The importance of the surrounding environment and ecological microcosms to determine identification of mites in this particular polyester toys because these objects have the necessary criteria survival and reproduction of different kinds of mites, most people have them and are propitious source so that people can develop atopic vulnerably or exacerbate allergic reactions. Objective: To identify dust mites on polyester toys. Materials and methods. This work is descriptive, cross-section. Period: January to February 2021. Study population: 55 toys Polyester, 51 samples were observed under a microscope Karl Zeiss stereoscope, we used the method of Hart and Fain. Results. Mite Dermatophagoides pteronyssinus was the most identified, appeared in 30 (58.8%) positive samples.

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Introduction: The breast cancer is from the 2006 first cause of death by malignant neoplasies in México. The survival of the mammary carcinoma depends mainly on the preventive actions that are carried out; due to the lack of technological infrastructure in our country, the herself breast exploration, is the method more used and recommended for the opportune detection of the Cancer (CaMA). Objective: Knowledge of NOM-041-SSA2-2011 in health students. Material and Methods: A study non comparative to 105 students was made descriptive, cross-sectional applying them to a questionnaire that included social-demographic variables and questions with respect to the correct application of the herself exploration technique as well as questions about the practice, personal opinion of the same one and with base to the NOM-041-SSA2-2011; In the application test on line date April – May 2021. Results: With respect to the level of knowledge with function to the ages, the level between the 18 and the 20 years was deficient with respect to herself breast exploration (CaMA). It is important note that with respect to the scholastic degree there was a deficient level of knowledge about of the breast exploration in the second and 6 to fourth month period in the students of the area of the health.