Dengue and Infectious disease

Dengue noun - An infectious disease of the tropics transmitted by mosquitoes and characterized by rash and aching head and joints.

Infectious disease and dengue are semantically related. In some cases you can use "Infectious disease" instead a noun "Dengue".

Infectious disease noun - A disease transmitted only by a specific kind of contact.

Dengue and infectious disease are semantically related. Sometimes you can replace term "Dengue" with "Infectious disease", this terms are similar.