Field Sanitation Certification Practice Test 2025 – Comprehensive All-in-One Guide to Exam Success!

Bubonic plague is primarily transmitted through the bite of infected fleas that reside on rodents, particularly rats. These fleas act as vectors for the plague bacterium, Yersinia pestis, which can enter the bloodstream of the host when bitten. When a flea feeds on an infected rodent, it becomes capable of transmitting the bacteria to other mammals, including humans.

Rodents like rats are often found in urban environments, which has historically facilitated the spread of the plague during outbreaks. The health risks associated with managing rodent populations are significant, as fleas can quickly reproduce, and an infestation can lead to rapid transmission of the disease if not controlled effectively.

Other options, while they reference other vectors or animals, do not directly relate to the transmission dynamics of bubonic plague. Understanding the role of rats and their fleas is essential for managing and preventing outbreaks of this serious infectious disease.