El Abuelito Cheese Listeria Outbreak 2021: 13 Ill, 1 Death

El Abuelito Cheese Listeria Outbreak (2021): Queso Fresco’s Deadly Pattern Repeats

If there is a single food most associated with listeriosis outbreaks in the United States, it is queso fresco — fresh, high-moisture, lightly salted Hispanic-style cheese, often made in small regional plants and sold through ethnic grocery channels that mainstream surveillance reaches late. In February 2021, El Abuelito Cheese Inc. of Union City, New Jersey, became the latest name on that list. Its queso fresco was linked to a Listeria monocytogenes outbreak that ultimately sickened 13 people, hospitalised 12, and killed one. The recall expanded twice as investigators learned how widely the contamination had spread within the company’s product line.

The product and the people affected

El Abuelito (“the little grandfather”) produced Hispanic-style fresh cheeses — queso fresco, quesillo, and requesón — distributed through retail stores in the Northeast and beyond, serving communities for whom these cheeses are dietary staples rather than occasional treats.

At a glance:

The outbreak disproportionately affected Hispanic communities — a pattern seen repeatedly in queso fresco outbreaks, where cultural dietary staples, language barriers in recall communication, and small-store distribution complicate public health response.

What happened

The outbreak came to light in February 2021, when the CDC identified a cluster of listeriosis cases with matching whole genome sequences. Patient interviews found that a striking proportion of the ill reported eating Hispanic-style fresh cheeses. Connecticut state laboratories isolated the outbreak strain of Listeria monocytogenes from a sample of El Abuelito queso fresco collected at retail — the product-level confirmation investigators needed.

On 19 February 2021, El Abuelito recalled its queso fresco products. But the story did not end there. As the FDA continued environmental sampling and product testing, the outbreak strain turned up in the company’s other fresh cheeses as well. The recall was expanded to include quesillo (Oaxaca-style string cheese) and requesón (a ricotta-like fresh cheese). Each expansion was an admission that the contamination was not a single bad batch but a facility-wide problem — Listeria resident in the plant environment, moving across product lines on equipment, hands, and aerosols.

The FDA’s investigation documented insanitary conditions and process failures at the Union City facility. Production was halted while the company undertook remediation. The final case count, when the CDC declared the outbreak over in May 2021, stood at 13 illnesses with 12 hospitalisations and one death — a hospitalisation rate above 90%, characteristic of invasive listeriosis, which strikes hardest at pregnant women, newborns, older adults, and the immunocompromised.

One detail from the investigation deserves emphasis for food safety professionals: fresh Hispanic-style cheeses are among the highest-risk products a small dairy can make. They are high in moisture, near-neutral in pH, lightly salted, and eaten without any cooking step by the consumer. There is no kill step after packaging, and Listeria grows happily at refrigeration temperatures through a shelf life measured in weeks. The margin for sanitation error is essentially zero.

Timeline

• Late 2020 – early 2021 — Illness onsets; CDC detects the WGS cluster.
• February 2021 — Connecticut isolates outbreak strain from retail El Abuelito queso fresco.
• 19 February 2021 — Initial recall of queso fresco products.
• February–March 2021 — Recall expanded to quesillo and requesón as contamination found across product lines; production halted.
• May 2021 — CDC declares outbreak over: 13 illnesses, 12 hospitalisations, 1 death.

Root cause

Investigators found Listeria monocytogenes established in the El Abuelito production environment, contaminating multiple fresh-cheese product lines. The root cause was a facility-level sanitation and process-control failure: the organism had colonised the plant and was being transferred to finished product, with no effective environmental monitoring or sanitation program capable of detecting and eliminating it. The product type — high-moisture, low-acid fresh cheese with no consumer kill step — meant that any plant contamination translated directly into consumer exposure, amplified by refrigerated storage during which Listeria multiplies.

Regulatory and business outcome

The FDA’s investigation led to a complete production shutdown while remediation was completed, and the company’s entire fresh-cheese portfolio was recalled. The case reinforced FDA’s enforcement posture toward small fresh-cheese manufacturers: repeated queso fresco outbreaks (including the 2024 Rizo-López incident) have made this product category one of the most closely watched in the dairy sector. For El Abuelito, the commercial damage — destroyed inventory, lost distribution, and a brand permanently associated with a fatal outbreak in its core community — was severe.

Lessons for food businesses

1. Fresh cheese is a zero-margin product. High moisture, near-neutral pH, no consumer cooking step: queso fresco and its relatives leave no room for sanitation lapses. Build your food safety plan around that reality.
2. One product positive means a facility investigation. El Abuelito’s recall had to expand twice because the contamination was environmental, not batch-limited. When you find Listeria in product, assume the plant is colonised until proven otherwise.
3. Serve your community’s language. Recall communications that do not reach the actual consumers — in their language, through their stores and media — fail at their only job. Multilingual, community-channel recall plans are essential for ethnic food brands.
4. Environmental monitoring is non-negotiable for ready-to-eat dairy. Seek-and-destroy swabbing programs, with corrective actions on every positive, are the industry standard. Their absence is now treated by FDA as evidence of insanitary conditions.
5. Small plants need the same controls as large ones. Artisan scale does not reduce pathogen risk; if anything, older equipment and tighter spaces increase it. Scale-appropriate does not mean standard-lite.
6. Expect the recall to grow. Plan financially and logistically for expansion: hold distribution records that let you trace every product, every lot, every customer within hours.
7. Study your category’s outbreak history. Queso fresco listeriosis outbreaks recur with grim regularity. If your product has a category history, regulators — and plaintiffs — will assume you knew the risk.

Sources

• “Outbreak Investigation of Listeria monocytogenes: El Abuelito Cheese (Final Update, May 14, 2021)” — U.S. Food and Drug Administration, 2021. https://outbreakdatabase-com.s3.amazonaws.com/2020-2021-Outbreak-Investigation-of-Listeria-monocytogenes-FDA-Final-Update-May-14-2021.pdf
• “CDC declares deadly Listeria outbreak over, with one death recorded” — Food Safety News, 2021. https://www.foodsafetynews.com/2021/05/cdc-declares-deadly-listeria-outbreak-over-with-one-death-recorded/