Toxin in undercooked meat linked to rare brain tumors By (0) A foodborne pathogen may be linked to a type of rare brain cancer in adults, a new study suggests. Researchers found that people who have glioma are more likely to have antibodies to toxoplasma gondii than a similar group that was cancer-free. Advertisement That indicates they were previously infected with the parasite, which is most commonly acquired from undercooked meat. The investigators examined the association between T. gondii antibodies measured several years before the cancer was diagnosed and the risk of developing a glioma. "This does not mean that T. gondii definitely causes glioma in all situations. Some people with glioma have no