Question

There are two routes of vector borne transmission. What are they, what are the differences, and which one is normally harder to combat or stop?

Answer 1

1. Mechanical vector transmission- In this case the vector takes up the pathogen from one diseased animal and transfer it to other.

In this, the pathogen doesn't multiply within the vector's body. Vector acts as a bridge to spread the disease

2. Biological vector transmission- In this case the vector takes up the pathogen from an infected animal and let that pathogen multiply and replicate inside it's own body and transfer that to another organism.

In this, the vector acts as a reservoir of pathogen where it multiplies and develop itself.

Obviously biological vector borne transmission is harder to combat because the rate of multiplication and spread of disease is much higher in this case than in mechanical method of transmission.