Most spiders are absolutely harmless to humans. In fact, of the 20,000 different species of spiders that inhabit the Americas, only 60 are capable of biting humans. Within that small group, only four are known to be dangerous to humans: the brown recluse, the black widow, the hobo or aggressive house spider, and the yellow sac spider. Within this select group, only the brown recluse and the black widow spider have ever been associated with significant disease and very rare reports of death.
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First Aid & Emergencies Related Resources
First Aid & Emergencies Articles
- Does Thrombolysis Work for Stroke?
- Chigger Bites
- Black Widow Spider Bite
- Brown Recluse Spider Bites
- Black Widow and Brown Recluse Spider Bite
- Is There a Substitute for Human Blood?
- What Is a Normal GCS Score?
- Broken Toe
- Heat Stroke
- Coral Cuts
- Suture Care
- Chondromalacia Patella (Patellofemoral Syndrome)
First Aid & Emergencies Medications
First Aid & Emergencies Images and Slideshows
- First Aid Quiz: Care for Wounds, Scrapes, Cuts, and Burns
- First Aid: Wound Care for Cuts and Scrapes
- First Aid: Bandaging Injuries and Wounds From Head to Toe
- Common Causes of Foot Pain
- Broken Bones: Types, Symptoms, and Treatment
- First Aid & Emergencies: When to Call 911
- Picture of Hammertoes
- Picture of Compartment Syndrome
- Picture of Finger Anatomy
- Picture of Fungal Nail Infection
- Sports Injuries: Types, Treatments, and Prevention
- Muscle Cramps (Charley Horse) and Muscle Spasm Remedies
- 8 First Aid Kit Essentials for Scrapes, Cuts, Bug Bites, and More in Pictures
- Spider Bites: Black Widow vs. Brown Recluse First Aid
- Picture of Foot
First Aid & Emergencies Quizzes
First Aid & Emergencies News
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- What Are Home Remedies to Treat a Sprained Ankle?
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- Paralyzed Man's Hand Movement Partially Restored
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- Drug Shortages Continue to Rise
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- Head Injury Risks Linger
- Bunions, High-Arched Feet Often Inherited
- New CPR Guidelines: Chest Compressions First