Zagazig University Digital Repository
Home
Thesis & Publications
All Contents
Publications
Thesis
Graduation Projects
Research Area
Research Area Reports
Search by Research Area
Universities Thesis
ACADEMIC Links
ACADEMIC RESEARCH
Zagazig University Authors
Africa Research Statistics
Google Scholar
Research Gate
Researcher ID
CrossRef
Antimicrobial and antibiofilm potentials of cinnamon oil and silver nanoparticles against Streptococcus agalactiae isolated from bovine mastitis: new avenues for countering resistance
Faculty
Veterinary Medicine
Year:
2021
Type of Publication:
ZU Hosted
Pages:
Authors:
Norhan Khayry Abdelaziz Mahmoud
Staff Zu Site
Abstract In Staff Site
Journal:
BMC Veterinary Research BMC
Volume:
Keywords :
Antimicrobial , antibiofilm potentials , cinnamon , , silver nanoparticles
Abstract:
Background: Streptococcus agalactiae (S. agalactiae) is a contagious pathogen of bovine mastitis. It has financial implications for the dairy cattle industry in certain areas of the world. Since antimicrobial resistance increases in dairy farms, natural antimicrobials from herbal origins and nanoparticles have been given more attention as an alternative therapy. Hence, this study reported the antimicrobial and antibiofilm potentials of cinnamon oil, silver nanoparticles (AgNPs), and their combination against multidrug-resistant (MDR) S. agalactiae recovered from clinical bovine mastitis in Egypt. Results: Our findings revealed that 73% (146/200) of the examined milk samples collected from dairy cows with clinical mastitis were infected with Streptococci species. Of these, 9.59% (14/146) were identified as S. agalactiae and categorized as MDR. S. agalactiae isolates expressed four virulence genes (Hyl, cylE, scpB, and lmb) and demonstrated an ability to produce biofilms. Cinnamon oil showed high antimicrobial (MICs ≤ 0.063 μg /mL) and antibiofilm (MBIC50 = 4 μg/mL) potentials against planktonic and biofilms of S. agalactiae isolates, respectively. However, AgNPs showed reasonable antimicrobial (MICs ≤16 μg/mL) and relatively low antibiofilm (MBIC50 = 64 μg/mL) activities against screened isolates. Synergistic antimicrobial or additive antibiofilm interactions of cinnamon oil combined with AgNPs were reported for the first time. Scanning electron microscope (SEM) analysis revealed that biofilms of S. agalactiae isolates treated with cinnamon oil were more seriously damaged than observed in AgNPs cinnamon oil combination. Moreover, reverse transcriptase quantitative polymerase chain reaction (RT-qPCR) showed that cinnamon oil exerted a remarkable down-regulation of pili biosynthesis genes (pilA and pilB) and their regulator (rogB) against S. agalactiae biofilms, meanwhile the AgNPs cinnamon oil combination demonstrated a lower efficacy.
Author Related Publications
Norhan Khayry Abdelaziz Mahmoud, "Mutations of domain V in 23S ribosomal RNA of macrolide-resistant Mycoplasma gallisepticum isolates in Egypt", Open Learning on Enteric Pathogens, 2016
More
Norhan Khayry Abdelaziz Mahmoud, "Propidium Monoazide Quantitative Real-Time Polymerase Chain Reaction for Enumeration of Some Viable but Nonculturable Foodborne Bacteria in Meat and Meat Products", Mary Ann Liebert, Inc., 2018
More
Norhan Khayry Abdelaziz Mahmoud, "Class 1 integron and associated gene cassettes mediating multiple-drug resistance in some food borne pathogens", Malaysia, 2016
More
Norhan Khayry Abdelaziz Mahmoud, "حلقة نصاب الاستشعار الهرمى المعقد تنظم التعبير الجينى للفينازين فى السيدوموناس ايروجينوزا", The Journal of Infection in Developing Countries, 2016
More
Norhan Khayry Abdelaziz Mahmoud, "تلازم محددات المقاومة للكينولون بواسطة البلازميد و AmpC بيتا لاكتاماز فى عترات الاشرشيا كولاى فى مصر", Cellular and Molecular Biology, 2016
More
Department Related Publications
Ahlaam Abd Al Aziz Gharieb Ibrahim, "Association of Plasmid-Mediated Quinolone Resistance with AmpC- Beta-Lactamase Producing E. coli strains from Different Sources", Zagazig Univerisity, 2014
More
Iman Ibrahim Attia Sweilem, "The presence of toxin genes of Clostridium perfringens isolated from camels and humans in Egypt. تواجد جينات السموم في المطثية الحاطمة المعزولة من الإبل والآدميين بمصر", كلية الطب البيطرى كرواتيا, 2010
More
Iman Ibrahim Attia Sweilem, "Isolation of Staphylococcus aureus from milk and human with reference to its survival on surfaces. عزل المكور العنقودى الذهبى من الحليب والآدميين مع الإشارة لبقائها على الأسطح.", كلية الطب البيطرى - جامعة الزقازيق, 2013
More
Lamia Mohammad Reza Mohammad Noman, "Studies on Antibiotic Resistance of Escherichia coli isolated from poultry and children", Sues Canal Vet. Med. J, accepted for publication (2013), 2013
More
Lamia Mohammad Reza Mohammad Noman, "Bacteriological studies of Salmonella typhimurium isolated from cow calves and lambs", Assiut Vet. Med. J. Vol. 60 No. 140 January 2014, 2014
More
جامعة المنصورة
جامعة الاسكندرية
جامعة القاهرة
جامعة سوهاج
جامعة الفيوم
جامعة بنها
جامعة دمياط
جامعة بورسعيد
جامعة حلوان
جامعة السويس
شراقوة
جامعة المنيا
جامعة دمنهور
جامعة المنوفية
جامعة أسوان
جامعة جنوب الوادى
جامعة قناة السويس
جامعة عين شمس
جامعة أسيوط
جامعة كفر الشيخ
جامعة السادات
جامعة طنطا
جامعة بنى سويف