What environmental factor appears to favor the occurrence of E. tarda septicemia in fish and human infections?
Answer
High water temperatures during summer and autumn months.
There is a notable parallel in the environmental drivers influencing the incidence of Edwardsiella tarda infections across both aquatic hosts and humans. Specifically, high water temperatures have been shown to favor the development of septicemia in many fish species within the United States. This finding correlates directly with observations in subtropical and tropical regions where human cases of severe bacteremia often peak during the warmer summer and autumn months. This environmental signature suggests that warmer temperatures act as a consistent multiplier for exposure risk via the aquatic environment for both farmed animals and humans consuming raw aquatic products.

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