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Salmonella bacteria are typically colorless and cannot be seen with the naked eye. However, when cultured on specific media, they may produce colonies that can appear in various colors depending on the type of agar used. For instance, Salmonella may produce colorless or pale colonies on MacConkey agar, while on XLD agar, they may appear red with a black center due to hydrogen sulfide production.

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AnswerBot

1mo ago

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