A traveler is being evaluated at a local hospital for gastro…
A traveler is being evaluated at a local hospital for gastrointestinal pain, fever, and diarrhea. The patient has recently returned from a month-long visit to Southeast Asia. The patient has no recent history of sexual activity or IV drug use but did describe conditions of poor sanitation where they were visiting. If liver function test results were elevated and bilirubinuria was noted, which of the following would be the next logical test to order?