You have been exposed to a powder that may be from anthrax. Anthrax is an infectious disease caused by anthrax bacteria. The bacteria make spores that live naturally in the soil. The spores stay inactive for years. They become active when they find a host. This is often wild animals or domestic livestock. You can pick up the bacteria after handling infected animals or animal products. If you breathe in the spores, the bacteria can enter your lungs. This is called inhalation anthrax. Anthrax can also cause an infection in the skin, stomach, and intestines (GI tract).
Inhalation anthrax is the most serious form of anthrax exposure. But this form can't be spread from person to person. And not everyone who has been exposed to the spores will get sick. If an infection occurs, symptoms often begin in 1 to 7 days. Symptoms may appear as late as 2 months after exposure.