropneumoniae clinical isolates in an in vitro dynamic model. Selected clinical isolates of A. pleuropneumoniae and three fluoroquinolones at a range of simulated AUC(24)/MIC ratios of multiple doses were investigated. At the same simulated AUC(24)/MIC ratios of the three fluoroquinolones, the killing re-growth profile and I(E) values (intensity of the antimicrobial effect) revealed strain- and fluoroquinolone-specific effects. For example, a 31% lower I(E) of difloxacin was observed in AppK5 (biofilm-former) than in AppK2 (biofilm-non-former) at the same AUC(24)/MIC ratio of 120 h. In addition, losses in A. pleuropneumoniae susceptibility of both strains by the three fluoroquinolones were observed. AUC(24)/MPC ratios of 20.89 and 39.81 for marbofloxacin, 17.32 and 19.49 for enrofloxacin and 31.62 and 60.25 for difloxacin were estimated to be protective against the selection of AppK2 and AppK5 strain mutants, respectively. Integration of these in vitro data with published pharmacokinetics revealed the inadequacy of the conventional clinical doses of the three drugs to attain the above protective values for minimum biofilm eradication concentration (MBEC) and concentration to prevent growth of 90% of the mutant subpopulation (MPC(90)). In conclusion, the results suggest optimising doses could suffice for resistant mutants control, while for biofilm-forming strains combination with biofilm-disrupting agents to reduce the MBEC to achieve AUC/MBEC ratios within the possible dosing regimens is desired., (Copyright © 2013 Elsevier B.V. and the International Society of Chemotherapy. All rights reserved.)
- Published
- 2013
- Full Text
- View/download PDF
29. Putative drug and vaccine target protein identification using comparative genomic analysis of KEGG annotated metabolic pathways of Mycoplasma hyopneumoniae.
- Author
-
Damte D, Suh JW, Lee SJ, Yohannes SB, Hossain MA, and Park SC
- Subjects
- Bacterial Proteins genetics, Bacterial Proteins metabolism, Databases, Chemical, Genome, Bacterial, Humans, Molecular Sequence Annotation, Mycoplasma hyopneumoniae drug effects, Mycoplasma hyopneumoniae pathogenicity, Vaccines, Synthetic genetics, Vaccines, Synthetic metabolism, Computational Biology, Drug Design, Metabolic Networks and Pathways genetics, Mycoplasma hyopneumoniae metabolism
- Abstract
In the present study, a computational comparative and subtractive genomic/proteomic analysis aimed at the identification of putative therapeutic target and vaccine candidate proteins from Kyoto Encyclopedia of Genes and Genomes (KEGG) annotated metabolic pathways of Mycoplasma hyopneumoniae was performed for drug design and vaccine production pipelines against M.hyopneumoniae. The employed comparative genomic and metabolic pathway analysis with a predefined computational systemic workflow extracted a total of 41 annotated metabolic pathways from KEGG among which five were unique to M. hyopneumoniae. A total of 234 proteins were identified to be involved in these metabolic pathways. Although 125 non homologous and predicted essential proteins were found from the total that could serve as potential drug targets and vaccine candidates, additional prioritizing parameters characterize 21 proteins as vaccine candidate while druggability of each of the identified proteins evaluated by the DrugBank database prioritized 42 proteins suitable for drug targets., (Copyright © 2013 Elsevier Inc. All rights reserved.)
- Published
- 2013
- Full Text
- View/download PDF
30. Effects of dietary supplementation of Lactobacillus pentosus PL11 on the growth performance, immune and antioxidant systems of Japanese eel Anguilla japonica challenged with Edwardsiella tarda.
- Author
-
Lee JS, Cheng H, Damte D, Lee SJ, Kim JC, Rhee MH, Suh JW, and Park SC
- Subjects
- Anguilla microbiology, Animals, Antioxidants metabolism, Diet veterinary, Edwardsiella tarda physiology, Enterobacteriaceae Infections immunology, Enterobacteriaceae Infections microbiology, Fish Diseases microbiology, Lactobacillus isolation & purification, Probiotics administration & dosage, Anguilla growth & development, Anguilla immunology, Enterobacteriaceae Infections veterinary, Fish Diseases immunology, Immunity, Innate, Lactobacillus metabolism
- Abstract
The aim of this study was to determine the efficacy of dietary administration of Lactobacillus pentosus PL11 on growth performance and the immune and antioxidant systems in Japanese eel Anguilla japonica challenged with Edwardsiella tarda. A total of 75 Japanese eels (24.63±0.83 g) were grouped into 5 treatment diets which were a control diet (C) without E. tarda and 4 treatment diets with E. tarda challenge, including C for E. tarda challenge (NC), C plus L. pentosus PL11 supplemented diet (10⁸ cfu g⁻¹) (T-PL11), C plus L. pentosus KCCM 40997 supplemented diet (10⁸ cfu g⁻¹) (T-Lp) and C plus Weissella hellenica DS-12 supplemented diet (10⁸ cfu g⁻¹) (T-Wh) for 5 weeks (4 week before and 1 week after challenge). The results showed enhanced growth performance in fish fed the diet containing L. pentosus PL11 compared to others. The growth performance parameters including specific growth rate (SGR) and weight gain (WG), feed intake (FI), feed conversion ratio (FCR) and survival were significantly (P<0.05) higher in fish maintained on L. pentosus PL11 supplemented diet compared to C and NC. T-PL11 group also shows a significant increase in the levels of plasma immunoglobulin M, CAT and SOD activities compared to NC. Hematological parameters and mieloperoxidase were significantly better in fish fed the L. pentosus PL11 supplemented diet than in the control. L. pentosus PL11 supplementation recover the reduced expression of SOD, CAT and heat shock protein 70 genes in liver and intestine in pathogen challenged fishes. In conclusion the result of the current study demonstrated L. pentosus PL11 potential as an alternative to antibiotic supplementation to improve the growth and health performance of Japanese eel (A. japonica)., (Copyright © 2012 Elsevier Ltd. All rights reserved.)
- Published
- 2013
- Full Text
- View/download PDF
31. The in vitro activity of 15 antimicrobial agents against bacterial isolates from dogs.
- Author
-
Awji EG, Damte D, Lee SJ, Lee JS, Kim YH, and Park SC
- Subjects
- Animals, Bacterial Infections epidemiology, Bacterial Infections microbiology, Dog Diseases epidemiology, Dogs, Republic of Korea epidemiology, Anti-Bacterial Agents pharmacology, Bacteria drug effects, Bacterial Infections veterinary, Dog Diseases microbiology, Drug Resistance, Bacterial
- Abstract
The in vitro activity of 15 antimicrobial agents against clinical isolates of Staphylococcus pseudintermedius, Staphylococcus aureus, Escherichia coli, Pasteurella spp. and Streptococcus canis from dogs was investigated. For Staphylococcus spp., the highest frequency of resistance was observed for penicillin, followed by ampicillin, tetracycline and chloramphenicol. The highest frequency of resistance in E. coli isolates was recorded for tetracycline and streptomycin. Pasteurella spp. and S. canis had the highest resistance rate for tetracycline and chloramphenicol. Most isolates showed full susceptibility to low-level resistance to colistin, florfenicol and fluoroquinolones. Further studies using larger number of isolates from both healthy and diseased dogs would provide a broader picture of antimicrobial resistance at a national level and promote prudent use of antimicrobial agents in companion animals.
- Published
- 2012
- Full Text
- View/download PDF
32. Evaluation of linear regression statistical approaches for withdrawal time estimation of veterinary drugs.
- Author
-
Damte D, Jeong HJ, Lee SJ, Cho BH, Kim JC, and Park SC
- Subjects
- Animals, European Union, Models, Theoretical, United States, United States Food and Drug Administration, Drug Evaluation, Preclinical, Drug Residues analysis, Linear Models, Meat Products analysis, Veterinary Medicine
- Abstract
The safety of foods of animal origin requires the determination of the time at which veterinary drug residues in edible tissues are below a given maximum residue limit (MRL). For this reason, a certain withdrawal time estimate is determined for drugs based on statistical evaluation of concentrations determined by analytical analysis of residues in target organs of healthy animals. The purposes of this paper is to evaluate the linear regression statistical approach for the estimation of withdrawal time of veterinary drugs as recommended by Food and Drug Administration (FDA) and European Union/Committee for Medicinal Products for Veterinary use (EU/CVMP) and compare the application with a real model example. The withdrawal time estimate of the model has shown 2-5 days difference for the increase in tolerance limit from 95% (EU) to 99% (FDA) when calculated including censored data. But when it was excluded the range increased to 2-8 days for the same increase in tolerance. Furthermore, wider range of difference (3-21 days) and variation in significance was observed with inclusion/exclusion of censored data at the same level of tolerance. In conclusion, this study suggests inclusion/exclusion of censored data should be dependent on satisfying the statistical assumptions required rather than always including/excluding., (Copyright © 2011 Elsevier Ltd. All rights reserved.)
- Published
- 2012
- Full Text
- View/download PDF
33. Mutant prevention concentration and phenotypic and molecular basis of fluoroquinolone resistance in clinical isolates and in vitro-selected mutants of Escherichia coli from dogs.
- Author
-
Gebru E, Damte D, Choi MJ, Lee SJ, Kim YH, and Park SC
- Subjects
- Animals, Area Under Curve, Base Sequence, Ciprofloxacin analogs & derivatives, Ciprofloxacin pharmacology, Dogs, Enrofloxacin, Escherichia coli drug effects, Escherichia coli isolation & purification, Escherichia coli Infections microbiology, Microbial Sensitivity Tests veterinary, Molecular Sequence Data, Mutation, Anti-Bacterial Agents pharmacology, Dog Diseases microbiology, Drug Resistance, Bacterial genetics, Escherichia coli genetics, Escherichia coli Infections veterinary, Fluoroquinolones pharmacology
- Abstract
The antibacterial activity, selection of Escherichia coli (E. coli) mutants and mechanisms of fluoroquinolone resistance were investigated by integrating the minimum inhibitory concentration (MIC), mutant prevention concentration (MPC) and in vitro dynamic model approaches. Difloxacin and orbifloxacin, for which the above information has been scarce, were used. A range of area under curve over a 24h interval (AUC(24h))/MIC ratios and selected E. coli strains were investigated using the dynamic models. Continuous incubation for three days in the presence of difloxacin or orbifloxacin resulted in losses in E. coli susceptibility. An AUC(24h)/MIC (AUC(24h)/MPC)-dependent fluoroquinolone activity and selection of E. coli mutants was confirmed. Maximum losses in susceptibility occurred at AUC(24h)/MIC ratios of 54 (orbifloxacin) and 57.3 (difloxacin). AUC(24h)/MIC ratios of 169.8 (orbifloxacin) and 199.5 (difloxacin) were estimated to be protective against the selection of E. coli mutants, and the corresponding ratios based on AUC(24h)/MPC predictions were 34 (orbifloxacin) and 36.3 (difloxacin). When integrating our in vitro data with pharmacokinetic data in dogs, the conventional clinical doses of both drugs were found to be inadequate to attain the above protective values for 90% of the mutant subpopulation (AUC(24h)/MPC(90)). Both target mutations, esp. at codon 83 (Ser to Leu) of gyrA, and overexpression of efflux pumps contributed to resistance development, with mutants also showing decreased susceptibility to enrofloxacin and marbofloxacin. Additional studies would determine the role of mutations found outside the QRDR, at codon 24 of gyrA, and at codon 116 of parC, and establish the significance of these observations in vivo., (Copyright © 2011 Elsevier B.V. All rights reserved.)
- Published
- 2012
- Full Text
- View/download PDF
34. The role of Janus kinase 2 (JAK2) activation in pneumococcal EstA protein-induced inflammatory response in RAW 264.7 macrophages.
- Author
-
Gebru E, Kang EH, Damte D, Lee JS, Jang SH, Kim MH, Cheng H, and Park SC
- Subjects
- Animals, Blotting, Western, Cell Line, Gene Expression Profiling, Mice, Reverse Transcriptase Polymerase Chain Reaction, Signal Transduction, Time Factors, Bacterial Proteins toxicity, Carboxylic Ester Hydrolases toxicity, Cytokines biosynthesis, Janus Kinase 2 metabolism, Macrophages immunology, Macrophages microbiology, Streptococcus pneumoniae pathogenicity
- Abstract
In a previous study, we demonstrated pneumococcal EstA-induced inflammatory response through NF-κB and MAPK-dependent pathways. Herein, we tested the hypothesis that the Janus kinase 2 (JAK2) activation and associated signaling cascades may also be involved in EstA-induced inflammatory process in RAW 264.7 macrophages. Our immunoblot analysis indicated EstA-induced activation of JAK2, with the phosphorylated protein detected from 1 to 24 h post-stimulation. As type I interferon (IFN) signaling requires the JAK/STAT pathway, we investigated EstA-induced expression of INF-α4 and INF-β by semi-quantitative and quantitative RT PCR. Our results indicated both concentration- and time-dependent increases in both IFN-α4 and IFN-β mRNA expression after EstA challenge, with the highest fold-increases observed at 4 h and 6 h post-stimulation for IFN-α4 and IFN-β mRNA, respectively. Furthermore, we applied a pharmacological approach to demonstrate the effect of JAK2 inhibition on EstA-induced nitric oxide (NO) and pro-inflammatory cytokine production. The JAK2 inhibitor AG-490 reduced significantly (P < 0.05) EstA-induced NO production and the expression of iNOS mRNA in a concentration-dependent manner. Similarly, EstA-induced IL-1β and IL-6 production and their respective mRNA expression were markedly suppressed by AG-490. However, AG-490 had no inhibitory effect on both mRNA and protein levels of TNF-α. Taken together, we demonstrate that JAK2 activation and IFN I signaling are integral parts of EstA-induced inflammatory process. Further studies will elucidate the interaction of the different signaling pathways, the specific downstream targets of JAK2, the kinetics of cytokine release, and if EstA could induce the pro-inflammatory mediators to the same extent in alveolar macrophages., (Copyright © 2011 Elsevier Ltd. All rights reserved.)
- Published
- 2011
- Full Text
- View/download PDF
35. Mutant-prevention concentration and mechanism of resistance in clinical isolates and enrofloxacin/marbofloxacin-selected mutants of Escherichia coli of canine origin.
- Author
-
Gebru E, Choi MJ, Lee SJ, Damte D, and Park SC
- Subjects
- Animals, DNA, Bacterial chemistry, DNA, Bacterial genetics, Dogs, Drug Resistance, Bacterial, Enrofloxacin, Escherichia coli isolation & purification, Escherichia coli Infections microbiology, Female, Male, Microbial Sensitivity Tests, Molecular Sequence Data, Mutation, Selection, Genetic, Sequence Analysis, DNA, Time Factors, Anti-Bacterial Agents pharmacology, Dog Diseases microbiology, Escherichia coli drug effects, Escherichia coli genetics, Escherichia coli Infections veterinary, Fluoroquinolones pharmacology
- Abstract
The antibacterial activity and selection of resistant bacteria, along with mechanisms of fluoroquinolone resistance, were investigated by integrating the static [MIC or mutant-prevention concentration (MPC)] and in vitro dynamic model approaches using Escherichia coli isolates from diseased dogs. Using the dynamic models, selected E. coli strains and enrofloxacin and marbofloxacin at a range of simulated area under concentration-time curve over a 24 h interval (AUC(24 h))/MIC ratios were investigated. Our results indicated increasing losses in susceptibility of E. coli upon continuous exposure to enrofloxacin and marbofloxacin in vitro. This effect was transferable to other fluoroquinolones, as well as to structurally unrelated drugs. Our results also confirmed an AUC(24 h)/MIC (AUC(24 h)/MPC)-dependent antibacterial activity and selection of resistant E. coli mutants, in which maximum losses in fluoroquinolone susceptibility occurred at simulated AUC(24 h)/MIC ratios of 40-60. AUC(24 h)/MPC ratios of 39 (enrofloxacin) and 32 (marbofloxacin) were considered protective against the selection of resistant mutants of E. coli. Integrating our MIC and MPC data with published pharmacokinetic information in dogs revealed a better effect of the conventional dosing regimen of marbofloxacin than that of enrofloxacin in restricting the selection of resistant mutants of E. coli. Target mutations, especially at codon 83 (serine to leucine) of gyrA, and overexpression of efflux pumps contributed to resistance development in both clinically resistant and in vitro-selected mutants of E. coli. We also report here a previously undescribed mutation at codon 116 of parC in two laboratory-derived resistant mutants of E. coli. Additional studies would determine the exact role of this mutation in fluoroquinolone susceptibility, as well as establish the importance of our findings in the clinical setting.
- Published
- 2011
- Full Text
- View/download PDF
36. Comparative Antitumor Activity of Different Solvent Fractions from an Auricularia auricula-judae Ethanol Extract in P388D1 and Sarcoma 180 Cells.
- Author
-
Reza A, Choi MJ, Damte D, Jo WS, Lee SJ, Lee JS, and Park SC
- Abstract
The objective of this study was to evaluate and compare the antitumor activity of different solvent fractions (ethanol, dichloromethane, ethyl acetate, butanol and water) of the Auricularia auricula-judae 70% ethanol extract on the P388D1 macrophage and sarcoma 180 cells. A dose-dependent antitumor activity of each solvent fraction (from 0.01 mg/ml to 0.3 mg/ml) was shown against both cell types. These cytotoxic effects of all the tested fractions were confirmed on the MTT and SRB assays, without statistical differences each other. IC50 value of dichloromethane fraction was 94.2 μg/ml against sarcoma 180 cells lower than any other solvent fractions. The potent antitumor effect of the dichloromethane (DCM) fraction was also found against solid tumor in BALB/c mice. The splenomegaly and higher splenic index were found in tumor-bearing mice, with the DCM fraction returning to the negative control values. Thus, the results indicated the dichloromethane fraction may have potential ingredients as antitumor candidates.
- Published
- 2011
- Full Text
- View/download PDF
37. Anti-inflammatory Activity of Dichloromethane Extract of Auricularia auricula-judae in RAW264.7 Cells.
- Author
-
Damte D, Reza MA, Lee SJ, Jo WS, and Park SC
- Abstract
The present study investigated the anti-inflammatory effects of dichloromethane extract of Auricularia auricula-judae. Dichloromethane extract of Auricularia auricula-judae inhibited Lipopolysaccharide (LPS) -induced nitric oxide (NO) production significantly in a dose-dependent manner in the concentration ≥10 μg/ml (p < 0.05) . Furthermore, RT-PCR results of this study indicated that the extract markedly reduced the expressions of inflammatory cytokines (IL-6, TNF-α and IL-1β) mRNA in LPS-treated murine RAW 264.7 macrophages, which could possibly ameliorate the inflammation. Nevertheless, dichloromethane extract of Auricularia auricula-judae did not show complete inhibition of IL-6 mRNA expression. The inhibition of IL-1β cytokine at protein level was also observed in a dose dependent manner. In conclusion,the current study revealed the previously unknown effect of dichloromethane ethyl extract of Auricularia auricula-judae inhibitions of the production of NO, IL-6, TNF-α and IL-1β in LPS-stimulated macrophages.
- Published
- 2011
- Full Text
- View/download PDF
38. Immunomodulatory activities and subacute toxicity of a novel β-glucan from Paenibacillus polymyxa JB115 in rats.
- Author
-
Chang ZQ, Reza MA, Lee JS, Gebru E, Jang SH, Choi MJ, Lee SJ, Damte D, Kim JC, and Park SC
- Subjects
- Administration, Oral, Animals, Dose-Response Relationship, Drug, Female, Glucans isolation & purification, Glucans pharmacology, Immunologic Factors isolation & purification, Immunologic Factors pharmacology, Male, Rats, Rats, Sprague-Dawley, Toxicity Tests, Chronic, Glucans toxicity, Immunologic Factors toxicity, Paenibacillus chemistry
- Abstract
Subacute toxicity and immunopharmacological activities of β-glucan from P. polymyxa JB115 was evaluated in a 28-day feeding study in rats. The white blood cell count, red blood cell count, hematocrit, hemoglobin, thrombocytes (THR) and thrombocytocrit were significantly higher in male fed with β-glucan than control rats and the insignificant lower eosinophil count, mean corpuscular volume, mean cell hemoglobin and uninfected THR (uTHR) levels were observed in male whereas no marked changes in female rats. No other significant differences in serum chemistry and liver, kidney, and spleen weights were observed. The pathological changes and other abnormal indicators were not detected in urine. Female rats fed with diet supplemented with 0.01% β-glucan also showed marked increase in the percentage of blood cytotoxic T-lymphocytes compared to that of the control group while not significant differences in the percentage of blood B-lymphocytes. No adverse effects on general condition and behavior, growth, feed and water consumption and feed conversion efficiency were found. The results suggest that consumption of the novel β-1, 3/1, 6-glucan from P. polymyxa JB115 was not associated with any obvious toxic effects in rats, indicating its safety as a potential immunostimulant or as an adjuvant of some animal vaccines.
- Published
- 2011
- Full Text
- View/download PDF
39. Mycoplasma hyopneumoniae induces pro-inflammatory cytokine and nitric oxide production through NFκB and MAPK pathways in RAW264.7 cells.
- Author
-
Hwang MH, Damte D, Lee JS, Gebru E, Chang ZQ, Cheng H, Jung BY, Rhee MH, and Park SC
- Subjects
- Animals, Blotting, Western, Butadienes pharmacology, Cell Line, Cytokines immunology, Electrophoretic Mobility Shift Assay, Enzyme Activation, Imidazoles pharmacology, Macrophages cytology, Macrophages microbiology, Mice, Mitogen-Activated Protein Kinases immunology, NF-kappa B antagonists & inhibitors, Nitric Oxide immunology, Nitriles pharmacology, Phosphorylation, Pneumonia of Swine, Mycoplasmal microbiology, Protein Kinase Inhibitors pharmacology, Pyridines pharmacology, Pyrrolidines pharmacology, Swine, Thiocarbamates pharmacology, Cytokines biosynthesis, MAP Kinase Signaling System immunology, Macrophages immunology, Mycoplasma hyopneumoniae immunology, NF-kappa B immunology, Nitric Oxide biosynthesis, Pneumonia of Swine, Mycoplasmal immunology
- Abstract
In the present study, we confirmed the ability of M. hyopneumoniae to induce the secretion of large amount of proinflammatory cytokine and nitric oxide (NO) in murine macrophage RAW 264.7 cells. Moreover, M. hyopneumoniae-induced activation of the MAPK and NF-кB pathways by phosphorylation of ERK1/2, p38 and JNK/SAPK and by dissociation of IκB from NF-κB. Translocation of transcription factor NF-κB and its binding was confirmed through western blot and electromobility shift assay. From these results, we further hypothesized that these signal proteins were involved in M. hyopneumoniae-induced proinflammatory cytokines and NO productions in macrophages. Hence, we utilized specific blockers of MAPK and NF-κB to investigate the signaling pathway involvement in cytokine and NO production through pharmacological approaches. The results demonstrated significant inhibition of TNF-α, IL-1β, IL-6 and NO by MAPK inhibitors. NF-κB inhibitor PDTC significantly inhibited IL-1β and NO production. These findings contribute to the understanding of the mechanisms of immune reactivity and may ultimately prove useful in the development of new therapeutic strategies. In summary, we found critical evidence for the involvement of NF-κB and MAPK signaling pathways in the upregulation of proinflammatory cytokine and NO induced by M. hyopneumoniae.
- Published
- 2011
- Full Text
- View/download PDF
40. Optimization of culture media of pathogenic Mycoplasma hyopneumoniae by a response surface methodology.
- Author
-
Hwang MH, Damte D, Cho MH, Kim YH, and Park SC
- Subjects
- Biotechnology methods, Culture Media chemistry, Mycoplasma hyopneumoniae growth & development
- Abstract
Composition of culture medium for mass production of Mycoplasma hyopneumoniae was optimized using a response surface methodology (RSM). Initially, the influence of glucose, thallium acetate, fresh yeast extract, horse serum, and porcine serum on the production of mycoplasmal protein was assessed using a 'one factor at a time' technique. Next, factors with a significant effect, including fresh yeast extract, and horse and porcine sera, were selected for further optimization using a central composite design (CCD) of RSM. The experimental results were fitted into a second order polynomial model equation. Estimated optimal condition of the factors for maximum production of mycoplasmal protein (i.e., triple-fold increase from 0.8 mg/L produced by basal mycoplasma media to 2.5 mg/L) was 10.9% fresh yeast extract, 15% horse serum, and 31.5% porcine serum (v/v). For the optimized conditions, a 2.96 mg/L experimental result was observed, similar to the estimated optimal conditions result of the CCD.
- Published
- 2010
- Full Text
- View/download PDF
41. Febrile illnesses of different etiology among outpatients in four health centers in Northwestern Ethiopia.
- Author
-
Animut A, Mekonnen Y, Shimelis D, and Ephraim E
- Subjects
- Adolescent, Animals, Brucellosis epidemiology, Child, Child, Preschool, Comorbidity, Ethiopia epidemiology, Female, Humans, Malaria epidemiology, Malaria parasitology, Male, Plasmodium falciparum isolation & purification, Plasmodium vivax isolation & purification, Pneumonia, Bacterial epidemiology, Prevalence, Typhoid Fever epidemiology, Typhus, Epidemic Louse-Borne epidemiology, Fever epidemiology, Fever etiology, Outpatients
- Abstract
Fever of different etiology is common in tropical and subtropical countries of the world. Etiological agents of febrile illnesses were assessed in 653 acute febrile patients aged 3 to 17 years who attended the outpatient departments of Dembecha Health Center, Jiga Health Center, Quarit Health Center, and Finoteselam Hospital in western Gojjam zone, northwestern Ethiopia. Malaria was the most prevalent illness, infecting 62% of all cases. Its prevalence varied significantly from 52% (Dembecha) to 72.7% (Quarit) (chi(2)=15.02, P=0.000). Plasmodium falciparum was the first cause of malaria (47.3%) followed by P. vivax (23%). Mixed infection of both P. falciparum and P. vivax was found in 7.2% of the cases. The other febrile infections were pneumonia (7%), typhoid (5.8%), typhus (5.1%), and brucellosis (2.6%). The availability of diagnostic facilities and the awareness of the community regarding the prevalence of non-malaria febrile illnesses are very low, and these illnesses are diagnosed clinically. As these illnesses are nonspecific, especially during the early stages of onset, misdiagnosis and mistreatment can occur. Therefore, it is recommended that the necessary diagnostic materials and awareness should be in place for prompt treatment of febrile cases in these districts.
- Published
- 2009
42. Intestinal parasitic infections in HIV/AIDS and HIV seronegative individuals in a teaching hospital, Ethiopia.
- Author
-
Hailemariam G, Kassu A, Abebe G, Abate E, Damte D, Mekonnen E, and Ota F
- Subjects
- Adolescent, Adult, Child, Preschool, Cross-Sectional Studies, Ethiopia epidemiology, Feces parasitology, Female, HIV Seronegativity, Humans, Infant, Intestinal Diseases, Parasitic parasitology, Male, Middle Aged, Prevalence, AIDS-Related Opportunistic Infections epidemiology, HIV Infections complications, Intestinal Diseases, Parasitic epidemiology
- Abstract
The magnitude of intestinal parasitic infection in human immunodeficiency virus (HIV) /AIDS patients requires careful consideration in the developing world. However, there have been very few studies addressing this issue in Ethiopia. This study was conducted to determine the prevalence of intestinal parasitic infection in HIV/AIDS patients at Jimma Hospital, Southwest Ethiopia, between January and February 2002. Stool specimens from HIV/AIDS patients and control groups were screened for intestinal parasitic infections using direct and formalin-ether sedimentation concentration methods. Out of 78 HIV/AIDS patients, 52.6% (41/78), and out of 26 HIV-negative individuals, 42.3% (11/26), were infected with one or more types of intestinal protozoa and/or helminthes. The parasites detected among HIV/AIDS patients included Ascaris lumbricoides (30.8%), Blastocystis spp. (14.1%), Entamoeba histolytica (10.3%), Trichuris trichiura (6.4%), Strongyloides stercoralis (5.1%), Giardia lamblia (3.8%), Schistosoma mansoni (2.5%), hookworm species (2.5%), and Taenia spp. (1.3%). Multiple infections were more common among HIV/AIDS patients. Blastocystis spp. were found to be significantly higher in HIV/AIDS patients than in controls (P < 0.05). The magnitude of intestinal parasitic infection was high both in HIV/AIDS patients and in controls. Routine examinations of stool samples for parasites would significantly benefit the HIV-infected and uninfected individuals by contributing to reduce morbidity.
- Published
- 2004
43. Clinical profile of acute renal failure in children admitted to the department of pediatrics, Tikur Anbessa Hospital.
- Author
-
Shimelis D and Tadesse Y
- Subjects
- Acute Kidney Injury etiology, Acute Kidney Injury physiopathology, Child, Child, Preschool, Ethiopia, Female, Humans, Infant, Male, Retrospective Studies, Risk Factors, Acute Kidney Injury diagnosis, Hemolytic-Uremic Syndrome complications, Hospital Departments statistics & numerical data, Pediatrics statistics & numerical data
- Abstract
Case records of 30 pediatric patients with the diagnosis of acute renal failure (ARF) admitted to Tikur Anbessa Hospital in Addis Ababa between October 1997 and October 2001 were analyzed There were 15 females and 15 males. Three patients had glomerulonephritis, in two patients the cause of acute renal failure was not known, one child had obstructive uropathy. Twenty-three patients had post-diarrheal hemolytic uremic syndrome. The age ranges of post-diarrheal hemolytic uremic syndrome cases were between 0.6 years and 7 years with a median age of 2.2 years. Fourteen patients died of acute renal failure among this hemolytic urmic syndrome contributed to the death of 9 patients. The commonest clinical presentation was severe oligo-anuria in (25 patients), edema in (22 patients), and bloody diarrhea in (21 patients). From stool cultures of 16 patients with hemolytic uremic syndrome, there were five isolates of Shigella species, two isolates of E. coli, and two isolates of Salmonella species. Five patients had non-oliguric acute renal failure. Hemolytic uremic syndrome is the leading cause of acute renal failure in infants and young children in our series. Vigorous resuscitation and early dialysis will reduce mortality rate.
- Published
- 2004
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.