ORLANDO, Fla. -- The parents of a Central Florida 11-year-old who died after a rare microscopic parasite entered his body at a lake lashed out at the health department Friday for its decision not to issue stronger alerts of the potential dangers in bodies of water.

Will Sellars, 11, died this week at Arnold Palmer Hospital from amoebic encephalitis, or acute swelling of the brain.

The amoeba suspected of infecting Will likely entered his body through the nose and traveled to the brain and spinal cord.

Friday, Will's parents said they were outraged that freshwater bodies of water still won't have signs even after his death.

"(Will) was a special person, and we are tired of misconceptions and the Health Department being so arrogant and saying that they don't need to alert the community," parent Mandi Sellars said. "Yes they do."

"I wish they would put signs up to post this and let parents know that this is nothing to play around with," father Steven Sellars said. "It is a horrible thing to go through."

The Orange County Health Department said Friday that it understands the Sellars family's anger and is considering doing more than posting annual warnings on its Web site concerning the risk amoeba risk.

"Now, because we don't want this to happen to anyone else and because of the concern, we have been talking with the county to try and possibly look at putting up some other warning signs," Orange County Health Department representative Dain Weister said.

Most Florida health departments follow the advice of the federal Centers for Disease Control and Prevention which doesn't recommend posting signs because they would be required on every body of water in the state.

However, the city of Winter Park has posted signs warning of primary amoebic meningoencephalitis in lakes.

The health department said it has heard from only a couple of people complaining of the lack of signs at lakes.

But officials said they will work on notifying people how widespread the amoeba problem is.

How many signs and how much they will cost have not been determined, Local 6 reported.

Symptoms of amoebic encephalitis include headache, fever, nausea, vomiting, stiff neck, confusion and loss of balance. Seizures and hallucinations are also common with the infection.

The infection, which is rare, cannot be spread from person to person.

A celebration of life ceremony for Will will be held Saturday at Blessed Trinity Catholic Church in the Conway area of Orlando.

The service will be at 10 a.m.

Watch Local 6 News for more on this story.