Background Beta-lactamase enzymes-producing Enterobacteriaceae have emerged in many hospital sett... more Background Beta-lactamase enzymes-producing Enterobacteriaceae have emerged in many hospital settings resulting in poor treatment outcomes. We aimed to determine resistant patterns of Beta-lactamase enzymes among Enterobacteriaceae collected from referral hospitals in Khartoum state, Sudan. Methods A total of 168 Enterobacteriaceae recovered from clinical samples of patients during May 2014 to February 2015. Identification and susceptibility testing of the isolates were performed as per standard methods. Double-disk synergy test was applied to determine the presence of extended-spectrum β-lactamase (ESBL) production. AmpC beta-lactamases and carbapenemase were screened using AmpC disk test and the modified Hodge test, respectively. Results ESBL-producing Enterobacteriaceae represented 45.2%, with a higher rate among K. pneumoniae. AmpC beta-lactamase detected as 49.3%, with peak levels among Acinetobacter baumannii (A. baumannii) (83.3%) and Enterobacter cloacae (75%). Carbapenemase production was found among 74.5% of isolates, with high rates among A. baumannii (89%) and K. pneumoniae (78%). Overall Enterobacteriaceae, highest resistance rates were found in penicillins and cephalosporins agents. Amikacin and imipenem revealed good activities against most of the isolates, except for A. baumannii (66.7% and 75%, respectively). E. coli yielded high resistance rates for amoxicillin (98.8%), amoxicillin-clavulanic acid (93.8%), cefotaxime (93.8%), and ciprofloxacin (76.5%). Moderate resistance rates were observed among K. pneumoniae for ciprofloxacin (61.5%), nitrofurantoin (57.7%) and cefoxitin (40.4%). Conclusions ESBL, AmpC beta-lactamase and carbapenemase-producing Enterobacteriaceae are emerging and may contribute to increasing antimicrobial resistance in Sudan. Phenotypic screening of such enzymes is rapid and straightforward and should be simultaneously done and carried out routinely in our hospitals.
Methicillin-resistant Staphylococcus aureus (MRSA) is known for serious health problems. Testing ... more Methicillin-resistant Staphylococcus aureus (MRSA) is known for serious health problems. Testing new inexpensive natural products such as mango kernel (Mangifera indica L., Anacardiaceae) may provide alternative and economically viable anti-MRSA drugs. In the current study, we screened clinical isolates from Aseer Central Hospital, Saudi Arabia, during 2012–2017 for MRSA and tested an ethanolic extract of mango kernel for anti-MRSA activity. Brief confirmation of MRSA was performed by the Vitek 2 system, while antibiotic sensitivity of strains was tested for their clinical relevance. The In vitro disc diffusion method was used to test the anti-MRSA activity of the ethanolic mango kernel extract. The antimicrobial activity of mango kernel was compared to that of standard drugs (oxacillin and vancomycin). Of the identified 132 S. aureus strains, 42 (31.8%) were found to be MRSA and their prevalence showed a clear increase during the last two years (2016-2017; p<0.001). MRSA strains...
Background: Prader-Willi syndrome (PWS) is a genetic disease caused by loss of expression of the ... more Background: Prader-Willi syndrome (PWS) is a genetic disease caused by loss of expression of the paternally inherited copy of several genes on the long arm of chromosome 15. Ophthalmic manifestations of PWS include strabismus, amblyopia, nystagmus, hypopigmentation of the iris and choroid, diabetic retinopathy, cataract and congenital ectropion uvea. An overlap between PWS and oculocutaneous albinism (OCA) has long been recognized and attributed to deletion of OCA2 gene located in PWS critical region (PWCR). Case report: A 30-year-old male patient with PWS presented with vision loss in his left eye. His right eye had normal visual acuity. Multimodal imaging revealed absence of a foveal depression and extremely reduced diameter of the foveal avascular zone in the right eye and an inactive type 2 macular neovascular lesion in the left eye. Conclusions: We report a presumed association of fovea plana and choroidal neovascularization with PWS. The use of multimodal imaging revealed novel findings in a PWS patient that might enrich our current understanding of the overlap between PWS and OCA.
The present study evaluated histologically and histometrically the efficacy of micro-, nano or mi... more The present study evaluated histologically and histometrically the efficacy of micro-, nano or mixed composite of hydroxyapatite graft in treatment of surgically created defects around dental implants in mongrel dogs. Immediate implant was used after extraction of lower third premolar in mongreal male dogs. Critical size defects were created in intact proximal alveolar bone to each implant. The defects were divided randomly into four groups of two animals based on biomaterials used for treatment:1 received no treatment (negative control);2 defects treated with nanohydroxyapatite bone graft;3 defects treated with micro hydroxyapatite bone graft; and4 defects treated with a mixed composite of micro and nano hydroxyapatite. Animals were sacrificed at 2 months and histologic and histometric evaluation was carried out. The amount of new bone formed with nano hydroxyapatite bone graft was highly significant than that obtained by micro or mixed composite of hydroxyapatite. Defects treated ...
ABSTRACT The study aims to investigating the relationship between psychological empowerment in wo... more ABSTRACT The study aims to investigating the relationship between psychological empowerment in workplace (meaningfulness, competence, influence, self-determination, and impact) and Type (A) Personality (impatience, Job involvement, and Hard Driving Competitive); the study also examines the influences of some Demographic variables on psychological empowerment in workplace, and Type (A) Personality. The sample consists of (62) faculty members and their assistants from (some Egyptian public universities, scientific and humanity specialization, male and female, and married and unmarried). The researcher translated and verified the validity of Psychological Empowerment in the Workplace scale by Spritzer and Type A Behavior scale by Friedman &amp; Rosenman. Data was analyzed using correlation and t-test . The results indicated that psychological empowerment has significant relationship with Type A Behavior, moreover Demographic variables did not have significant impact on the total score of psychological empowerment and Type A Behavior except Marital Status; Where unmarried staff members marked a high degree of Type A Behavior compared to married staff members.
In this paper a model to investigate the spectrum opportunities for cognitive radio networks in t... more In this paper a model to investigate the spectrum opportunities for cognitive radio networks in three radar frequency bands L, S and C at a specific location is introduced. We consider underlay unaware spectrum sharing model. The Secondary System we assume is an OFDM based system. The followed strategy is built upon defining a specific co or adjacent channel as a spectrum opportunity if-and only if-the interference generated by the secondary system occupying that channel into the radar system is less than the permissible interference defined by the value of Interference to Noise ratio (INR) and the radar receiver inherited noise level. The simulation results show that for the same transmission parameters C band offer more spectrum opportunities than S band which is itself offers more spectrum opportunities than L band.
... Marzougui Dhafer, Kan Ching-Dao and Bedewi Nabih E., Development and Validation of an NCAP S... more ... Marzougui Dhafer, Kan Ching-Dao and Bedewi Nabih E., Development and Validation of an NCAP Simulation using LS-DYNA3D, FHWA/NHTSA ... Cook Robert D., Malkus David S. and PleshaMichael E., Concepts and Applications of Finite Element Analysis, Chapter 11 & 12 ...
An outbreak of gout was investigated in a growing layers farm of 45000 birds located in Tripoli, ... more An outbreak of gout was investigated in a growing layers farm of 45000 birds located in Tripoli, Libya. Mortality was commenced at 39 days-old reaching to a total of 489 birds within 10 days. Post mortem was conducted and kidney tissue samples were fixed in 10% neutral formalin prior to processing. Feed samples were sent to the Animal Nutrition Department for analysis which revealed 23.47% crude protein and 3.5% calcium. Gross lesions comprised of deposition of chalky white material covering the pericardium and enlarged kidneys with necrotic foci, hemorrhage and nephrosis. Most of birds showed swollen ureter of one or both sides. Histopathologically, severe damage of tubules characterized by moderate to severe tubular dilation and necrosis and central bluish gouty deposition surrounded by radiations of needle like urate crystals followed by granulomatous reaction of lymphocytes, macrophages and fibroblasts. The collecting renal tubules, urinephric ducts and ureters were also filled by gouty deposits with epithelial hyperplastic changes and chronic inflammatory cellular reaction in their walls. The interstitial tissue showed edema, congestion, hemorrhage and lymphomononuclear cell infiltration. This gout outbreak in growing layers is attributed to high concentration of crude protein and calcium in diet.
In this paper we introduce a technique for spectrum scanning with the maximum minimum eigenvalue ... more In this paper we introduce a technique for spectrum scanning with the maximum minimum eigenvalue detection based spectrum sensing. The fundamental problem we address in this paper is the inability of using maximum minimum eigenvalue detection with filtering in time domain where the white noise becomes coloured. The solution we propose here is based on frequency domain rectangular filtering. By
Journal of racial and ethnic health disparities, Apr 2, 2016
Although skin-whitening products are commonly used among dark-skinned women of African descent, r... more Although skin-whitening products are commonly used among dark-skinned women of African descent, research on the frequency with which Sudanese women use skin-whitening products is lacking. A cross-sectional study was conducted at the University of Gezira, Sudan, on the use of skin-whitening products among a sample of Sudanese undergraduate females (ages 16-33 years). Sociodemographic characteristics were collected, and students were asked whether they had used skin-whitening products in the past 12 months. Of the 348 undergraduate females surveyed in this study, 74.4 % reported using skin-whitening products within the past year. Of this group, 2.7 % reported using injections, 2.4 % pills, 30.6 % bleaching cream, and 76.2 % soap. Illegal sources (e.g., people selling on the sides of roads) of skin-whitening products were reported by 22.8 %. The use of skin-whitening products was common in females who were not satisfied with their skin colors more so than those who were satisfied with ...
Current Opinion in Otolaryngology & Head and Neck Surgery, 2001
Advertisement. Close Window. Close Window. Thank you for choosing to subscribe to the eTOC for Cu... more Advertisement. Close Window. Close Window. Thank you for choosing to subscribe to the eTOC for Current Opinion in Otolaryngology & Head and Neck Surgery. Enter your Email address: Wolters Kluwer Health may email you ...
Background Beta-lactamase enzymes-producing Enterobacteriaceae have emerged in many hospital sett... more Background Beta-lactamase enzymes-producing Enterobacteriaceae have emerged in many hospital settings resulting in poor treatment outcomes. We aimed to determine resistant patterns of Beta-lactamase enzymes among Enterobacteriaceae collected from referral hospitals in Khartoum state, Sudan. Methods A total of 168 Enterobacteriaceae recovered from clinical samples of patients during May 2014 to February 2015. Identification and susceptibility testing of the isolates were performed as per standard methods. Double-disk synergy test was applied to determine the presence of extended-spectrum β-lactamase (ESBL) production. AmpC beta-lactamases and carbapenemase were screened using AmpC disk test and the modified Hodge test, respectively. Results ESBL-producing Enterobacteriaceae represented 45.2%, with a higher rate among K. pneumoniae. AmpC beta-lactamase detected as 49.3%, with peak levels among Acinetobacter baumannii (A. baumannii) (83.3%) and Enterobacter cloacae (75%). Carbapenemase production was found among 74.5% of isolates, with high rates among A. baumannii (89%) and K. pneumoniae (78%). Overall Enterobacteriaceae, highest resistance rates were found in penicillins and cephalosporins agents. Amikacin and imipenem revealed good activities against most of the isolates, except for A. baumannii (66.7% and 75%, respectively). E. coli yielded high resistance rates for amoxicillin (98.8%), amoxicillin-clavulanic acid (93.8%), cefotaxime (93.8%), and ciprofloxacin (76.5%). Moderate resistance rates were observed among K. pneumoniae for ciprofloxacin (61.5%), nitrofurantoin (57.7%) and cefoxitin (40.4%). Conclusions ESBL, AmpC beta-lactamase and carbapenemase-producing Enterobacteriaceae are emerging and may contribute to increasing antimicrobial resistance in Sudan. Phenotypic screening of such enzymes is rapid and straightforward and should be simultaneously done and carried out routinely in our hospitals.
Methicillin-resistant Staphylococcus aureus (MRSA) is known for serious health problems. Testing ... more Methicillin-resistant Staphylococcus aureus (MRSA) is known for serious health problems. Testing new inexpensive natural products such as mango kernel (Mangifera indica L., Anacardiaceae) may provide alternative and economically viable anti-MRSA drugs. In the current study, we screened clinical isolates from Aseer Central Hospital, Saudi Arabia, during 2012–2017 for MRSA and tested an ethanolic extract of mango kernel for anti-MRSA activity. Brief confirmation of MRSA was performed by the Vitek 2 system, while antibiotic sensitivity of strains was tested for their clinical relevance. The In vitro disc diffusion method was used to test the anti-MRSA activity of the ethanolic mango kernel extract. The antimicrobial activity of mango kernel was compared to that of standard drugs (oxacillin and vancomycin). Of the identified 132 S. aureus strains, 42 (31.8%) were found to be MRSA and their prevalence showed a clear increase during the last two years (2016-2017; p<0.001). MRSA strains...
Background: Prader-Willi syndrome (PWS) is a genetic disease caused by loss of expression of the ... more Background: Prader-Willi syndrome (PWS) is a genetic disease caused by loss of expression of the paternally inherited copy of several genes on the long arm of chromosome 15. Ophthalmic manifestations of PWS include strabismus, amblyopia, nystagmus, hypopigmentation of the iris and choroid, diabetic retinopathy, cataract and congenital ectropion uvea. An overlap between PWS and oculocutaneous albinism (OCA) has long been recognized and attributed to deletion of OCA2 gene located in PWS critical region (PWCR). Case report: A 30-year-old male patient with PWS presented with vision loss in his left eye. His right eye had normal visual acuity. Multimodal imaging revealed absence of a foveal depression and extremely reduced diameter of the foveal avascular zone in the right eye and an inactive type 2 macular neovascular lesion in the left eye. Conclusions: We report a presumed association of fovea plana and choroidal neovascularization with PWS. The use of multimodal imaging revealed novel findings in a PWS patient that might enrich our current understanding of the overlap between PWS and OCA.
The present study evaluated histologically and histometrically the efficacy of micro-, nano or mi... more The present study evaluated histologically and histometrically the efficacy of micro-, nano or mixed composite of hydroxyapatite graft in treatment of surgically created defects around dental implants in mongrel dogs. Immediate implant was used after extraction of lower third premolar in mongreal male dogs. Critical size defects were created in intact proximal alveolar bone to each implant. The defects were divided randomly into four groups of two animals based on biomaterials used for treatment:1 received no treatment (negative control);2 defects treated with nanohydroxyapatite bone graft;3 defects treated with micro hydroxyapatite bone graft; and4 defects treated with a mixed composite of micro and nano hydroxyapatite. Animals were sacrificed at 2 months and histologic and histometric evaluation was carried out. The amount of new bone formed with nano hydroxyapatite bone graft was highly significant than that obtained by micro or mixed composite of hydroxyapatite. Defects treated ...
ABSTRACT The study aims to investigating the relationship between psychological empowerment in wo... more ABSTRACT The study aims to investigating the relationship between psychological empowerment in workplace (meaningfulness, competence, influence, self-determination, and impact) and Type (A) Personality (impatience, Job involvement, and Hard Driving Competitive); the study also examines the influences of some Demographic variables on psychological empowerment in workplace, and Type (A) Personality. The sample consists of (62) faculty members and their assistants from (some Egyptian public universities, scientific and humanity specialization, male and female, and married and unmarried). The researcher translated and verified the validity of Psychological Empowerment in the Workplace scale by Spritzer and Type A Behavior scale by Friedman &amp; Rosenman. Data was analyzed using correlation and t-test . The results indicated that psychological empowerment has significant relationship with Type A Behavior, moreover Demographic variables did not have significant impact on the total score of psychological empowerment and Type A Behavior except Marital Status; Where unmarried staff members marked a high degree of Type A Behavior compared to married staff members.
In this paper a model to investigate the spectrum opportunities for cognitive radio networks in t... more In this paper a model to investigate the spectrum opportunities for cognitive radio networks in three radar frequency bands L, S and C at a specific location is introduced. We consider underlay unaware spectrum sharing model. The Secondary System we assume is an OFDM based system. The followed strategy is built upon defining a specific co or adjacent channel as a spectrum opportunity if-and only if-the interference generated by the secondary system occupying that channel into the radar system is less than the permissible interference defined by the value of Interference to Noise ratio (INR) and the radar receiver inherited noise level. The simulation results show that for the same transmission parameters C band offer more spectrum opportunities than S band which is itself offers more spectrum opportunities than L band.
... Marzougui Dhafer, Kan Ching-Dao and Bedewi Nabih E., Development and Validation of an NCAP S... more ... Marzougui Dhafer, Kan Ching-Dao and Bedewi Nabih E., Development and Validation of an NCAP Simulation using LS-DYNA3D, FHWA/NHTSA ... Cook Robert D., Malkus David S. and PleshaMichael E., Concepts and Applications of Finite Element Analysis, Chapter 11 & 12 ...
An outbreak of gout was investigated in a growing layers farm of 45000 birds located in Tripoli, ... more An outbreak of gout was investigated in a growing layers farm of 45000 birds located in Tripoli, Libya. Mortality was commenced at 39 days-old reaching to a total of 489 birds within 10 days. Post mortem was conducted and kidney tissue samples were fixed in 10% neutral formalin prior to processing. Feed samples were sent to the Animal Nutrition Department for analysis which revealed 23.47% crude protein and 3.5% calcium. Gross lesions comprised of deposition of chalky white material covering the pericardium and enlarged kidneys with necrotic foci, hemorrhage and nephrosis. Most of birds showed swollen ureter of one or both sides. Histopathologically, severe damage of tubules characterized by moderate to severe tubular dilation and necrosis and central bluish gouty deposition surrounded by radiations of needle like urate crystals followed by granulomatous reaction of lymphocytes, macrophages and fibroblasts. The collecting renal tubules, urinephric ducts and ureters were also filled by gouty deposits with epithelial hyperplastic changes and chronic inflammatory cellular reaction in their walls. The interstitial tissue showed edema, congestion, hemorrhage and lymphomononuclear cell infiltration. This gout outbreak in growing layers is attributed to high concentration of crude protein and calcium in diet.
In this paper we introduce a technique for spectrum scanning with the maximum minimum eigenvalue ... more In this paper we introduce a technique for spectrum scanning with the maximum minimum eigenvalue detection based spectrum sensing. The fundamental problem we address in this paper is the inability of using maximum minimum eigenvalue detection with filtering in time domain where the white noise becomes coloured. The solution we propose here is based on frequency domain rectangular filtering. By
Journal of racial and ethnic health disparities, Apr 2, 2016
Although skin-whitening products are commonly used among dark-skinned women of African descent, r... more Although skin-whitening products are commonly used among dark-skinned women of African descent, research on the frequency with which Sudanese women use skin-whitening products is lacking. A cross-sectional study was conducted at the University of Gezira, Sudan, on the use of skin-whitening products among a sample of Sudanese undergraduate females (ages 16-33 years). Sociodemographic characteristics were collected, and students were asked whether they had used skin-whitening products in the past 12 months. Of the 348 undergraduate females surveyed in this study, 74.4 % reported using skin-whitening products within the past year. Of this group, 2.7 % reported using injections, 2.4 % pills, 30.6 % bleaching cream, and 76.2 % soap. Illegal sources (e.g., people selling on the sides of roads) of skin-whitening products were reported by 22.8 %. The use of skin-whitening products was common in females who were not satisfied with their skin colors more so than those who were satisfied with ...
Current Opinion in Otolaryngology & Head and Neck Surgery, 2001
Advertisement. Close Window. Close Window. Thank you for choosing to subscribe to the eTOC for Cu... more Advertisement. Close Window. Close Window. Thank you for choosing to subscribe to the eTOC for Current Opinion in Otolaryngology & Head and Neck Surgery. Enter your Email address: Wolters Kluwer Health may email you ...
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Papers by Mohamed Hamid