Physicians in the UK were unable to explain a strange ring-like pattern moving across a patient's brain tissue in a series of scans taken over four years. During a biopsy, they were shocked to learn it was a one centimeter-long parasitic tape worm.
Toxoplasma gondii is a brain parasite that makes mice lose their instinctive fear of cats and may lead to schizophrenia in humans. Scientists think that the parasite works by inflaming the brain or by creating cysts. But it now appears that Toxoplasma is doing something far more insidious — and permanent — to the…
Without mosquitoes, malaria wouldn't be able to infect humans. But in addition to hitching a ride, it now appears that the parasite also alters insect behavior — making infected mosquitoes thirstier for human blood. Like, a lot thirstier.