Can you get Balamuthia Mandrillaris while gardening?

Theoretically, yes. Pratically no. Balamuthia infections are extremely rare, See the linked article from the American Centers for Disease Control. read more

Balamuthia mandrillarisis a free-living ameba (a single-celled living organism) found in the environment. It is one of the causes of granulomatous amebic encephalitis (GAE), a serious infection of the brain and spinal cord 1,2,5,6. read more

B. mandrillaris is found in the soil and water and was first discovered in 1986 in the brain of a baboon that died in the San Diego Wild Animal Park. B. mandrillaris can infect the body through skin wounds or by inhaling the dust containing Balamuthia. Balamuthia has been isolated in nature. read more