Others include Axfood, Coop and ICA, which have recalled some meat products in Sweden, and Aldi, which has pulled some products from shelves in Britain.
CNN: Battle over blame after horse meat found in beef products
The Food Standards Agency says that some infected meat may have entered the food chain.
Some scientists have argued that consuming meat or at the least insects was a good part of the diet of heterodontosaurs.
The seven French supermarket chains that have already withdrawn some of their frozen meat-based meals, including lasagne, from the shelves are Auchan, Casino, Carrefour, Cora, Monoprix, Grand Jury and Picard.
But they may help explain the underlying risk of eating red meat, which some researchers have long thought was higher than the saturated fat and cholesterol content alone could explain.
Although opinion polls have shown general support for whaling among Icelanders, some shun the meat because of the giant creatures' still-limited numbers.
Many studies have linked consumption of red and processed meat to cardiovascular disease and some cancers.
He said some economy burgers would have "a number of species" of meat present in them.
Some have only shown traces, which may be the result of meat processing plants not properly cleaning equipment.
Many studies over the years have linked consumption of red and processed meat to cardiovascular disease and some cancers.
Eating contaminated meat or some other animal products from cattle that have BSE is thought to be the cause of Creutzfeldt-Jakob disease.
Eating contaminated meat or some other animal products from cattle that have bovine spongiform encephalopathy is thought to be the cause of the fatal brain disease in humans that is called variant Creutzfeldt-Jakob disease.
Meat prices have doubled in the past three months, and some families living in even wealthier neighborhoods of the capital say they have started selling televisions and refrigerators so that they can afford to feed their families.
Some of the suspect meat was also exported to Germany, France and Spain, where authorities have been alerted.
BBC: Horsemeat scandal: Dutch uncover large-scale meat fraud
And I think that makes complete sense as a response to some of the artists that we have shown, who, you know, make huge installation projects full of meat - that then rots.
Some researchers long have thought that the added risk of death was higher than the saturated fat and cholesterol in red meat could explain.
In fact, the first few days I sort of felt cheated, or maybe even a little bit hungry, because I wasn't able to eat meat, but I found that this is mostly psychological, that as long as you have protein in some form, whether it's beans or tofu, and you get used to it, it's really - you don't feel like you're missing much at all.
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