Which of the following diseases is NOT spread by ticks?

Chagas disease is primarily caused by the Trypanosoma cruzi parasite, which is transmitted to humans through the bite of triatomine bugs, often referred to as "kissing bugs." This disease is endemic to certain regions in the Americas and is not associated with ticks.

In contrast, Rocky Mountain spotted fever, Lyme disease, and Anaplasmosis are all diseases that are transmitted through tick bites. Understanding the vectors responsible for the transmission of various diseases is crucial in pest control and public health. Chagas disease's association with insects other than ticks underscores the importance of identifying the specific vectors linked to each disease in order to implement effective prevention and control measures.