Some mosquitoes can transmit pathogens, but only females have the ability to do so, due to the fact that they feed on blood. The mosquito itself can become infected when it bites an infected Host An organism that can carry a Pathogen Micro-organism capable of causing disease. . In the context of mosquito ecology, for example a human or animal host, this term refers to the organism from which the mosquito seeks to feed. (animal or human) carrying the Pathogen Micro-organism capable of causing disease. in its blood. The Pathogen Micro-organism capable of causing disease. develops in the mosquito, which then transmits it when it bites a new Host An organism that can carry a Pathogen Micro-organism capable of causing disease. . In the context of mosquito ecology, for example a human or animal host, this term refers to the organism from which the mosquito seeks to feed. .

Diseases are divided into two groups: those for which the tiger mosquito is a major Vector Insect capable of transmitting a pathogen from one organism to another. and those for which other mosquitoes are the main vectors.