ObjectiveThe aim of this study was to determine the level of drug resistance by gram-negative bacteria isolated from selected sewage polluted urban rivers in Addis Ababa, Ethiopia.ResultsFrom a total of 94 river water samples, 90 medically important gram-negative bacterial isolates were recovered to the species level. The predominant bacteria isolated were E. coli. 23 (26%) followed by K. pneumoniae 18 (20%), K. oxytoca 17 (19%). E. coli showed a high level of resistance to ampicillin 21 (91.3%), cefalotin, cefuroxime, ceftriaxone and cefepime 16 (70%). Both K. pneumoniae and K. oxytoca showed high resistance to ampicillin 16 (94%) and 17 (95%) respectively. Among identified bacterial species, most of them showed a multidrug-resistant pattern. Providential retigerri showed 100% multidrug resistance followed by P. alkalificiens (90%), E. coli (78%), M. morgani (75%), and C. frundi (60%).Electronic supplementary materialThe online version of this article (10.1186/s13104-018-3622-0) contains supplementary material, which is available to authorized users.

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Background: Nowadays food safety is considered to be one of the most global public health concerns. Edible oil is one of the most popular types of food to be consumed in every Ethiopian house. Though, its safety is not emphasized. It is produced in Ethiopia from small scale production to large industry level and / or imported from other countries.Objective: To evaluate microbial and hygienic quality of edible oil. Methods:A six year retrospective study design was conducted from January 2010 to January 2015 on 125 edible oil samples which were examined at Ethiopian public health institute, food safety and public health microbiology research laboratory, Addis Ababa, Ethiopia. The data was extracted using developed format from a laboratory registration book. Edible oil samples were examined for the presence of yeast, mould, aerobic plate count, total coliforms, fecal coliforms and Escherichia coli (E.coli). Additionally, examination for the presence of pathogenic organisms like salmonella species, shigella species, and staphylococcus aureus (S. aureus) were also performed. Data was cleaned and entered to Microsoft XL and then exported to SPSS for statistical analysis and values of different parameters were expressed as the mean±standard error (±S.E).Results: One hundred twenty five edible oil samples were examined among which 62(48%) samples were containing a varying number of bacteria and/or Moulds. Results given in Table1 shows that the aerobic plate count was detected in 46(35.6%), moulds 32(24.8%), Yeasts 4(3.1%), total coliforms 6(4.5%) samples. Fecal coliforms, E.coli and S.aureus were found only in one sample. None of the examined edible oil samples contain salmonella and shigella organisms. Conclusion:Some isolated microorganism indicates unhygienic condition of the edible oil somewhere in its way from processing to packaging and market display. The average microbial load is not higher than 105cfu/ml for Aerobic mesophillic bacteria and 104cfu/ml for moulds. These concentrations may be able to cause health problems in individuals who consume without enough heat processing and also some of the food spoilage organisms, specially the moulds, can hasten the deterioration the edible oil.

Background: Staphylococcus aureus is a leading cause of food poisoning resulting from the consumption of contaminated food with staphylococcal enterotoxins. Raw meat is a good medium for the survival and spread of drug-resistant S. aureus. Objective: To look for the prevalence of drug-resistant S. aureus in Addis Ababa abattoir enterprise. Material & Methods: A cross-sectional study was conducted from November 2013 to April 2014 in Addis Ababa abattoir enterprise. A total of 185 swab samples were collected from the carcasses of sheep, goat and slaughtering materials such as workers’ clothes, vehicles, knives and hands. Isolation and identification of S. aureus were conducted using the conventional culture methods and signatory tests. Antimicrobial sensitivity was conducted using standard methods. Results: The overall prevalence rate for S. aureus in the present study was 33%. The higher prevalence rates of S. aureus were recorded from sheep carcasses 36%, followed by 30% from the environment and 16% from goat carcasses. The variation in the prevalence of S. aureus between the carcasses and environment was not statically significant (p > 0.05). More than 90% of S. aureus strains were sensitive to vancomycin, chloramphenicol, gentamicin and kanamycin. While 86.9% S. aureus strains were resistant to penicillin G 80.3% resistant to ampicillin, 63.9% resistant to ceftriaxone, 62.3% resistant to oxacilin, and 62.3% resistant to cefoxitin respectively. Conclusion: The present study indicated that the quality of slaughtered sheep carcasses was more contaminated by S. aureus as compared to goat carcasses, during slaughtering, processing, handling and transportation. The presence of MDR strain in the carcasses demonstrates that there is a growing need to control antimicrobial resistance in sheep and goat carcasses.

There is studies limitation regarding the effect of khat chewing on nutritional status. Community based comparative cross-sectional study had been conducted from March to June, 2015; with cluster sampling and systematic random sampling techniques for khat chewers and non-khat chewers respectively. The data was collected by using interview administered questionnaire, observation and weight scale measurement among 504 study participants. The study revealed that from entire khat chewers 52(20.5%) of them and of non-khat chewers 34(13.5%) of them were underweight. Khat chewers were 2.102 times more likely underweight compared to those non-khat chewers. khat chewers who had meal twice per day were 2.856 time more likely underweight. Khat chewers who used animal and animal products as their main meal component daily were 0.413 times less likely to be underweight; Whereas the odds of underweight was 26% times less likely among khat users who intake two liters of fluid per chewing session. In other case, those who chewed khat for 2-3 hours per session were 0.231 times less likely to be underweight. Under nutrition is a public nutritional status problem in which khat chewers are more affected. Khat chewing conditions and meal conditions including amount of fluid consumed per chewing session are factors that affect the nutritional status of the khat chewers. Minimizing amount of khat consumed per session, shortening of khat chewing session length and increasing amount of fluid intake more than two liters per chewing session and nutritional management with nutritionist advices are important points.