Which type of flea is identified as an important disease vector?

• A. Cat fleas
• B. Rodent fleas
• C. Dog fleas
• D. Human fleas

Answer: (B)

Fleas can spread disease by picking up pathogens from an infected animal and delivering them to others during feeding. Rodent fleas are especially important because they live on rats and other wild rodents that harbor diseases like Yersinia pestis. When these fleas bite infected rodents, they become carriers and can transmit the bacteria to humans or other animals after feeding again. This makes rodent fleas key players in moving plague from animal reservoirs into human populations, more so than fleas on pets or people themselves. While other fleas can spread different pathogens, the link between rodent fleas and plague transmission is the most established and widely recognized, which is why they are identified as an important disease vector.