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The biochemical test for Salmonella typhimurium typically includes testing for hydrogen sulfide (H2S) production, urease activity, and the fermentation of carbohydrates. On MacConkey agar, Salmonella typhimurium appears as pale colonies due to its inability to ferment lactose. Additionally, it can reduce sulfur to H2S, which can be detected on triple sugar iron (TSI) agar as a black precipitate. Other tests include checking for indole production and citrate utilization.

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1mo ago

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