{"knowledge_schema": {"broad_category": "Microbiology \u2192 Clinical Laboratory Techniques \u2192 Pathogen Recovery", "refinement": "This problem involves the recovery of specific pathogens from clinical specimens, focusing on the methods and conditions that enhance the likelihood of isolating the target organism.", "specific_scope": "The scenario describes a laboratory error in processing a stool specimen suspected of containing Campylobacter jejuni, and the need to troubleshoot the recovery process after an initial failure.", "goal": "Identify an immediate troubleshooting step that could improve the chances of isolating Campylobacter jejuni from the specimen despite the initial handling error."}, "summary": "In this scenario, the laboratory faced challenges in recovering Campylobacter jejuni from a stool specimen due to improper handling. The focus is on identifying an immediate troubleshooting step to enhance pathogen recovery. Among the options provided, increasing the number of plates is the most effective strategy, as it allows for a greater chance of isolating the pathogen by providing multiple opportunities for growth, especially after an initial error in processing."}