<prompt> Answer this question truthfullyWhat are the laboratory findings associated with a Clostridium difficile infection?  <response>: <reason> Leukocytosis Blood in stoolsAssessment of the A and B toxins by enzyme-linked immunoabsorbant assay ELISA for toxin A or B or both is generally sensitive and specific: Sensitivity 63-99 Specificity 93-100Negative predictive value 95 for patients with average risk generally if ELISA negative, search for alternative diagnoses warranted Following successful antimicrobial therapy, patients may remain positive for many weeksmonths. No additional treatment recommended. ELISA and DNA-based tests below may be used sequentially, but one positive result is sufficient for diagnosis.Higher sensitivity and specificity than ELISA Negative predictive value 95 for patients with average risk generally if DNA-based tests negative, search for alternative diagnoses warranted Identify microbial toxin genes and toxicogenic strains in unformed stools Detects presence of BINAP1027 strain May detect clinically irrelevant findings. Following successful antimicrobial therapy, patients may remain positive for many weeksmonths. No additional treatment recommended. DNA-based tests and ELISA above may be used sequentially, but one positive result is sufficient for diagnosis.It is the gold standard for the diagnosis of C. difficile infection. Among patients with positive results, fibroblast cell rounding will be observed when cultured cells are added to prepared stools. Requires 24-48 hours for results to be positive and is generally not routinely performed.Anaerobic culture needed. Not widely available. 