Raccoon Roundworm Eggs Found in San Fernando Valley Dog, First Official Case Reported

A domestic dog in California’s San Fernando Valley has tested positive for eggs of the raccoon roundworm (Baylisascaris procyonis) during a routine veterinary examination.

According to the Los Angeles County Department of Public Health, this marks the first formally reported detection of B. procyonis eggs in a dog in Los Angeles County. Officials note that infections may have occurred previously but gone undetected or unreported.

The dog is currently undergoing treatment, and no additional infected pets or related human illnesses have been identified.

Public health officials emphasize that the risk to people remains extremely low. Raccoon roundworm eggs are not immediately infectious; they must remain in the environment for two to four weeks before becoming capable of causing infection. Regular yard cleanup, good hand hygiene, and routine veterinary care significantly reduce any potential risk.

In September 2024, Los Angeles County health officials reported two human cases of raccoon roundworm infection in the South Bay area.

Baylisascaris procyonis is a parasite commonly associated with raccoons, and awareness—rather than alarm—is key to prevention.

A domestic dog in California’s San Fernando Valley has tested positive for eggs of the raccoon roundworm (Baylisascaris procyonis) during a routine veterinary examination.

According to the Los Angeles County Department of Public Health, this marks the first formally reported detection of B. procyonis eggs in a dog in Los Angeles County. Officials note that infections may have occurred previously but gone undetected or unreported.

The dog is currently undergoing treatment, and no additional infected pets or related human illnesses have been identified.

Public health officials emphasize that the risk to people remains extremely low. Raccoon roundworm eggs are not immediately infectious; they must remain in the environment for two to four weeks before becoming capable of causing infection. Regular yard cleanup, good hand hygiene, and routine veterinary care significantly reduce any potential risk.

In September 2024, Los Angeles County health officials reported two human cases of raccoon roundworm infection in the South Bay area.

Baylisascaris procyonis is a parasite commonly associated with raccoons, and awareness—rather than alarm—is key to prevention.

Read more here: http://publichealth.lacounty.gov/phcommon/public/media/mediapubhpdetail.cfm?prid=5228

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