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Microbial contamination found in orange juice squeezed in bars and restaurants
Date:12/14/2011

Scientists from the University of Valencia in Spain have analysed fresh orange juice squeezed by machines in catering establishments. They have confirmed that 43% of samples exceeded the acceptable enterobacteriaceae levels laid down by legislation. The researchers recommend that oranges are handled correctly, that juicers are washed properly and that the orange juice is served immediately rather than being stored in metal jugs.

Around 40% of the fresh orange juice consumed in Spain is squeezed in bars and restaurants. According to a study conducted by researchers at the University of Valencia (UV) though, poor handling of the oranges and insufficient cleaning of the juicer equipment stimulates bacterial contamination.

The team collected 190 batches of squeezed orange juice from different catering locations and analysed their microbiological content on the same day. The results reveal that 43% of the samples exceeded the enterobacteriaceae levels deemed acceptable by food regulations in Spain and Europe. Furthermore, 12% of samples exceeded mesophilic aerobic microorganism levels.

According to the data published in the Food Control Journal, the presence of Staphylococcus aureus and the Salmonella species was found in 1% and 0.5% of samples respectively.

Isabel Sospedra, one of the authors of the study warns that "generally a percentage of oranges juice is consumed immediately after squeezing but, as in many cases, it is kept unprotected in stainless steel jugs."

In fact, the scientists have found that some juices that were kept in metal jugs presented "unacceptable" levels of enterobacteriaceae in 81% of cases and in 13% of cases with regards to mesophilic aerobic bacteria. However, when the freshly squeezed juice is served in a glass, these percentages fall to 22% and 2% respectively.

As the researcher adds, "it must also be borne in mind that juicers and juicing machines have a la
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Contact: SINC
info@agenciasinc.es
34-914-251-820
FECYT - Spanish Foundation for Science and Technology
Source:Eurekalert  

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