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When considering the incorporation of Pen-Strep into cell culture media, it is important to understand its concentration and effects on cells. Typically, the standard concentration of Pen-Strep used is 100 U/mL of penicillin and 100 µg/mL of streptomycin. This concentration is deemed effective for preventing bacterial growth without significantly impacting the growth and function of most mammalian cells. However, researchers must be cautious about long-term exposure, as prolonged use can lead to altered cell behavior, antibiotic resistance, and changes in metabolic activity.


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In addition to promoting growth and improving FCR, growth medicine includes components that bolster the immune system of chickens. Healthier birds are less susceptible to diseases and, therefore, less reliant on antibiotics. Immunomodulators and vaccines are a part of this strategy, helping to establish a robust immune response against common poultry diseases. This not only improves the health of the flock but also contributes to better growth performance, as sick birds are known to have lower growth rates.


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