Health Alert: Brain Parasite Detected in San Diego County

Media
10 hours ago
2 min read

A potentially dangerous parasite known as rat lungworm has been detected in wildlife in San Diego County, raising concerns among researchers and public health officials.

The parasite, scientifically known as Angiostrongylus cantonensis, was recently identified in local animals including rats and opossums, according to researchers studying wildlife in the region. The discovery marks the first confirmed evidence of the parasite becoming established in California.

Health experts say the parasite primarily infects rats but spreads through a cycle involving snails and slugs, which can carry the microscopic larvae. Humans and other animals can become infected if they accidentally ingest contaminated snails, slugs, or produce that has been exposed to their slime.

In rare cases, the parasite can travel to the brain and cause eosinophilic meningitis, a type of inflammation of the brain and spinal cord. Symptoms may include severe headaches, stiff neck, nausea, tingling sensations in the skin, and in extreme cases neurological complications.

Researchers discovered the parasite after investigating neurological illness in several animals, including wildlife found across San Diego County. Tests later confirmed the presence of the parasite in multiple species, indicating the organism may now be circulating locally.

Health officials stress that the risk to the general public remains low, but they are urging residents to take precautions. Experts recommend thoroughly washing fruits and vegetables, avoiding consumption of raw snails or slugs, and ensuring food is properly cleaned before eating.

While no human cases have been reported locally so far, researchers say the discovery highlights the need for increased monitoring as the parasite expands into new regions.

Officials say further surveillance will determine whether the parasite’s presence in San Diego County represents an isolated introduction or a growing environmental health concern.