Answer: D. direct contact with an infected person
Explanation:
Francisella is a gram-negative bacteria. They cause disease Francisella tularensis. It is a highly infectious agent. It can be spread by number of routes in humans. Like due to handling of the infected animals, ingestion of the contaminated food and water, inhalation of aerosols, bites by ticks and insects.
It does not spread from the infected person. The bacteria infects the skin, lymph nodes, eyes and lungs.
The symptoms include the skin ulcer, swollen and painful lymph glands, headache, chills, exhaustion and fever.
