Anthrax is a word that often appears in news headlines or medical dramas, but what does it actually mean for your health? This guide breaks down anthrax in straightforward language—what it is, how it spreads, what symptoms to watch for, and how to protect yourself and your loved ones.

At Crestwood General, we believe that clear, accurate health information empowers people to make better decisions. Here is everything you need to know about anthrax, explained simply.

What Is Anthrax?

Anthrax is a serious infectious disease caused by bacteria called Bacillus anthracis. These bacteria exist naturally in soil around the world and most commonly affect livestock and wild animals such as cattle, sheep, goats, antelope, and deer.

People usually become infected through contact with anthrax spores found in infected animals or contaminated animal products like wool, hides, or hair. Spores are dormant, tough forms of the bacteria that can survive in the environment for many years.

Infection can occur in three main ways:
- Through a cut or scrape on the skin
- By breathing in spores
- By eating food or drinking water contaminated with spores

Anthrax is rare in the United States. However, occasional outbreaks do occur in grazing animals. In areas where anthrax has appeared before, veterinarians often recommend yearly vaccination of livestock as a preventive measure. Learn more about animal health and anthrax from the USDA Animal and Plant Health Inspection Service.

How Anthrax Affects the Body: The Five Types

The form of anthrax a person develops depends on how the spores enter the body. All types can cause severe illness or death if not treated promptly with appropriate antibiotics.

Cutaneous Anthrax (Skin)

This is the most common form of anthrax and also the least deadly when treated. It occurs when spores enter through a cut or scrape while handling infected animals or contaminated animal products.

Cutaneous anthrax typically appears on the head, neck, forearms, or hands. Early signs include a group of small, itchy bumps or blisters. These develop into a painless sore with a characteristic black center, often surrounded by significant swelling.

Inhalation Anthrax (Lungs)

Inhalation anthrax is the most serious form of the disease. It happens when a person breathes in anthrax spores, which can occur in workplaces like wool mills, slaughterhouses, or tanneries where contaminated animal products are processed.

The infection begins in the lymph nodes in the chest before spreading throughout the body. Early symptoms may resemble the flu, which can make early diagnosis challenging. Prompt medical attention is critical.

Gastrointestinal Anthrax (Digestive System)

This rare form occurs when a person eats raw or undercooked meat from an infected animal. Gastrointestinal anthrax has seldom been reported in the United States.

The infection can affect the throat, esophagus, stomach, and intestines, leading to a wide range of symptoms. Because it is uncommon, healthcare providers may not immediately suspect anthrax, which underscores the importance of sharing your full history, including recent food consumption and travel.

Injection Anthrax

Injection anthrax has been identified in people who inject drugs in parts of northern Europe but has not been reported in the United States. This form causes infection deep under the skin or in the muscle at the injection site and shares similarities with cutaneous anthrax.

Welder's Anthrax

Welder's anthrax is a newly recognized, rare condition found in welders and metalworkers. While similar to traditional anthrax, it is caused by a slightly different bacterium and can lead to severe pneumonia.

If you work with metal and experience fever, chills, sudden cough, chest pain, difficulty breathing, or coughing up blood, seek medical care immediately and mention your occupation. Early recognition and treatment are essential. More information on occupational health risks is available from NIOSH, the National Institute for Occupational Safety and Health.

Recognizing the Symptoms

Symptoms of anthrax can appear anywhere from one day to more than two months after exposure. Without proper treatment, any form of anthrax can spread through the body and lead to severe illness or death.

Symptoms of Cutaneous Anthrax

A cluster of small, itchy bumps or blisters
A painless sore, often on the face, neck, arms, or hands, that develops a black center
Noticeable swelling around the sore
For injection anthrax: deep sores or abscesses under the skin or muscle at the injection site

Symptoms of Inhalation Anthrax

Fever and chills
Heavy sweating
Chest pain, cough, or shortness of breath
Confusion or dizziness
Nausea, vomiting, or stomach pain
Headache or body aches
Extreme fatigue

Symptoms of Gastrointestinal Anthrax

Fever and chills
Swelling of the neck or neck glands
Sore throat, hoarseness, or pain when swallowing
Nausea and vomiting, sometimes with blood
Diarrhea or bloody diarrhea
Headache
Redness of the face and eyes
Stomach pain and swelling
Fainting

Who Is at Higher Risk?

Most people will never encounter anthrax. However, certain jobs, hobbies, or activities can increase the chance of exposure.

Higher-risk groups include:
- Farmers, ranchers, and veterinarians who work with livestock
- Workers who handle animal hides, wool, hair, or bone products, including artisans and drum makers
- Laboratory professionals who analyze animal samples or work with anthrax bacteria
- Travelers to regions where anthrax is more common in animal populations
- Emergency responders in the rare event of a deliberate release

If your work or activities place you at higher risk, discuss preventive options with your healthcare provider or occupational health specialist. This may include the anthrax vaccine as a pre-exposure precaution.

Prevention: Your Best Defense

Preventing anthrax focuses on reducing exposure and acting quickly if exposure occurs.

Before Exposure: Pre-Exposure Prophylaxis

For people in high-risk occupations, the anthrax vaccine may be recommended before any exposure happens. This is called pre-exposure prophylaxis.

The vaccine is approved for adults ages 18 to 65 and involves a series of five shots over 18 months, followed by yearly boosters. It is recommended for:
- Certain laboratory workers who handle anthrax
- Some members of the U.S. military
- People whose jobs involve handling animals or animal products in areas where anthrax occurs

The vaccine is not recommended for people who are pregnant, have had a serious allergic reaction to the anthrax vaccine, or have severe allergies to any vaccine component. If your employer recommends the vaccine due to your job duties, ask about on-site availability or referrals to local clinics. You can also contact your state health department for guidance.

After Exposure: Post-Exposure Prophylaxis

If you think you have been exposed to anthrax, contact a healthcare provider immediately. Prompt action can prevent illness from developing.

Post-exposure prevention may include:
- Antibiotics: Medications like doxycycline or ciprofloxacin can stop anthrax bacteria from growing if started soon after exposure. These are typically taken twice daily for up to 60 days.
- Anthrax vaccine: In some cases, the vaccine may be given after exposure as part of a combined prevention strategy.

During a public health emergency, officials will provide clear instructions on who should receive medication or vaccine, where to access it, and how long to continue treatment. It is essential to complete the full course of antibiotics even if you feel well.

Learn more about emergency antibiotic use from the CDC and vaccine information from the U.S. Food and Drug Administration.

What to Do If You Suspect Exposure

Do not wait for symptoms to appear. If you believe you may have been exposed to anthrax:
1. Contact a healthcare provider right away
2. Explain how, when, and where you think exposure occurred
3. Follow medical advice regarding testing, antibiotics, or vaccine
4. Avoid handling potentially contaminated materials until professionals advise it is safe

Early treatment with appropriate antibiotics is highly effective at preventing severe illness.

Trusted Resources for More Information

The Bottom Line

Anthrax is uncommon but serious. Understanding how it spreads, recognizing potential symptoms, and knowing how to respond can make a significant difference in outcomes. Whether you work in a higher-risk field, pursue hobbies involving animal products, or simply want to be prepared, knowledge is your strongest tool.

Stay informed, take practical precautions, and consult trusted health professionals when you have concerns. For more clear, practical health guidance on anthrax, workplace safety, and everyday wellness, visit Crestwood General. Your health matters, and being prepared is always worthwhile.