Food security and the vulnerability among indigenous and peasant populations has become a topic of interest to public health all around the world, leading to the investigation about measurement, classification and factors that determine it. This systematic review aims to describe the situation of food security in indigenous and peasant communities, and the methods used for evaluation. The literature search was performed on the Pub Med (5), ScienceDirect (221) and Scopus (377) databases searching for publications between 2004 and 2015, a total of 603 items were located with the search engines. At the end of the screening process and after adding the items found in the gray literature, 25 papers were obtained to write the review. In the 11 years evaluated between 2004 and 2015, scientific activity around the theme was poor with just 4.54% of the publications on this subject, but for 2011 the percentage increased to 13 publications, 63%. Various factors that influence the development of food insecurity are climate change, the diversity of agriculture, globalization and market westernization.
El Streptococcus spp ha adquirido mucha importancia a nivel mundial debido a la gran patogenicidad de sus diferentes especies. Una de ellas es el Streptococcus del Grupo B que comúnmente se encuentra a nivel vaginal en mujeres embarazadas, lo que puede ocasionar una contaminación al recién nacido en el momento del parto. Solo un pequeño porcentaje de estos neonatos desarrollan la infección y pueden llegar a presentar sepsis, meningitis, neumonía neonatal, entre otras complicaciones, así como secuelas neurológicas permanentes, retraso en el crecimiento y muerte. Debido a esto, se han implementado estrategias preventivas, en las que se incluyen pruebas de tamizaje para su detección temprana y evitar el riesgo de infección. En las últimas décadas se ha incrementado el uso de técnicas moleculares para su diagnóstico precoz y tratamiento temprano, de manera de disminuir la morbimortalidad atribuida al Streptococcus del Grupo B.
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