Researchers IPN Research and Advanced Research Center (Chivistav) they found bacteria of human feces exist cheese and cream handmade Sold three copies market of mexico citythe organization reported via a statement.
The scientific team analyzed the microbiological quality of artisanal cheeses and creams sold in the United States. market to measure existence fecal microbes or pathogens to verify their commercial and sanitary conditions.
“87.5% of samples of pasteurized fresh cheese sold as cut and 8% of unpasteurized ‘pasture cream’ sold in bulk had lower microbial quality, and Bacteria present in human or animal feces“explains Teresa Estrada García, researcher at the Department of Molecular Biomedicine at Cinvestav and author of the study.
The research was recently published in the journal international association for food protection, Assess the microbiological and marketing status of these foods based on Mexican Dairy Official Standard (NOM-210-SSA1-2014).
Additionally, he looked for bacteria such as:
- E. coli (Causes diarrhea and urinary tract infections)
- salmonella
- Listeria
- Staphylococcus aureus
they pose health risks
“It turns out that in this case Handling cheese in poor hygienic conditions In addition, they contain microorganisms and some pathogens found in human or animal feces, and consuming them may pose health risks,” Estrada Garcia said.
“Observations show how these initially pasteurized dairy products became contaminated during the distribution process. Additionally, they were observed remaining on public roads without refrigeration for over eight hours.”
Teresa Estrada García, Cinvestav researcher.
Unpasteurized “pasture cream” may also pose health risks, he added.
There are some cheeses on the market that exceed NOM limits
One sample of each selected cheese (panera, canasto, and double cream) and three “ranch cream” samples exceeded the limits set forth in the NOM Staphylococcus aureus.However, in no sample salmonella Neither Listeria.
The study also observed that microbial quality was low and the presence of Staphylococcus aureus Among the artisanal cheeses and creams sold in Mexico City markets, they present health risks because they are linked to contamination with human or animal feces during production or sale; the bacteria can even be released into food.reason consumer food poisoning.
Other bacteria present in the sample
Scientists found it in 43% of cheese samples and 29% of cream samples uropathogenic Escherichia coli (UPEC), a bacterium that causes a large number of urinary tract infections in Mexico, mainly in women.
“To date, few epidemiological studies have clearly shown whether consumption of foods containing UPEC strains causes urinary tract infections, as there is a lag between the time of ingestion of the product and the onset of clinical symptoms, making it difficult to determine whether Urinary tract infection is present. Identify the person responsible for the infection,” the study clarified.
Research on flea market cheese or “artisan” cream
They spent two years analyzing cheese sample and cream in release Three Flea Markets in Mexico Citywith the aim of studying its microbial quality, recording sales practices and hygienic conditions.
Ninety-six products were analyzed: 72 currently cut pasteurized fresh cheeses; 24 banana-type; 24 baskets; and 24 double cream; also including 24 unpasteurized “pasture cream.”
The inter-institutional scientific team that carried out the study consists of more than 10 researchers assigned to Cinvestav, the IPN National Institute of Biosciences and the Salvador Zubirán National Institute of Medical Sciences and Nutrition.