Cheese ripening the cheese by fungi to occur. Mould-ripened cheeses ripen faster than hard cheeses, in weeks as opposed to the typical months or even years. This is because the fungi used are more biochemically active than the starter bacteria. Where the ripening occurs is largely dependent on the type of cheese: some cheeses are surface-ripened by moulds, such as Camembert and Brie; and some are ripened internally, such as Stilton. Surface ripening of some cheeses, such as Saint-Nectaire cheese, may also be influenced by yeasts which contribute flavour and coat texture. Others are allowed by the cheesemaker to develop bacterial surface
Egyptian cheese or close to it; there was an old dry cheese; and there was a medium one in between." The first would have been unripened cheese made locally from sour milk, which may or may not have been salted. The old dry cheeses would have often been imported, and were cheeses ripened by rennet enzymes or bacteria. The nature of the "medium" cheese is less certain, and may have referred to preserved fresh cheeses, evaporated milk or cheese similar to Indian paneer, where the addition of vegetable juices makes the milk coagulate. Medieval Egyptian cheese mostly used buffalo or cows' milk,