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How do mosquitoes and ticks transmit vector-borne diseases?
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human disease
The routine monitoring of blood pressure levels is an important part of assessing an individual's health. Blood pressure provides information about the amount of blood in circulation and about heart function and thus is an important indicator of disease.
Mosquitoes and ticks transmit infectious diseases through vector-borne transmission, acting as biological or mechanical intermediaries that pass pathogens between hosts.1
Mechanisms of Transmission
- Biological Transmission: In this process, the pathogen undergoes development or change within the vector before it is transmitted to a new host. For example, when a tick feeds on an infected host, the causative agent of Lyme disease may undergo changes in protein expression within the vector.1
- Feeding Behavior: Female mosquitoes ingest blood to support egg maturation, using specialized mouthparts to pierce the skin. During this process, they inject saliva containing anticoagulants to facilitate feeding. If the mosquito has previously ingested blood from an infected host, it can pass pathogens to the next host through its saliva.2
- Tick Attachment: Unlike mosquitoes, which feed quickly, ticks often remain attached for days or weeks. Their saliva contains compounds that modulate the host's immune response and blood coagulation, allowing them to feed undetected while potentially transmitting pathogens like those causing tularemia or ehrlichiosis.3
These vectors are responsible for spreading serious illnesses, including malaria, dengue, and Zika fever.245