A small dairy in southern Maryland has been quietly sickening people since 2023, and most of them had no idea where the danger was hiding — until now.
Story Snapshot
- Clover Hill Dairy of Mechanicsville, Maryland has recalled all of its cheese products after being linked to a deadly Listeria outbreak spanning three states.
- Nine people have gotten sick, eight were hospitalized, and one person died — with illness cases dating back to March 2023.
- Six product samples tested positive for Listeria, and genetic testing confirmed the strain matched the one found in sick patients.
- The cheese was sold under at least five different brand names, making it hard for consumers to know what they bought.
A Cheese Recall That Started Small and Grew Into Something Bigger
On June 3, 2026, Clover Hill Dairy issued its first recall. It covered only the soft ricotta and requesón cheese — a fresh, mild, ricotta-style product popular in Latin American cooking. That seemed like a contained problem. Then investigators kept digging.
By June 14, the Maryland Department of Health expanded the warning to every single cheese the dairy makes, including cheddar, Monterey Jack, pepper jack, and more. The facility had already lost its operating license two weeks earlier.
The U.S. Food and Drug Administration (FDA) and the Centers for Disease Control and Prevention (CDC) confirmed the outbreak spans Maryland, New York, and Virginia.
Samples from sick patients were collected as far back as March 6, 2023, meaning this bacterium was circulating for over three years before a full recall was triggered. That timeline should concern anyone who bought soft cheese from this region and felt mysteriously ill at some point in recent years.
The Science That Sealed the Case Against Clover Hill Dairy
Health investigators did not rely on guesswork. They used whole-genome sequencing — a method that reads the complete genetic code of a bacterial sample and compares it to others.
The Maryland Department of Health confirmed that genetic testing identified nine people infected with the exact same Listeria strain. [2]
Separately, the FDA confirmed that six requesón cheese product samples tested positive for Listeria monocytogenes and matched the outbreak strain. [4] An unopened, sealed 18-pound bucket of Clover Hill requesón also tested positive, removing any doubt about the source.
Traceback work followed the cheese from sick patients in New York back through a retailer, then to a distributor, and finally to the Clover Hill Dairy facility in Mechanicsville.
That chain of evidence — patient samples, product samples, genetic matching, and distribution records — is about as solid as a foodborne illness case gets.
The company cooperated with investigators, stopped production, and issued a public apology, which reflects well on them. But the facts still point directly to their facility as the source of a bacteria that has now killed one person and hospitalized eight others.
Why the Relabeling Problem Makes This Worse
Here is the part that should make you check your refrigerator right now. Clover Hill Dairy sold its cheese wholesale to distributors, who then repackaged it under completely different brand names. [2]
The Maryland Department of Health confirmed the cheese may appear under the labels KESSO, QUESOS LA RICURA, IZALCO, DE MI PUEBLO, and RIO LINDO.
If you bought soft cheese at a farmers’ market, a small grocery, or a Latin food store in Maryland, Virginia, New York, New Jersey, North Carolina, or Washington, D.C., you may have this product without knowing it. One clue: look for plant or permit number 24-128 on the label.
Listeria is not a bacteria you want to gamble with. It can cause severe illness, miscarriage, stillbirth, and death. Symptoms can show up anywhere from a few days to 70 days after eating contaminated food, which makes it notoriously hard to trace.
Older adults, pregnant women, young children, and anyone with a weakened immune system face the highest risk. If you have any Clover Hill Dairy product — or any cheese under those five brand names — do not eat it. Throw it away or return it for a full refund.
What This Outbreak Reveals About Soft Cheese Safety
Fresh soft cheeses like requesón, ricotta, and cuajada carry a higher risk of Listeria than hard, aged cheeses. Even pasteurized milk can produce contaminated cheese if bacteria enter the product after heating — through equipment, surfaces, or handling. [2] This is not a new problem in the food industry.
What is notable here is how long this particular strain circulated before investigators connected the dots. The death linked to this outbreak happened in 2023. The recall did not come until 2026. That three-year gap is a serious question that food safety regulators will need to answer.
Clover Hill Dairy stated it sincerely apologizes for the hardship caused and hopes to correct the problem as soon as safely possible. [6] That is a reasonable statement for a company in crisis mode.
But an apology does not change the outcome for the family that lost someone in 2023, or for the eight other people who ended up hospitalized. The FDA investigation remains ongoing, and additional products could still be implicated. Keep watching this one — it may not be over yet.
Sources:
[2] Web – Deadly Clover Hill Dairy Requesón Listeria Outbreak [Update]
[4] Web – Clover Hill Dairy Ricotta Cheese Linked to Listeria Outbreak
[6] X – Health officials suspended Clover Hill Dairy’s license on May 30 …
