контекст - это что-то типо того: Sufficient amounts of E. coli, Lactobacilli and Bifidobacteria appear to be present in the stool. Ample amounts of E. coli have been associated with a balanced gut flora. The "friendly bacteria" are important for gastrointestinal function, as they are involved in vitamin synthesis, natural antibiotic production, immune defense, digestion, detoxification of pro-carcinogens and a host of other activities. Maintaining these levels is important for supporting the health of the digestive system. Supplementation might be considered in selected cases where Lactobacilli are in the low range of normal. Ideally, levels of Lactobacillus and E. coli should be 2+ or greater. Bifidobacteria being a predominate anaerobe should be recovered at levels of 4+. так вот, по вашему вопросу могу предположить, что имеется в виду необходимость восстановления количества бифидобактерий на уровне >10(4).
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