"Alien" Parasite Removed from Womans Brain
Worm Removed From Woman's Brain
Woman Recuperating After Doctors Remove Parasite
An Arizona woman says she's feeling good, a little more than a week after undergoing six hours of surgery to remove a worm that had lodged in her brain.
Dawn Becerra and her doctors believe the parasite got into her system three years ago, when she ate a pork taco while on a visit to Mexico.
Becerra said she was ill for three weeks after eating the taco. Soon after, she began suffering violent seizures. Later, doctors determined she had a parasitic worm in her brain and it had caused neurocysticercosis ó a lesion in her brain.
Poor Sanitation Allows Parasite to Spread
Doctors at Arizona's Mayo Clinic in Scottsdale believe the taco contained Taenia solium, a parasite that is common in Latin America. It can be transmitted by infected food prepared by someone who has not followed proper sanitation procedures after coming into contact with the creature's eggs, which can be present in human feces.
Some experts point out that it is difficult to know for certain that the taco was the source of the worm.
However Becerra ingested the parasite, it attached itself as an egg to her intestinal wall. Eventually, the egg developed into the worm, which moved into her blood stream and to her brain, said Dr. Joseph Sirven, who operated on Becerra.
Once in the brain, the worm causes little harm until it eventually dies and decays, thereby inflaming surrounding tissue.
"It's after the worm dies that the body reacts to something foreign," Sirven explained.
Undergoing Brain Surgery While Awake
Although Becerra seems to have kept a good attitude ó she even gave the worm a nickname, Tonya ó she said the seizures it caused were devastating. She reached a point where she could no longer tolerate them.
"You have to be conscious that you can have them at any time," Becerra told ABCNEWS' Good Morning America on Thursday, "and I lived with the thought that there was a worm in my brain."
She made the decision to have it removed and just when she thought the situation couldn't get any worse ó it did.
Doctors told her that she would have to undergo brain surgery while she was completely conscious because the procedure would take them into an extremely sensitive area of the brain.
ĎShe Was Very Luckyí
Beccera underwent the six-hour procedure last week ó awake the entire time. She received only acupuncture and a mild anesthesia to deal with the pain.
Doctors spoke to the bilingual Becerra in both Spanish and English during the operation.
Eventually, they found the decayed worm and removed it ó without doing any long-term damage to their patient.
"She was very lucky because she had only one cyst," said Sirven.
"She should be in good shape now."
Becerra is recovering quickly, and doctors say she won't need a checkup for six months.
But it has still been a bizarre and difficult ordeal for her.
"The fascinating part about this is that it's much more common than people think," notes Sirven. And through good sanitation and cooking pork thoroughly, he says, "it's very, very preventable."
The World Health Organization says neurocysticercosis is a common cause of epilepsy in Africa, Asia and Latin America.
Mind-Controlling Parasites Date Back Millions of Years
Researchers find schizophrenia linked to parasite carried by cats
Do Parasites Rule the World? (2000)
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