Consumers are being urged to check their bathroom shelves after Oribe voluntarily recalled its Serene Scalp Densifying Shampoo due to bacterial contamination, according to the Food and Drug Administration (FDA).
The recalled shampoo was found to be contaminated with Pluralibacter gergoviae, an opportunistic bacterium notorious for its ability to survive in environments that would otherwise kill other microbes.
"Though Pluralibacter gergoviae bacteria pose little medical risk to healthy people, those with certain health issues, such as weakened immune systems may be more susceptible to infection by the bacteria," the FDA said.
The FDA also urged people to stop using the products regardless of their health status.
The recall is currently limited to specific lots of the Oribe Serene Scalp Densifying Shampoo in 8.5 oz and 33.8 oz sizes, while further investigation is still ongoing. The affected products are:
- Oribe Serene Scalp Densifying Shampoo (in 8.5 oz and 33.8 oz sizes), manufactured between February 21, 2026 and February 26, 2026
- The affected lot codes for the 8.5 oz size (UPC 840035231242) can be found on the bottom of the bottle printed in black and begin with the prefix "YR": o YR010556
- The affected lot codes for the 33.8 oz size (UPC 840035231273) can be found on the bottom of the bottle, printed in black and begin with the prefix "YR": o YR010566 o YR010576
What Is Pluralibacter gergoviae?
Pluralibacter gergoviae belongs to the Enterobacteriaceae family, a group of bacteria commonly found in the environment. Although it is not considered a common cause of illness in healthy individuals, it is classified as an opportunistic pathogen because it can cause infections under certain conditions.
The bacterium has been associated with urinary tract infections, bloodstream infections, wound infections, and respiratory illnesses, particularly among hospitalized patients or people with compromised immune systems.
Unlike more familiar bacteria such as Escherichia coli or Salmonella, P. gergoviae has gained attention primarily because of its unusual ability to contaminate cosmetic products.
According to the FDA, cosmetics manufactured with contaminated water or produced under inadequate sanitary conditions may harbor harmful microorganisms capable of causing infections, especially when applied to the eyes, broken skin, or the scalp.
Why It Keeps Showing Up in Cosmetics
One reason P. gergoviae remains a recurring problem is its remarkable resistance to many preservatives commonly used in cosmetics.
Water-based products such as shampoos, conditioners, lotions, liquid soaps, and facial cleansers provide an environment where bacteria can multiply if contamination occurs during manufacturing or packaging.
Unlike many microorganisms that are quickly eliminated by preservative systems, P. gergoviae has demonstrated the ability to adapt to chemical preservatives used in personal care products, allowing it to survive and, in some cases, proliferate.
A recent review published in the journal Applied and Environmental Microbiology found that P. gergoviae employs multiple mechanisms to withstand preservative stress, including changes in its outer membrane and activation of efflux pumps that remove toxic compounds from bacterial cells. Researchers say these adaptations make the organism particularly challenging for cosmetic manufacturers to control.
What Are the Health Risks?
For most healthy people, accidental exposure to P. gergoviae through contaminated cosmetics is unlikely to result in serious illness.
However, experts say the bacterium can become problematic when it enters the body through cuts, abrasions, surgical wounds or the eyes. People with weakened immune systems including older adults, cancer patients undergoing treatment, transplant recipients and individuals with chronic illnesses may face a higher risk of infection.
Potential symptoms depend on where exposure occurs and may include skin irritation, redness, localized infection or, in rare cases, more severe systemic illness.
The FDA advises consumers to stop using recalled cosmetic products immediately and follow the manufacturer's instructions for returning or disposing of them.
Why Cosmetic Contamination Happens
Cosmetic manufacturers invest heavily in quality control, but contamination can still occur at multiple stages of production.
Water is one of the most common sources because it serves as a primary ingredient in many personal care formulations. If manufacturing equipment, storage tanks, filling lines or raw ingredients become contaminated, bacteria may enter the finished product.
Although preservatives are added to inhibit microbial growth, no preservative system is completely foolproof. Some bacteria, including P. gergoviae, have evolved strategies that allow them to tolerate concentrations that would normally eliminate competing microorganisms.
What Consumers Should Do
Consumers should periodically check whether cosmetic products they use have been recalled, particularly if they notice unusual odors, discoloration, separation or changes in texture that may indicate microbial contamination.
Anyone using a recalled product should discontinue use immediately, even if the product appears normal.
Individuals who develop persistent scalp irritation, skin infections or eye symptoms after using a recalled cosmetic should seek medical evaluation, especially if symptoms worsen or fail to improve.
While cosmetic recalls involving bacterial contamination remain relatively uncommon compared with the millions of personal care products sold each year, experts say they underscore the need for stringent manufacturing practices and routine microbial testing.
