what are insects for
Insects can act as mechanical vectors, meaning that the insect can carry an organism but the insect is not essential to the organismâs life cycle, such as when house flies carry organisms on the outside of their bodies that cause diarrhea in people.nsects. Triatomine bugs are the vectors for Chagas disease. An insect that transmits a disease is known as a vector, and the disease is referred to as a vector-borne disease.