Respiratory Tract Infections
Epidemiology / / April 24, 2016
causative agent of this group are located in the airway mucosa.In some diseases, while maintaining the primary location, they bloodstream or otherwise penetrate the various organs and tissues.Because the body's pathogen is released with a jet of air, especially during the conversation, coughing and sneezing.Droplets mucus, exudate, necrotic epithelial particles containing the pathogen, depending on the size and other factors, more or less long time remain suspended in the air and deposited on the various objects in the human environment, and where dry.In the dry state, in the form of dust contents often droplets into the air again.
Thus, in the next (susceptibility) pathogen organism falls with the inhaled air in the contents of the droplets (droplet infection) or, more rarely, with dust particles (dust) infection.It is clear that infection is possible when the dust diseases, agents which are able to withstand desiccation (tuberculosis, diphtheria, etc.).
Much less there are other ways of infection.
mechanism of transmission of respiratory infections (drip or dust) is made exceptionally easy.Infection mostly occurs at fleeting communion of the patient and susceptible people.
respiratory tract infections tend to spread very widely.Diseases many of them difficult to avoid, and some people suffer from infections throughout life many times.
important epidemiological features of a number of respiratory tract infections is high coverage of children in the first years of life.It is no accident so many diseases in this group have long been given the name of childhood infections.Some researchers still tend to explain these relationships a higher susceptibility of children compared with adults.In fact, a sharp difference of disease due to the presence of immunity in adults, acquired in childhood.
For this group of infections are characterized by the cyclical ups and reduce morbidity for several successive years, and within the year.