Los Angeles County West Vector & Vector-Borne Disease Control District

 

Other Mosquito-Borne Diseases

 

 

 

Diseases locally transmitted Diseases with the potential to be locally transmitted

West nile virus (WNV)

St. Louis Encephalitis (SLE)

Western Equine Encephalomyelitis (WEE)

Canine Heartworm Disease

Zika virus

Dengue Fever

Chikungunya

Yellow Fever

Malaria

 

 

St. Louis Encephalitis (SLE)

What is SLE?

A viral disease caused by a virus spread by infected Culex mosquitoes.

Endemic to California, though relatively rare.

The last important California outbreak occurred in 1989.

 

Informational Links

Centers for Disease Control and Prevention SLE Information

Symptoms

Many persons infected will have no apparent illness. 

 

Severe infection: Fever, headache, neck stiffness, stupor, disorientation, coma, tremors, occasional convulsions (especially in infants) and spastic (but rarely flaccid) paralysis

Western Equine Encephalomyelitis (WEE)

What is WEE?

A viral disease spread by infected Culex mosquitoes

Mainly affects horses and infrequently humans.

Symptoms

Many persons infected will have no apparent illness.

 

Severe infection: Fever, headache, neck stiffness, stupor, disorientation, coma, tremors, occasional convulsions and paralysis.  

Canine Heartworm

What is Canine Heartworm?

An infection in animals caused by a worm, Dirofilaria immitis, which is spread by mosquito bites. Dogs, cats, ferrets, wolves, coyotes, seals, and sea lions can all become infected.

 

Informational Links

County of Los Angeles Public Health - Veterinary Public Health Heartworm Information

Symptoms (in animals)

Tiredness, problems breathing, coughing, and heart failure.

 

Infected cats may breathe hard and be more likely to vomit.

 

Infection can be present for a while in the pet before symptoms appear.

Dengue

What is Dengue?

A viral infection transmitted to people by the bite of an infected Aedes mosquito.

It is estimated that there are over 100 million cases of dengue worldwide each year

 

Informational Links

Centers for Disease Control and Prevention Dengue Information

 

California Department of Public Health Dengue Information

 

County of Los Angeles Public Health Dengue Information

Symptoms:

High fever, severe headache, severe pain behind the eyes, joint pain, muscle and bone pain, rash, and mild bleeding (e.g., nose or gums bleed, easy bruising).

 

Severe infection: Internal bleeding, shock and death

Yellow Fever

What is Yellow Fever?

A viral infection transmitted to people by the bite of an infected Aedes mosquito.

 It occurs in tropical and subtropical areas in South America and Africa. Yellow fever virus is a very rare cause of illness in U.S. travelers to these areas.

 

Informational Links

Centers for Disease Control and Prevention Yellow Fever Information 

Symptoms

Fever, chills, severe headache, back pain, general body aches, nausea and vomiting, fatigue, and weakness.

 

Severe infection: High fever, jaundice, internal bleeding (especially from the gastrointestinal tract), shock, failure of many organs, and death

Chikungunya

What is Chikungunya?

A viral infection transmitted to people by the bite of an infected Aedes mosquito. Outbreaks have occurred in parts of Africa, Europe, Southeast Asia, and islands in the Indian and Pacific Oceans, Florida, Puerto Rico, and the U.S. Virgin Islands.

 

Informational Links

Centers for Disease Control and Prevention Chikungunya Information

 

California Department of Public Health Chikungunya Information

Symptoms

Fever, severe joint pain, headache, muscle pain, or rash  

Malaria

What is Malaria?

A serious and sometimes fatal disease transmitted by Anopheles mosquitoes.

Locally-transmitted malaria is now rare in California.

Today over 99 percent of the malaria cases diagnosed in U.S. residents are acquired during travel to other countries.

 

Informational Links

Centers for Disease Control and Prevention Malaria Information 

 

California Department of Public Health Malaria Information

 

County of Los Angeles Public Health Malaria Information

 

Symptoms

Fever and flu-like illness: Chills, headache, muscle aches, and tiredness

 

Nausea, vomiting, and diarrhea

 

Severe infections may cause kidney failure, seizures, mental confusion, coma, and death

 
 

What should I do if I think a family member or pet might have a mosquito-borne disease?

Consult a healthcare provider for proper diagnosis.

 

 

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