Wonderful cheese is all in the culture

Jan 06, 2009

It's an age-old tradition that dates back at least 8,000 years but it seems we still have much to learn about the bacteria responsible for turning milk into cheese.

Now an international research team led by Newcastle University has identified a new line of bacteria they believe add flavour to some of the world's most exclusive cheeses.

The team used DNA fingerprinting techniques to identify eight previously undiscovered microbes on the French cheese Reblochon.

One of France's great mountain cheeses, Reblochon is a 'smear-ripened' cheese where the surface of the cheese is washed with a salt solution containing bacteria. This process helps to spread the bacteria across the surface of the cheese, ripening it from the outside in.

Other popular smear-ripened cheeses on the Christmas cheeseboard include Port de Salut, Livarot, Taleggio, Limburger and the Irish cheese Gubbeen.

The team have named the microbes Mycetocola reblochoni after the cheese they were first discovered in.

Project lead Professor Michael Goodfellow of Newcastle University said: "It has always been thought the bacteria cheese makers were putting in at the start of the process gave Reblochon its distinctive flavour.

"What our research actually showed was this new group of bacteria - the reblochoni -were responsible for the ripening process, influencing the taste, texture and smell of the cheese."

Reblochon - a soft, creamy, brie-like cheese - is made in the Savoy mountain region of France.

Using samples from three different farmhouses, the team carried out a series of modern molecular techniques to classify the bacteria.

Traditionally, smear-ripened cheeses such as Reblochon are exposed to a starter culture, a live mixture containing the microbe Brevibacterium linens, to ripen the cheese.

Now the research has shown that a new group of bacterial strains are involved in the later stage of ripening, out-competing the Brevibacterium and providing the flavour.

The reblochoni microbes are part of a large group of bacteria known as the Actinomycetes, many of which are already used in the production of antibiotics to treat diseases such as tuberculosis and diphtheria.

Professor Goodfellow says the next step will be to study the potential benefits of these new microbes.

"The next stage is to see how these new microbes might be used. Bacteria get a bad name because they are associated with causing disease but many are extremely beneficial and our reblochoni group may well prove to have important uses."

The research is published this month in the International Journal of Systematic and Evolutionary Biology.

Source: Newcastle University

Explore further: Microbes in Central Park soil: If they can make it there, they can make it anywhere

add to favorites email to friend print save as pdf

Related Stories

Scientists help food firms fight Listeria

Feb 06, 2013

East Midlands food businesses that make, distribute and sell chilled, ready-to-eat products are to be given help and advice to help them keep their products safe from a dangerous food-poisoning bacteria.

Recommended for you

Protected areas offer glimmers of hope for wildlife

1 hour ago

National parks and other protected areas offer hope for threatened species at a time of plunging wildlife numbers, conservationist group WWF said Tuesday, but their success has not been universal.

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

eldowan
not rated yet Jan 06, 2009
Come on Physorg, this was covered only 2 weeks ago.
http://www.physor...583.html

Does this *really* warrant a new article, considering That the bold description up top was cut to one sentance, and the other in the original appears as the first sentance in this *NEW* article?

This is really getting asinine.