• Hossein Khavari-Daneshvar, Maryam Mosavi, Hamid Khodayari, Ebrahim Rahimi, Peyman Ranji, Amir Hossein Mohseni, Reyhaneh Mahmudian, Farzad Shidfar, Shahram Agah, and Ali Mohammad Alizadeh.
• Cancer Research Center, Tehran University of Medical Sciences, Tehran, Iran.
• Turk J Med Sci. 2017 Apr 18; 47 (2): 689-694.

Background/AimThirty male BALB/c mice were equally divided into three groups: control, L. acidophilus, and B. bifidum for the assessment of the probiotics' stability in the gut microflora.Materials And MethodsFirst, the gut microflora of the mice was checked every 3 days (days 3, 6, 9, and 12) without probiotic consumption, and then the mice were daily given orally 1.5 g of probiotics in 30 cc of drinking water. The consumption of probiotics was then stopped for recovery and then the consumption continued for 5 months.ResultsOn day 9 after the consumption of the probiotics, L. acidophilus and B. bifidum were significantly increased from 4% to 83% and from 1% to 61%, respectively. L. acidophilus count showed no significant decrease at the end of 5 months compared to day 9 of probiotic consumption (74%), but B. bifidum count was dramatically decreased to 45% and 36% at the end of 1 and 5 months, respectively.ConclusionOur results revealed that, unlike B. bifidum, the amount of L. acidophilus remained almost unchanged in the long term, indicating more stability of L. acidophilus than B. bifidum in the gut microflora.

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