Case 4 You've Got Mail In 2001, letters containing anthrax in endospore form were mailed to several news media offices and 2 U.S. Senators. The building had to be evacuated because the airflow system became contaminated. Twenty-two people were infected and five people died. Of the 22 cases, 11 people suffered from inhalation anthrax and experienced the following: fatigue, non-productive cough, fever, chills, and sweats. Bacillus anthracis is a Gram positive bacterium that causes anthrax. Bacillus anthracis is an endospore former. Which of the following best describes its cellular structure. nucleus, chitin cell wall, forms buds nucleoid, chitin cell wall wall, with hyphae 3 layers of calicum, keratin and peptidoglycan around dense nucleoid region consists of plasma membrane, nucleus, and bud scars .