Diagnóstico del Helicobacter pylori: comparación entre la prueba de urease, examen histológico de bacterias curvas y el cultivo
Helicobacter pylori was investigated in 189 patients for culture, microscopic visualization of campylobacter-like organisms (CLO) and a ten minute urease test. In 136 (72%) the bacteria was isolated, and in 98 of them CLO were histologically detected. Specificity, sensitivity, positive and negative...
| Authors: | , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 1991 |
| Country: | Brasil |
| Institution: | Instituto de Medicina Tropical (IMT) |
| Repository: | Revista do Instituto de Medicina Tropical de São Paulo |
| Language: | English |
| OAI Identifier: | oai:revistas.usp.br:article/28797 |
| Online Access: | https://www.revistas.usp.br/rimtsp/article/view/28797 |
| Access Level: | Open access |
| Keyword: | Campylobacter pylori Helicobacter pylori Diagnostic Technical assay Campylobacter-like organisms Urease test |
| Summary: | Helicobacter pylori was investigated in 189 patients for culture, microscopic visualization of campylobacter-like organisms (CLO) and a ten minute urease test. In 136 (72%) the bacteria was isolated, and in 98 of them CLO were histologically detected. Specificity, sensitivity, positive and negative predictive values of microscopic visualization of CLO were: 0.77, 0.73, 0.97 and 0.51, respectively; 98 culture-positive patients were urease test positive. Specificity, sensitivity, positive and negative predictive values of the urease test were: 0.83, 0.72, 0.92 and 0.54, respectively. Comparing the urease test with culture of H. pylori combined with microscopic visualization of CLO, its specificity, sensitivity, positive and negative predictive values were: 0.95, 0.71, 0.98 and 0.48, respectively. Probably, these values are not real, since bacteria different from H. pylori could be misclassified as CLO. |
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