Final answer:
Acanthamoeba infection, particularly Acanthamoeba keratitis of the eye, is most commonly caused by swimming in a lake while wearing contact lenses. This allows the amoeba to get trapped between the eye and the contact lens, potentially leading to infection.
Step-by-step explanation:
The question is related to the causes of Acanthamoeba infection. Acanthamoeba is a genus of protozoan amoebae that is present in soil and unchlorinated bodies of fresh water, including lakes. This protozoan can infect humans through various routes; however, the most common infection is Acanthamoeba keratitis, an infection of the eye. One of the primary causes of this eye infection is swimming in a lake while wearing contact lenses or the improper disinfection of contact lenses.Therefore, the correct answer to the question is: a) swimming in a lake while wearing contact lenses. This activity could provide a way for the Acanthamoeba cysts to get trapped between the lens and the cornea, leading to an infection.
Ensuring contact lenses are properly disinfected and not worn while swimming can help prevent such infections.The most likely cause of an Acanthamoeba infection is contaminated water. Acanthamoeba is a genus of free-living protozoan amoebae that are common in unchlorinated bodies of fresh water. It can enter the body through various routes, including swimming in contaminated water, and can cause infections of the eyes, skin, and nervous system. It is important to properly disinfect contact lenses and avoid swimming or using a hot tub while wearing them to prevent Acanthamoeba keratitis.