The Texas State Historical Association states that examples of endemic diseases include syphilis, bacillary dysentery, tuberculosis, different types of pneumonia and influenza. According to Mosby's Medical Dictionary, an endemic disease is defined as a frequently occurring infectious disease that is specific to a geographical area.
Endemic diseases often take place in cycles, states Mosby's Medical Dictionary. The infectious disease is transmitted either directly or indirectly and takes place at the normal expected rate.
The Texas State Historical Association notes that endemic diseases occur in a small percentage of the population, while a majority of individuals show no signs of the illness. The spread of endemic disease is linked to human contact, crowding and widespread immunity. Traveling from one location to another increases the spread of the disease, while isolating those who are infected decreases the chances of the disease spreading. It's not unusual for the endemic diseases occurring in one part of the world to be similar to those occurring in another part of the world.
Examples of variables that contribute to the chance of an endemic disease occurring include geographic features, high local levels of chemicals, rural occupations, isolation and climate conditions, states the Texas State Historical Association. Some of the most common carriers of disease include fleas, lice, mosquitoes and ticks.