شناسایی گونه‌های سالمونلا در فرآورده‌های خام مرغ با استفاده از کاوشگر اختصاصی به کمک روش Real Time PCR

مجله پژوهشهای علوم و صنایع غذایی ایران

دوره 18، شماره 5 - شماره پیاپی 77، آذر و دی 1401، صفحه 589-601   

نوع مقاله: مقاله پژوهشی فارسی

شناسه دیجیتال (DOI): 10.22067/ifstrj.2022.74447.1129

نویسندگان

کبری تاجیک طوغان¹؛ محمد رضا عدالتیان دوم^{* 2}؛ سید علی مرتضوی²؛ علی جوادمنش³

¹گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران

²گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران.

³گروه علوم دامی دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران.

چکیده

هدف از انجام این پژوهش، شناسایی گونه‌های سالمونلا در فرآورده‌های مرغ با تکیه بر روش Real time PCR است. بدین منظور، تعداد 45 نمونه از فرآورده‌های ماکیان که شامل سینه، کبد و سنگدان مرغ بودند از نقاط مختلف شهر مشهد و از شرکت‌های گوناگون خریداری و با رعایت موازین بهداشتی به آزمایشگاه انتقال داده شدند. طبق استانداردهای ایران و بین‌المللی، در 25 گرم از ماده غذایی، نباید هیچ سالمونلایی وجود داشته باشد. بدین منظور، 25 گرم از هر یک از نمونه‌ها جدا شده و تحت شرایط استریل به‌خوبی هموژن شدند و استخراج DNA صورت گرفت. به‌منظور تایید، DNA استخراج شده توسط الکتروفورز ژل آگارز مورد ارزیابی قرار گرفت. خلوص و کمیت DNA استخراج شده هر یک از نمونه‌ها توسط طیف‌سنجی نوری مورد بررسی قرار گرفت. در مرحله بعد به‎منظور شناسایی جنس سالمونلا، نمونه‎ها ‎توسط روشReal time PCR  مورد بررسی قرار گرفتند. نتایج حاصل از Real time PCR نشان داد که از مجموع 45 نمونه، 9 نمونه آلوده به جنس سالمونلا می‌باشد. سپس این 9 نمونه، از نظر آلودگی به گونه‌های سالمونلا تیفی موریوم و سالمونلا انتریتیدیس مورد ارزیابی قرار گرفتند که برای این منظور از روش PCR معمولی استفاده شد. نتایج نشان داد از تعداد 9 نمونه که در تست Real time PCR مثبت تشخیص داده شده بود، تعداد 7 نمونه آلوده به سالمونلا تیفی موریوم بوده که از این 7 نمونه، 5 مورد مربوط به سینه مرغ و 2 مورد مربوط به کبد بود و از نظر آلودگی به سالمونلا انتریتیدیس از تعداد 9 نمونه، تنها یک نمونه آلوده بود که مربوط به سینه مرغ می‌باشد.

کلیدواژه‌ها

سالمونلا؛ سالمونلا تیفی موریوم؛ سالمونلا انتریتیدیس؛ گوشت مرغ؛ Real Time PCR

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