جداسازی لیستریا مونوسیتوژن از پنیر با استفاده از روش غنی سازی در سرما و مشاهده باکتری در کشت سلولی هلا
Authors
Abstract:
Background: Listeria monocytogenes is frequently transmitted from contaminated food such as cheese, raw vegetables, prepacked salad and etc, to humans. This bacteria can grow inter and extracellular. The aim of this study was to present a simple practical method for isolation of this bacteria from cheese, and detection of it in Hela cell culture by light microscopy Materials and Methods: In this experimental study, the sample of fresh local cheese was suspended in selective enrichment medium with yeast extract and kept at 4ºC for one week. Then, the sample was diluted with potassium hydroxide and cultured on Palkam and Listeria Selective agar. After colonies appeared, they were examined for the existance of L. monocytogenes and then were inoculated in Hela cell culture. Samples were taken intervally (12, 24, 36, 48 hrs), stained with Gimsa, detected by light microscopy and photographed. Results: This study showed that 9% of fresh local cheese was contaminated by L. monocytogenes. Pictures, taken by microscope, indicated that this bacteria in concentration more than 5x105 after 12 hours can enter into hella cells and after 48 hours lysed the host cells. Conclusion:The results of this study showed that L. monocytogenes exist in some contaminated local cheese. Contamination of dairy products by Listeria monocytogenes can occur during preparation, transport and distribution. So, because of the high consumption of these products in our country, it is necessary to specific surveillance of the production and distribution of dairy products to prevent the incidence of listeriosis in susceptible people. Keywords: L.Monocytogenes, Cheese, Intracellular Bacteria, Hela Cell Cultures Corresponding author tel: (021) 2726450 Journal of Rafsanjan University of Medical Sciences and Health Services, 2003, 2(2): 82-87
similar resources
جداسازی لیستریا مونوسیتوژن از پنیر با استفاده از روش غنی سازی در سرما و مشاهده باکتری در کشت سلولی هلا
خلاصه سابقه و هدف: لیستریا مونوسیتوژن از طریق غذاهای آلوده مانند پنیر، سبزیجات خام، سالاد آماده فروش و غیره به انسان انتقال می یابد. این باکتری قادر به رشد در خارج و در درون سلول می باشد. هدف از این مطالعه، ارائه روشی ساده و قابل اجرا جهت جداسازی این باکتری از پنیر و مشاهده آن در کشت سلولی هلا در زیر میکروسکوپ نوری بوده است. مواد و روش ها: در این مطالعه تجربی، نمونه ای از پنیر تازه محلی در محیط...
full textاثر بربرین در تنظیم آستروسیتهای Gfap+ ناحیه هیپوکمپ موشهای صحرایی دیابتی شده با استرپتوزوتوسین
Background: Diabetes mellitus increases the risk of central nervous system (CNS) disorders such as stroke, seizures, dementia, and cognitive impairment. Berberine, a natural isoquinolne alkaloid, is reported to exhibit beneficial effect in various neurodegenerative and neuropsychiatric disorders. Moreover astrocytes are proving critical for normal CNS function, and alterations in their activity...
full textاثر بربرین در تنظیم آستروسیتهای Gfap+ ناحیه هیپوکمپ موشهای صحرایی دیابتی شده با استرپتوزوتوسین
Background: Diabetes mellitus increases the risk of central nervous system (CNS) disorders such as stroke, seizures, dementia, and cognitive impairment. Berberine, a natural isoquinolne alkaloid, is reported to exhibit beneficial effect in various neurodegenerative and neuropsychiatric disorders. Moreover astrocytes are proving critical for normal CNS function, and alterations in their activity...
full textThe effect of cyclosporine on asymmetric antibodies and serum transforming growth factor beta1 in abortion-prone model of mice CBA/J x DBA/2
كچ ي هد فده و هقباس : ي ک ي طقس زورب للع زا اه ي ،ررکم ا لماوع تلاخد ي ژولونوم ي ک ا رد ي ن قم طققس عون ي وراد دقشاب ي س ي روپسولک ي ،ن ح لدم رد طقس شهاک بجوم ي ناو ي CBA/j×DBA/2 م ي تنآ ددرگ ي داب ي اه ي ان و راققتم TGF-β لماوع زا عت مهم يي ن گلماح تشونرس هدننک ي سررب روظنم هب رضاح هعلاطم تسا ي ات ث ي ر اس ي روپسولک ي ن م رب ي از ا ي ن تنآ عون ي داب ي س و اه ي اکوت ي ن TGF...
full textThe Study of Stressful Factors in Clinical Education for Nursing Students Studying in Nursing and Midwifery College in Khorramabad
کچ هدي پ شي مز هني فده و : شزومآ لاب يني شخب ساسا ي شزومآ مهم و راتسرپ ي تسا . و هنوگ ره دوج لکشم ي شزومآ رد لاب يني ، آراک يي هدزاب و ا ني شزومآ زا شخب راچد ار لکشم م ي دنک . فده اب رضاح شهوژپ سررب ي لماوع سرتسا از ي شزومآ لاب يني رد وجشناد ناي راتسرپ ي هدکشناد راتسرپ ي و يامام ي ماـجنا داـبآ مرـخ تسا هتفرگ . شور و داوم راک : رضاح هعلاطم کي هعلاطم صوت يفي عطقم ي تسا . د...
full textMy Resources
Journal title
volume 2 issue 2
pages 82- 87
publication date 2003-06
By following a journal you will be notified via email when a new issue of this journal is published.
No Keywords
Hosted on Doprax cloud platform doprax.com
copyright © 2015-2023