Funnel-web spider bite
Definition
This article describes the effects of a bite from the funnel-web spider. Male funnel-web spiders are more poisonous than females.
Poisonous Ingredient
- Funnel-web spider venom
Where Found
Funnel-web spiders are found in southeast Australia, around Sydney. They are not native to the United States, although some people may keep them as exotic pets.
Symptoms
Funnel-web spider bites are extremely painful. They usually cause tingling or numbness in the mouth or lips within 10-15 minutes. These bites can be very dangerous and have been known to cause all of the following symptoms:
- Eyes, ears, nose, and throat
- Drooping eyelids
- Double vision
- Swallowing difficulty
- Heart and blood
- Collapse
- High blood pressure
- Rapid heart rate
- Lungs
- Difficulty breathing
- Muscles and joints
- Joint pain
- Severe muscle spasms -- usually in the legs and belly area
- Nervous system
- Chills
- Coma
- Headache
- Numbness of mouth and lips
- Skin
- Redness around the site of bite
- Sweating -- excessive
- Stomach and intestines
- Diarrhea
- Nausea
- Vomiting
Home Care
Funnel-web spider bites are extremely poisonous. Seek immediate medical attention. Call the Poison Control Center for guidance. Apply a bandage and firm pressure over the bite, and keep the affected area still, if possible, to prevent the venom from spreading.
Before Calling Emergency
Determine the following information:
- Patient's age, weight, and condition
- Time the bite occurred
- Type of spider, if possible
Poison Control
The National Poison Control Center (1-800-222-1222) can be called from anywhere in the United States. This national hotline number will let you talk to experts in poisoning. They will give you further instructions.
This is a free and confidential service. All local poison control centers in the United States use this national number. You should call if you have any questions about poisoning or poison prevention. It does NOT need to be an emergency. You can call for any reason, 24 hours a day, 7 days a week.
What to Expect at the Emergency Room
The health care provider will measure and monitor the patient's vital signs, including temperature, pulse, breathing rate, and blood pressure. Symptoms will be treated as appropriate.
The patient may receive antivenom, if available.
Outlook (Prognosis)
Funnel-web spider bites can be life threatening, especially in children, and must be treated quickly with antivenom by an experienced doctor.
References
Auerbach PS. Wilderness Medicine. 4th ed. St. Louis, Mo: Mosby; 2001.
Reviewed By: Stephen C. Acosta, MD, Department of Emergency Medicine, Portland VA Medical Center, Portland, OR. Review provided by VeriMed Healthcare Network.
