Final answer:
The question is about the medical diagnosis of a patient with gastrointestinal symptoms and eosinophilia, likely due to a parasitic infection, considering recent immigration. The recommended tests include examination of stool samples, stool O&P exam, EIA, ELISA, and possibly PCR, to detect helminth parasites or their antigens.
Step-by-step explanation:
The question concerns a patient with gastrointestinal symptoms (GI sx), eosinophilia, and a recent history of immigration. Given these clinical signs, the appropriate tests for diagnosis would include parasitic infection screenings due to a possible helminthic infection. Since helminths can reside in the gastrointestinal tract and induce an immune response characterized by the accumulation of eosinophils, the tests should encompass ways to detect these parasites. Direct examination of stool samples across multiple days can reveal the presence of parasites or their eggs, particularly in a stool O&P (ova and parasite) exam.
Additional tests such as the Enzyme Immunoassay (EIA) and the Enzyme-Linked Immunosorbent Assay (ELISA) are used to detect antigens associated with the pathogens. Molecular analyses like Polymerase Chain Reaction (PCR) may provide more definitive results. It is also important to note that in some cases of parasitic infection, eosinophils in the blood may also indicate a current infection. Based on the eosinophilia and GI symptoms, serological tests to rule out other conditions, such as celiac disease, might also be considered, although helminthic infection appears to be the most likely diagnosis given the patient's recent immigration, which might have exposed them to environments where such parasites are more prevalent.