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How People Are Infected

animated gif showing anthrax spores entering lungs and infecting an illustrated person

People get infected with anthrax when spores get into the body. When this happens, the spores can be activated and become anthrax bacteria. Then the bacteria can multiply, spread out in the body, produce toxins (poisons), and cause severe illness. This can happen when people breathe in spores, eat food or drink water that is contaminated with spores, or get spores in a cut or scrape in the skin.

Anthrax is NOT Contagious

You cannot catch anthrax from another person the way you might catch a cold or the flu. In rare cases, person-to-person transmission has been reported with cutaneous anthrax, where discharges from skin lesions might be infectious.

Certain activities (described below) can increase a person’s chances of getting infected.

sheep bearing sheared for it's wool

Working with infected animals or animal products

Most people who get sick from anthrax are exposed while working with infected animals or animal products such as wool, hides, or hair.

Inhalation anthrax can occur when a person inhales spores that are in the air (aerosolized) during the industrial processing of contaminated materials, such as wool, hides, or hair.

Cutaneous anthrax can occur when workers who handle contaminated animal products get spores in a cut or scrape on their skin.

brown cow with anthrax with tags on its ears

Eating raw or undercooked meat from infected animals

People who eat raw or undercooked meat from infected animals may get sick with gastrointestinal anthrax. This usually occurs in countries where livestock are not routinely vaccinated against anthrax and food animals are not inspected prior to slaughter.
In the United States, gastrointestinal anthrax has rarely been reported. This is because yearly vaccination of livestock is recommended in areas of the United States where animals have had anthrax in the past, and because of the examination of all food animals, which ensures that they are healthy at the time of slaughter.

Injecting heroin

A newly discovered type of anthrax is injection anthrax. This type of anthrax has been seen in northern Europe in people injecting heroin. So far, no cases of injection anthrax have been reported in the United States.

 

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