Recently, traces of the measles virus were discovered in wastewater samples taken from a treatment facility in Marion County, as reported by state health officials on Friday.
The virus was found during routine wastewater sampling conducted on October 6. This suggests that there was at least one individual in the area who had measles, according to the Oregon Health Authority.
However, a single positive sample doesn’t necessarily indicate an ongoing risk to the community. It’s possible that someone with the virus was just passing through, officials clarified.
Dr. Howard Chiou, who serves as the medical director for communicable diseases and immunizations, compared wastewater surveillance to a radar alert. He explained that it can detect low levels of a virus circulating in the community or indicate the beginning of a potential outbreak.
This early detection is crucial, Chiou noted, as it allows health care providers to prepare and encourages patients to ensure their measles vaccinations are current.
While a majority of Oregonians have been vaccinated, the virus can pose a significant risk to those who haven’t, particularly for pregnant individuals, infants under one year, and people with compromised immune systems.
Measles is a respiratory illness that spreads through the air when an infected person sneezes or coughs. It can remain airborne for up to two hours after the infected person has left the vicinity. It’s extremely contagious — nine out of ten unvaccinated individuals near someone with measles may contract the virus, as indicated by the Centers for Disease Control and Prevention.
Typically, measles begins with symptoms like fever, cough, runny nose, and watery eyes, followed by a distinctive red rash that usually starts on the face and spreads downward.
Furthermore, the disease can result in serious complications, such as pneumonia, brain swelling, and, in rare cases, death. This year, three measles-related fatalities have been confirmed in the U.S., according to the CDC.
Oregon health officials have reported only one measles case this year, involving an unvaccinated adult from Multnomah County who tested positive in June after returning from abroad. Last year, the state had 31 confirmed cases.
Nationwide, the CDC has confirmed 1,573 measles cases this year, which is more than four times the amount reported in 2022.
Most of these cases are tied to outbreaks — defined as three or more linked infections — with nearly 90% of those infected either being unvaccinated or unaware of their vaccination status. Currently, there have been 44 measles outbreaks across 41 states this year, according to the latest CDC data.
