#4
Mon, 12 Jul 2004 - 06:52
What is rabies?
Rabies is a disease caused by a virus that can affect the nervous system (brain and spinal cord) of any kind of mammal, including humans.
Animals that are infected with rabies can spread the disease through their saliva or brain matter. People may be exposed to rabies when bitten by an infected wild or domestic animal. People in the United States rarely get rabies because of widespread animal vaccination programs; rabies is more common in developing nations.
What are the symptoms of rabies?
Signs of rabies in animals may include having excessive saliva or sometimes foaming at the mouth, paralysis, or behavioral changes in your pet (shyness when the pet was friendly) or no fear of humans in a wild animal.
Rabies infection in humans begins with vague symptoms such as fever, cough, or sore throat followed in several days by more serious and rapidly progressing symptoms such as restlessness, hallucinations, and seizures. The final stage is coma and death.
Can rabies be treated?
Once rabies symptoms appear, the disease progresses rapidly, and there is no cure. If medical treatment to prevent rabies is provided before symptoms develop, the virus almost always is eliminated before it can cause serious damage. Medical treatment to prevent rabies includes:
Thorough cleansing of the area of exposure (bite, scratch, or open sore).
Vaccinations.
Any animal bite or area of exposure should be washed with soap and water immediately. Visit a health professional to see if additional care is needed. Your doctor and local health department can help determine your risk of exposure to rabies. Rabies vaccinations will be administered promptly if the risk of exposure to the virus is high.
How is rabies spread?
In the United States, the rabies virus is found almost exclusively in wildlife. Bats, raccoons, skunks, foxes, and coyotes are the most common hosts of rabies. The animals most likely to be affected can vary by region, although bats are becoming a primary source of infection among humans in many areas of the U.S.1 Report all animal bites, especially those from wildlife, to your local health department, and they can tell you which species pose a threat for rabies in your area. This will help determine the need for preventive treatment.
Occasionally, the rabies virus can spread to pets, such as dogs, cats, and domestic ferrets. However, household pets rarely get rabies, due to successful vaccination programs. A pet that always stays indoors is extremely unlikely to be exposed to the virus.
In extremely rare situations, a person can get rabies without being bitten by a rabid animal. Humans have acquired rabies without being bitten (nonbite exposure) by:
Exposure to rabid animal saliva or brain matter that comes in contact with open wounds, scratches, or mucous membranes, such as an eye or open mouth.
Breathing airborne virus, which may occur very rarely in places where the virus exists in high quantities, such as a cave filled with bats.
Human-to-human transmission through surgery. There have been rare cases where a person developed rabies after receiving a transplanted cornea from a donor who was unknowingly infected with rabies.
Your risk for developing rabies depends on how you were bitten. If the bite went directly into your skin, your risk is higher than if you were bitten through your clothing. A bite on your face puts you at higher risk than if you were bitten on the arms or legs. Your risk also increases if you were bitten more than once.
In what countries does rabies occur?
Rabies occurs in all areas throughout the United States except Hawaii. Only 42 people died from rabies in the United States between 1980 and 2000, and 13 of these people contracted rabies while in other countries.2 However, rabies is more common in developing nations such as those of the Indian subcontinent, Southeast Asia, Africa, and Latin America, where it is transmitted to humans primarily through dog bites.3
Rabies occurs in most regions of the world, except Antarctica and some island nations, such as Japan and England.1