This bacterium infects multiple types of hosts including herbivorous mammals such as livestock and is considered zoonotic however humans are a dead end host and do not become infectious
Transmission / Exposure Route
Cutaneous: skin contact with spores from infected animals (95% of Cases; Most in Africa, Asia, and eastern Europe).
Gastrointestinal: eating poorly cooked meat/dairy from infected animal.
Inhalation: Inhalation of spores
Injectional: soft tissue infection associated with injection drug use 
Anthrax is not contagious and cannot be transmitted from person-to-person. 
Burden Of Disease
Duration of infectiousness and disease
Gastrointestinal: 10-14 days
Primary skin lesion 3-5 days after infection is painless puriritic papule.
Lesion forms a necrotic vesicle leaving a black eschar surrounded by edma.
Eschar dries and sloughs in next 1-2 weeks.
Oral-pharyngeal form: oral or esophageal ulcer with regional lymphadenopathy edema and sepsis
Lower GI form: primary intestinal lesions predominantly in terminal ileum or cecum. Nausea, vomiting, malaise, bloody diarrhea, acute abdomen, and sepsis are common symptoms of the Lower GI form.
- Flu-like symptoms including cough fever, fatigue that last from hours to a few days
- Rising fever, dyspnea, diaphoresis, shock. In advanced form, cyanosis and hypotension progress rapidly and death can occur within hours
Tissue swelling around the injection site
Excretion Rates (see Exposure)
Spores are cleared from the lung at a rate between 8-14% per day. 
Anthrax vaccination consists of 5 total intramuscular injections, followed by recommended annual boosters to maintain immunity. 
Cutaneous: 0-1 day. Other forms: 1-7 days, rarely up to 60 days (CDC)
Gram +, aerobic, encapsulated, nonmotile. Exists in a dormant spore or an actively replicating vegetative rod form Extremely hardy spores can persist for years, even decades.