Final answer:
Stool specimens for serial fecal occult blood should be collected over several days using serological or molecular techniques. Immunoassays and PCR testing are common methods used to identify specific pathogens associated with bloody stools.
Step-by-step explanation:
Stool specimens for serial fecal occult blood should be collected by the patient over several days, ideally at least 7. The specimens should be processed promptly and can be analyzed using serological or molecular techniques. One common method is to perform immunoassays for certain bacteria that are associated with the production of bloody stools. Other methods like API test strips, Enterotube systems, or PCR testing can also be used to identify specific pathogens.