The young red panda that died unexpectedly at the Elmwood Park Zoo last month had a brain disease likely caused by a parasite.
A brain biopsy determined that Clinger, who was just a year and a half old, died of meningoencephalitis, the zoo said Friday.
The disease causes inflammation of the brain and Clinger, who died Nov. 29, was likely infected by a parasite.
His mother also died of encephalitis that was brought on by a parasite. Clinger and his brothers all received preventative treatment, but the zoo said the disease is hard to detect without a brain biopsy.
Clinger and his two brothers, Shredder and Slash, arrived at the Norristown zoo in June, a year after they were born at the Smithsonian Conservation Biology Institute.
An initial necropsy, or animal autopsy, didn't reveal a cause of death, prompting the zoo to send tissues for further testing.
Zoo officials said Slash and Shredder were receiving preventative treatment and being monitored.