ABSTRACT
OBJECTIVES: To assess the usefulness of HELISAL in the diagnosis of Helicobacter pylori infection by comparing it with ELISA, JATROX and histopathologic findings. EXPERIMENTAL DESIGN: Randomized prospective study. PATIENTS: Sixty-one patients, thirty-three males and twenty-eight females, 18-73 years old, submitted to esophagogastroduodenoscopy. RESULTS: The sensitivity of HELISAL when compared to ELISA test was 60.8%, the specificity 73.3%, the positive predictive value 87.5%, the negative predictive value 37.9%, and the kappa index 0.26. When compared to histopathologic test: sensitivity 60.9%, specificity 65%, positive predictive value 78.1%, negative predictive value 44.7%, kappa 0.28. When compared to JATROX, sensitivity 57.7%, specificity 62.5%, positive predictive value 81.2%, negative predictive value 34.4%, kappa 0.21. CONCLUSION: The sensitivity of HELISAL test is lower than that of other compared tests, and the negative predictive value is very low. The specificity and the positive predictive value are higher than the sensitivity. The kappa index shows a very low concordance.
Subject(s)
Bacterial Typing Techniques , Helicobacter Infections/diagnosis , Helicobacter pylori/isolation & purification , Adult , Aged , Enzyme-Linked Immunosorbent Assay , Female , Helicobacter Infections/blood , Helicobacter Infections/pathology , Humans , Male , Middle Aged , Prospective Studies , Sensitivity and SpecificityABSTRACT
An ultrastructural study of the nasal placode of chick embryos between the stages 16 to 24 of Hamburger-Hamilton was made. The study describes the disposition of the constituent elements as well as their characteristics.
Subject(s)
Central Nervous System/embryology , Chick Embryo , Ectoderm/ultrastructure , Olfactory Pathways/embryology , Animals , Cell Movement , Epithelial Cells , Epithelium/ultrastructure , Intercellular Junctions/ultrastructure , MorphogenesisABSTRACT
A study of the median artery has been done on 40 forearms, using anatomical and radiological methods. Of the points studied, the following are of particular interest: the mode of origin and the systematization of the various types.
Subject(s)
Arteries/anatomy & histology , Forearm/blood supply , Angiography , Forearm/diagnostic imaging , HumansABSTRACT
Cells of nasal placode of chick embryos were studied with thymidine H3 and autoradiography. Our results shown, that the nuclei in the nasal placode synthesize DNA in the outer zone, then migrate toward the inner zone to undergo division and subsequently return to the outer zone.
Subject(s)
Central Nervous System/embryology , Olfactory Pathways/embryology , Animals , Chick Embryo , Mitosis , Olfactory Pathways/cytologyABSTRACT
Interkinetic nuclear migration was studied in cells forming the auditory placode of chick embryos with thymidine H3 and autoradiography. Our results show, that the nuclei in the auditory placode, synthesize D.N.A. in the outer zone, then migrate toward the inner zone to undergo division and subsequently return to the outer zone.
