Culex is a genus of mosquito. It has been known to carry pathogens for West Nile virus, avian malaria, encephalitis, and other diseases.
Culex modestus was created in 1889.
Culex quinquefasciatus was created in 1823.
Culex jenseni was created in 1910.
Culex rajah was created in 1986.
Culex tritaeniorhynchus was created in 1901.
Culex pipiens was created in 1758.
There are many organisms that cause disease. Bacteria, like H. Pylori that causes stomach ulcers. Of course, rats can cause diseases and they are still organisms, just not single celled. They carry ticks, and their feces isn't good to breath in. Ticks carry diseases, and rats can carry sickness which can spread to humans.
Mosquito
Yes you can be infected with a pathogen but not show any signs or symptoms but you can still pass it on it other people.
Anthony Arthur Barrett has written: 'The poetry of the Culex' -- subject(s): Culex
culex mosquito spread malaria in sparrow but anopheles mosquito spread malaria in human beings.
Culex Pipiens