Which organisms are the most common vectors for pest-borne diseases?

Mosquitoes, ticks, and rodents are considered the most common vectors for pest-borne diseases due to their significant roles in transmitting various pathogens to humans and animals. Mosquitoes are infamous for spreading diseases such as malaria, dengue fever, and Zika virus, making them one of the leading vectors in the world. Ticks are known for transmitting Lyme disease and Rocky Mountain spotted fever, both of which are serious health concerns. Rodents, particularly mice and rats, can carry diseases like hantavirus and leptospirosis, both of which can be transmitted directly to humans through contact with urine, droppings, or bites.

The choice of other options does not reflect the same level of significance in disease transmission. While ants and cockroaches may contaminate surfaces or food leading to foodborne illnesses, they do not serve as active vectors for systemic diseases like mosquitoes or ticks. Bees and butterflies primarily focus on pollination and do not pose risks for transmitting diseases to humans. Flies can carry pathogens and spread illness, but they are not as efficient or common as mosquitoes or ticks in terms of vector potential. Therefore, understanding the roles of these organisms highlights why mosquitoes, ticks, and rodents are classified as the most dangerous and common vectors for pest