You just put your finger on one of the most intractable problems of the US healthcare system. Physicians who show ads for Botox are at least up front. In the American fee-for-service model of healthcare, many physicians are little more than the front line sales staff for the pharmaceutical industry. In that kind of environment, food borne illnesses tend to be treated as mostly uninteresting conditions because the pharmaceutical remedies are low margin - these conditions won't generate a CAT scan or anything else that will add to the health care provider's profit.

The best care I've ever received for GI trouble was in Mexico. That country's best universities train outstanding clinicians who know how to diagnose without the use of CAT scans or a hundred unnecessary blood tests. Most US GPs feel utterly lost without the wide battery of diagnostic tests. They generate revenue but cause good clinical skills to atrophy.

Thats why if I had GI trouble on an airplane, I would ask to speak to a nurse before speaking to a physician.. Nursing requires sharp clinical skills, medicine as practiced by many physicians in the US, not so much.