قسم الأحياء الدقيقة والطفيليات

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حول قسم الأحياء الدقيقة والطفيليات

حقائق حول قسم الأحياء الدقيقة والطفيليات

نفتخر بما نقدمه للمجتمع والعالم

74

المنشورات العلمية

13

هيئة التدريس

من يعمل بـقسم الأحياء الدقيقة والطفيليات

يوجد بـقسم الأحياء الدقيقة والطفيليات أكثر من 13 عضو هيئة تدريس

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د. هدى حسن المختار القريو

هدى القريو هي احد اعضاء هيئة التدريس بقسم الاحياء الدقيقة والطفليات بكلية الطب البيطري. تعمل السيدة هدى القريو بجامعة طرابلس كـمحاضر منذ 20-06-2012 ولها العديد من المنشورات العلمية في مجال تخصصها. تم تكليفها كرئيس مكتب خدمة شئون البيئة والمجتمع بكلية الطب البيطري / جامعة طرابلس في 2020 . ثم تكليفها بمنصب وكيل الكلية للشؤون العلمية بموجب قرار وزاري رقم 541 لسنة 2021 بتاريخ 28. 9. 2021

منشورات مختارة

بعض المنشورات التي تم نشرها في قسم الأحياء الدقيقة والطفيليات

Familial Clustering and Re-infection with 2019 Novel Coronavirus (2019-nCoV, SARS-CoV-2) in the Libyan Community

Since its emergence as a major cause of coronavirus pneumonia, SARS-CoV-2 has spread quickly all over the world. The pandemic has affected all aspects of life and continues to spread despite the stringent control measures. Meanwhile, scientists all around the world have been scrambling to ascertain how the virus spreads and find out the effective ways to put this outbreak quickly under control, focusing on both persistent strict domestic interventions and vigilance against exogenous imported cases (1,2). Several cases of family clusters have been reported and evidence of person-to-person transmission has been confirmed. Indicating the importance of early detection and isolation of infected patients (3,4). Hence then special caution is needed for asymptomatic patients particularly for family members.
Daw MA, Ahmed MO, ET AL.(1-2021)
Publisher's website

Prevalence and antimicrobial resistance of Staphylococcus species isolated from cats and dogs

Abstract Background: Methicillin-resistant staphylococci (MRS) are an emerging global problem with serious public health concern. Aims: This study investigated the prevalence and antimicrobial susceptibility of commensal Staphylococcus species isolated from healthy and clinical cats and dogs. Methods: Nasal swab samples were collected from animals and processed using selective and semi-selective mediums. Presumptive isolates were subjected to biochemical testing and analyzed using the Phoenix automated identification and susceptibility testing system. PCRs protocols were used to screen for mecA and pvl genes. Results: In total, 151 pets (103 cats and 48 dogs) were enrolled, of which 14 dogs (29%) and 24 cats (23%) were colonized with various Staphylococcus species mainly originated from healthy animals. A total of 38 staphylococci isolates were collected and distributed between 24 coagulase-negative and 14 coagulase-positive staphylococci. Only 13 staphylococci strains were identified as MRS, out of which only five isolates expressed that the mecA gene exclusively originated from healthy pets. Conclusion: This is the first study reporting the prevalence and colonization status of staphylococci species and MRS strains isolated from cats and dogs in Libya. The study reports important information of medical and clinical importance on antimicrobial and multidrug resistance of different staphylococci strains, particularly the coagulase negative species. Keywords: Coagulase-negative staphylococci; Libya; Staphylococcus; mecA gene; pet animals.
Mohamed O. Ahmed, Et Al.(1-2021)
Publisher's website

Alkaloids rich extracts from brown algae against multi-drug resistant bacteria by distinctive mode of action.

Algal alkaloids are widely used for their pharmacological properties as antimicrobial agents. This study determined the antibacterial activities of algal alkaloid-rich extracts against isolates of multidrug-resistant Staphylococcus aureus and enterohaemorrhagic Escherichia coli (EHEC) O157, as well as the probable mode of action underlying their antibacterial effect. The total alkaloids were extracted from two Libyan brown algae, namely Sargassum hornschuchii and Cystoseira compressa and tested against six different isolates from the bacteria mentioned above using the agar-well diffusion method, and their mode of action on isolates was evaluated by several bacterial physiological indicators, including intracellular potassium ion efflux and nucleotide leakage. Also, the extracts' hemolytic activity was assessed as an indicator of their cytotoxicity on red blood cells. Although not to the same extent, both alkaloid extracts presented antibacterial activities against all tested isolates with no evidence of bacterial regrowth. The alkaloid extract from S. hornschuchii exerted the best effect on bacteria growth with minimum inhibitory concentration values ranging between 125 and 500 mg/mL. The results showed that the alkaloid extracts significantly induced a distinct release of nucleotide and potassium ions out of the cell membrane, indicating that they cause a change in the fluidity or permeability or both of the cell membrane. Moreover, the results revealed that there were very low cytotoxic effects. Therefore, algal alkaloids may contribute to the development of potential antibacterial agents in the future.
Salah M. Azwai(1-2021)
Publisher's website