Apparently, swimming in the pond can lead to the protozoan infected water getting into your nose.

FORBES: How Not to Die Using a Neti Pot

Case in point: Children in Louisiana die from this protozoan all the time when they go swimming in fresh water ponds.

FORBES: How Not to Die Using a Neti Pot

When the second adult died, the tap water had tested positive for this protozoan and a Neti Pot was found on the premises.

FORBES: How Not to Die Using a Neti Pot

Or take Toxoplasma, a protozoan that needs to move between cats and their prey and back again in order to complete its life cycle.

FORBES: Those Resourceful Bugs

Professor Tony Hart, from the University of Liverpool, said it was surprising, but welcome that the drug was effective against rotavirus, as it had been initially developed to tackle another type of organism, a protozoan.

BBC: Virus is devastating in the developing world