What dietary habit might indicate a tapeworm infection in a client?

The consumption of sushi may indicate a tapeworm infection, particularly if the sushi contains raw or undercooked fish, which can be a source of certain types of tapeworms, such as the fish tapeworm (Diphyllobothrium latum). These tapeworms can be contracted through the ingestion of live larvae present in the flesh of infected fish. When individuals consume sushi that is not prepared properly or if it includes fish that harbors these parasites, they increase their risk of tapeworm infection.

In evaluating the other dietary habits: the consumption of raw beef might suggest the potential for infection with certain types of worms like Taenia saginata, but it is not as broadly recognized as a direct indicator of tapeworm infection as sushi is for fish tapeworms. A high-fiber diet is generally healthy and not associated with an increased risk of tapeworm infestation. Frequent dairy intake also does not correlate with a tapeworm infection in any significant way, as dairy products typically do not contain parasites associated with tapeworms. Thus, focusing on the consumption of sushi highlights a specific dietary risk that can lead to infection.