Which term represents cases of a disease present at any point in time?

The term that represents cases of a disease present at any point in time is prevalence. Prevalence refers to the total number of existing cases of a disease within a specific population at a given time, regardless of when the cases occurred. This measure provides an understanding of how widespread a disease is within a population and can include both new and pre-existing cases.

In contrast, incidence refers specifically to the number of new cases of a disease that occur in a specified period. It focuses on measuring the risk of contracting the disease over a certain time frame rather than capturing all existing cases.

An epidemic refers to an increase in the number of cases of a disease above what is normally expected in a population within a particular area. Endemic describes a disease or condition that is regularly found and consistently present in a particular geographic area.

Thus, prevalence is the appropriate term for identifying the total burden of a disease at any given time, making it the correct choice in this context.