[Classification of dengue hemorrhagic fever using decision trees in the early phase of the disease].

Introduction: dengue is a viral disease with endemic behavior. At the beginning of the illness it is not possible to know which patients will have an unfavorable evolution and develop a severe form of dengue. However, some warning symptoms and signs may be present.

[Community-based survey on knowledge and perceptions about dengue and preventive practice in Lisa municipality, City of Havana province].

Introduction: the population's knowledge is important to develop participatory processes that support the reduction of Aedes aegypti.

Objectives: to identify sociodemographic factors, knowledge, perceptions and practice in the population of three people's councils in Lisa municipality about Aedes aegypti control and dengue prevention; to determine the association of these sociodemographic factors with the adequate level of knowledge about dengue, and relate the implementation of suitable practice to risk knowledge and perceptions.

Methods: cross-sectional study was conducted in which surveys and an observational guide were applied to a randomized sample of individuals living in the selected areas.