Nosocomial pneumonia is considered the second largest nosocomial infection, with 4 to 7 cases per 1,000 discharged patients. Due to their main morbidity and mortality, the pathogenic characteristics of pathogenic microorganisms are different from community-acquired pneumonia, hospital pneumonia, pneumonia related to mechanical ventilation, etc., and constitute a subgroup of respiratory tract infections in the respiratory system. Since nosocomial pneumonia is considered one of the 10 most common causes of death in hospitalized patients, research on this topic is very important, so it is necessary to explain the factors and antecedents that affect nosocomial pneumonia infection and the risk for the adult. Patients, and prevention is necessary the measures are to avoid many situations.Nosocomial pneumonia is considered the second largest nosocomial infection, with 4 to 7 cases per 1,000 discharged patients. Due to their main morbidity and mortality, the pathogenic characteristics of pathogenic microorganisms are different from community-acquired pneumonia, hospital pneumonia, pneumonia related to mechanical ventilation, etc., and constitute a subgroup of respiratory tract infections in the respiratory system. Since nosocomial pneumonia is considered one of the 10 most common causes of death in hospitalized patients, research on this topic is very important, so it is necessary to explain the factors and antecedents that affect nosocomial pneumonia infection and the risk for the adult. Patients, and prevention is necessary the measures are to avoid many situations.La neumonía nosocomial se considera la segunda infección nosocomial más grande, con 4 a 7 casos por cada 1.000 pacientes dados de alta. Por su principal morbilidad y mortalidad, las características patogénicas de los microorganismos patógenos son diferentes a la neumonía extrahospitalaria, la neumonía hospitalaria, la neumonía relacionada con la ventilación mecánica, etc., y constituyen un subgrupo de infecciones del tracto respiratorio en el sistema respiratorio. Dado que la neumonía nosocomial es considerada una de las 10 causas más comunes de muerte en pacientes hospitalizados, la investigación en este tema es muy importante, por lo que es necesario explicar los factores y antecedentes que afectan la infección por neumonía nosocomial y el riesgo para el adulto. Pacientes, y la prevención es necesaria Las medidas son para evitar muchas situaciones.