Bartonella henselae has recently been recognized as etiological agent of four clinical syndromes: bacillary angiomatosis, bacillary peliosis hepatis, relapsing fever with bacteremia, and cat-scratch disease. The bacterium has been isolated and fully characterized. Application of newer technologies that isolate, amplify and analyze the B. henselae DNA has helped to solve identification and diagnostic problems, and they are redefining our understanding of a few of the clinical syndromes caused by this microorganism. Over the last years, it has been recognized that population at risk for B. henselae infections has expanded from adults infected with human immunodeficiency virus to transplant patients and, later, immunocompetent adults and children. This article reviews recent information about bacteriological and epidemiological aspects of B. henselae, clinical presentation and treatment of ...

OBJECTIVE: To assess the prevalence of paragonimosis among elementary school students from three villages of Condebamba valley, Cajamarca - Perú. MATERIAL AND METHODS: 77 school-age children underwent parasitologic examination in stools, skin test and counterimmunoelectrophoresis in those positive for skin reactivity. RESULTS: From 77 skin tests performed, 2 were positive (2,6%), which were also positive by counterimmunoelectrophoresis. All 77 stool samples were negative for Paragonimus eggs. CONCLUSION: These results showed a decreasing prevalence of human paragonimiasis among Condebamba valley children.

OBJECTIVES: To assess the prevalence of E. histolytica and E. dispar in a marginal population of Callao, Lima, using ELISAs. MATERIAL AND METHODS: Two ELISAs were used, one of them for both Entamoeba species (Entamoeba-ELISA), and an E. histolytica-specific ELISA. RESULTS: 128 stool samples from randomized Callao inhabitants were microscopically examined. Thirteen (10%) were microscopically diagnosed as having E. histolytica or E. dispar infection; and 7 (6%) were positive to Entamoeba–ELISA (sensitivity = 54%). Five of the 115 samples without cysts of E. histolytica or E. dispar were Entamoeba ELISA positive (specificity = 96%). All samples were negative to the E. histolytica-specific ELISA. CONCLUSIONS: The correlation between the microscopical identification and Entamoeba-ELISA was not good, it may be due to an overvaluation of the morphological diagnosis.

Para lograr que los procesos de enseñanza y aprendizaje sean exitosos, se requiere no solo la adecuada competencia académica del profesor, sino también que los alumnos tengan la motivación y disposición requerida, así como las actitudes para que el aprendizaje sea significativo. El objetivo de la investigación fue determinar la relación entre la actitud y la percepción pedagógica con la forma de enseñanza y aprendizaje en estudiantes de Medicina del segundo año de la Universidad Nacional Mayor de San Marcos. El método que se utilizó fue cuantitativo y según el diseño metodológico fue no experimental, descriptivo, comparativo, transversal. La población de interés fue 106 estudiantes matriculados en la asignatura de Microbiología médica en el segundo semestre académico, agosto a diciembre, del año 2011. Se empleó como técnica de recolección de datos la encuesta, e...