Azizollah Ebrahimi
Department of Pathobiology, School of Veterinary Science, Shahrekord University, Shahrekord, Iran
[ 1 ] - Biofilm formation, hemolysin production and antimicrobial susceptibilities of Streptococcus agalactiae isolated from the mastitis milk of dairy cows in Shahrekord district, Iran
Streptococcus agalactiae is a major contagious pathogen causing bovine sub-clinical mastitis. The present investigation was carried out to determine some phenotypic characteristics of the S. agalactiae strains isolated from bovine mastitis cases in dairy cows of Shahrekord in the west-center of Iran. One hundred eighty California mastitis test (CMT) positive milk samples were ...
[ 2 ] - بررسی اثر مهاری نانو ذره اکسید روی در تشکیل بیوفیلمِ برخی باکتری‌های بیماری‌زای غذازاد
زمینه و اهداف: یکی از مسائل مهم در صنعت غذا، تشکیل بیوفیلم میکروبی است که میتواند منبع بالقوه آلودگی و عامل انتقال باکتری‌های عامل فساد و بیماری‌زای غذازاد باشد. این مطالعه با هدف بررسی اثر مهاریِ نانوذره اکسید روی در تشکیل بیوفیلم برخی باکتری‌های بیماری‌زای غذازاد انجام گرفته است. مواد و روش کار: در این مطالعه که در سال ۱۳۹۴ انجام شد، حداقل غلظت مهارکنندگی رشد نانوذره اکسید روی علیه اشریشیا کل...
[ 3 ] - مطالعه برخی خصوصیات استافیلوکوکسیهای جدا شده از شیر میشهای مبتلا به ورم پستان تحت بالینی در شهرکرد، ایران
مقدمه: استافیلوکوکسیها آنزیمهای فراوانی در محیط آزاد میکنند که برخی از آنها نظیر کوآگولاز، بتا لاکتاماز، همولایزینها و بیوفیلمها جزء اندیسهای بیماری زایی این باکتریها محسوب می شوند. هدف مطالعه حاضر، جداسازی و تشخیص استافیلوکوکوس اورئوس و استافیلوکوکوسهای کوآگولاز منفی از گوسفندان مبتلا به ورم پستان تحت بالینی و آزمایش تولید بیوفیلم، بتالاکتاماز و همولایزینها و نیز الگوی...
[ 4 ] - Effects of Sub-Minimum Inhibitory Concentrations of Silver Nanoparticles on Some Virulence Factors of Staphylococcus aureus
ABSTRACT Background and Objectives: Silver nanoparticles (AgNPs) have physical and surface properties that could threaten human and environmental health. AgNPs are classified as ‘very toxic’ to eukaryotic organisms and are less toxic to bacteria. The aim of the present study was to study the effects of different sub-minimum inhi...
[ 5 ] - Biosurfactant Producing Bacteria on Oily Areas of Ruminant Skin
Biosurfactants are surface-active compounds produced by microorganisms. In this study, we collected 60 inguinal area and ear canal samples from cows, sheep, and goats (each, 10 animals) and screened for biosurfactant-producing bacteria. We also determined the genera of culturing strains. Fifty six hemolytic bacterial strains (27, 22 and 7, from cows, sheep and goats, respectively) were i...
[ 6 ] - Antimicrobial Activities of Isolated Endophytes from Some Iranian Native Medicinal Plants
Random samples from asymptomatic leaves and branches of five native medicinal plants: Stachys lavandulifolia, Rumex pulcher, Hypericum scabrum, Starja bachteriarica and Achillea kellalensis were collected from Chaharmahal province of Iran and examined for the presence of endophytic bacteria and fungi with biological activity. From 8 isolated endophytic ...
[ 7 ] - Evaluation of Anti biofilm and Antibiotic Potentiation Activities of Silver Nanoparticles Against some Nosocomial Pathogens
Nowadays silver nanoparticles (AgNPs) are used as antimicrobial due to its well known physical, chemical, and biological properties. A large collection of bacterial cells adhering to a surface is called bacterial biofilm. Exposure to silver nano particles (AgNPs) may prevent colonization of new bacteria onto the biofilm. In the present work, we have investigated whether the biofilm format...
[ 8 ] - Evaluation of The Effects of Allium Jesdianum Bacterial Endophytes on Some Bacterial and Fungal Pathogens
Background and Objective: The endophytes are the fungi or bacteria that live within a plant in a symbiotic relationship. This study aimed to investigate the effect of isolated bacterial endophytes from Allium jesdianum on some bacterial pathogens such as Staphylococcus aureus, Escherichia coli as well as pathogenic fungi, including Trichophyton mentagrophytes and Candida albicans. Materials an...
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