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Articles by O.A.O. EL Owni
Total Records ( 3 ) for O.A.O. EL Owni
  Ibtisam E.M. El Zubeir , O.A.O. El Owni and G.E. Mohamed
  Milk and blood serum from forty five Friesian cows (15 healthy, 15 with subclinical mastitis and 15 with clinical mastitis) were used during the present study. Levels of micro minerals (Fe, Cu and Fe) were determined. The level of copper, iron and zinc in milk and blood serum of mastitis-infected cows (clinical and subclinical) and healthy cows were evaluated. When comparing healthy cows milk to those with subclinical mastitis, there was a significant decrease (p<0.05) in copper. Comparison between healthy and clinically infected cow`s milk samples revealed a significant increase (p<0.01) in zinc. Comparison of clinical and subclinical mastitis revealed a significant increase of copper (p<0.05). Blood serum samples from subclinically and clinically mastitis-infected cows showed a significant decrease (p<0.05) for zinc only.
  Lemya , M. Warsama , Ibtisam E.M. El Zubeir and O.A.O. El Owni
  The study was based on surveying thirty six samples of Sudanese white cheese from restaurants, supermarkets and groceries (Khartoum North). The comparison of the chemical composition (total solids, total protein, fat, ash and acidity) and some of the microbial hazards (E. coli, Salmonella spp. and Staphylococcus aureus) associated with cheese were estimated. The means of total solids, ash, fat, protein and acidity for the samples were 47.8, 6.2, 14.0, 15.9 and 0.04%, respectively. The result indicated that there was non significant differences between total solids, ash, fat, acidity and protein in all batches in different sources. Positive isolates for E. coli (4), Salmonella typhi (4), Salmonella paratyphi (4) and S. aureus (8), were found in restaurants. Similarly 4, 4, 0 and 4 and 2, 2, 0 and 2 isolates of Salmonella typhi, Salmonella paratyphi, S. aureus and E. coli were found, respectively in supermarkets and groceries. The log counts of coliforms bacteria was 6.56006±0.52936, 6.5423±0.24873 and 6.4856±0.23278 and the log counts of total bacteria (SPC) was 9.46956±0.58882, 9.02652±0.01826 and 8.9713±0. 44743 for cheese samples collected, respectively from restaurants, supermarkets and groceries. Similarly, the log of Salmonella spp. counts was found to be 4.0612±0.0629, 2.0037±2.8337 and 4.97803±1.1807; the log count of Staphylococcus aureus was 3.40887±4.82087, 4.90646±6.93878 and 0 and the log of E. coli counts was 5.23337±0.53085, 0 and 5.33815±0.771346, respectively from restaurants, supermarkets and groceries.
  Ibtisam E.M.El Zubeir , P. Kutzer and O.A.O. EL Owni
  The present study was conducted to investigate mastitis causing organisms in dairy cows and to correlate them with the isolates from udder skin of cows as well as their environment (air). The data revealed higher incidences of subclinical mastitis than the clinical form of the disease. Staphylococcus aureus (11.5%), Streptococcus agalactiae (0.83%), Escherichia coli (7%), Klebsiella pneumoniae (9.4%) and Enterococcus faecium (2.5%), were the important pathogens isolated from mastitic cows` milk samples. The udder` skin of the cows revealed the presence of Pseudomonas aerugenosa (9.5%) and Staphylococcus aureus (0.95%). However, the samples sediment from the air of the cows fences, revealed as a pathogen, only the presence of S. aureus (0.95%). Other non- serious mastitis pathogens were also found, in the three groups of samples, during the present study. Antibiotic susceptibility tests were undertaken. The most prominent resistant was those of S. aureus towards tetracycline (79.41%) followed by penicillin (29.41%) and amoxacillin- cluvenic acids (20.59%). The susceptibility of E. coli showed resistance towards erythromycin (76.47%), tetracycline (29.41%), streptomycin and sulfamexazol-trimethoprim (17.65%) and kanamycin (5.88%). Similarly Enterococcus faecium, showed multiple range of resistant to the drugs tested.
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