Fig. 1From: Crohn’s disease: failure of a proprietary fluorescent in situ hybridization assay to detect M. avium subspecies paratuberculosis in archived frozen intestine from patients with Crohn’s disease.From a sample of intestine from a patient with Crohn’s disease. a DAPI; b Texas Red (IS900 an insertion sequence unique to M. avium subspecies paratuberculosis.); c Cy-5 (Human β-actin; a housekeeping control gene) d composite of a–c. Note “positive” signal in the “with-probe” in Fig. 1 panels b–d. Marker bars in µm indicates magnification of × 40Back to article page