West Nile VirusWest Nile Virus is a mosquito-borne virus that was first discovered in Africa. It first appeared in the United States in 1999 and it moved west until it reached California in 2003. It is present throughout the year, although illness is often associated with peaks during hot summer months.
Saint Louis EncephalitisSaint Louis Encephalitis is a virus, related to West Nile virus, transmitted by the bite of an infected mosquito. Culex tarsalis and to a lesser extent Culex pipiens are the mosquito species responsible for transmitting St. Louis Encephalitis.
Western Equine EncephalitisWestern Equine Encephalitis is a virus transmitted through the bite of an infected mosquito. The transmission cycle is between wild birds and mosquitoes. A mosquito will bite a bird infected with Western Equine Encephalitis and become infected. While looking for another blood meal, an infected mosquito can infect an uninfected bird, horse, or human. In past outbreaks, this disease has caused…
Dog HeartwormDog heartworm is a disease caused by a roundworm (Dirofilaria immitis) which lives in the heart and lungs of dogs. Heartworm disease has become a serious health problem for dogs throughout the United States. The disease is transmitted into the bloodstream of dogs, coyotes, foxes and even cats through the infective bite of a western treehole mosquito (Aedes sierrensis). These microscopic larvae…
Dengue FeverDengue is a virus transmitted by the bite of an infected mosquito. It has been found in many parts of the world, including recently the Caribbean, South and Central America, and North America.
ChikungunyaChikungunya is a virus transmitted by the bite of an infected mosquito. It has been found in many parts of the world, including recently the Caribbean, South and Central America, and North America.
Yellow FeverYellow fever is a virus transmitted by the bite of an infected mosquito. It has been found in areas of South America and Africa.
MalariaMalaria is a parasite that is transmitted to humans through the bite of an infected mosquito. There are four species of malaria parasites: Plasmodium falciparum, P. vivax, P. ovale, and P. malariae. These four species differ in their biology and in severity of disease.
