Cheese-There are several varieties of cheese manufactured all over  the world. All types of cheese are the byproducts of lactic fermentation of milk. There are several varieties of cheese which are classified as hard, semi-hard and soft cheese. These are prepared with culturing of the milk either with bacterial or mould species. Among the several varieties,  the popular ones are  cheddar  cheese and  Swiss  cheese which are known as  'hard cheese' whereas  Roquefort cheese  (blue cheese) is a semi-soft cheese and

the soft  variety  is the  camembert cheese.  The  cheddar cheese originated  from England and was adopted  in USA, the color of which ranges from white to orange- yellow,  depending upon the color added. The curing is done with the help of Streptococcus  and  Lactobacillus. The cheese is without  the  gas holes (the eyes), which characterizes the Swiss cheese. The Swiss cheese  is  cultured with the help of  a  mixed culture,  L.  bulgaricus,  Streptococcus  thermophilus  and Propionibacterium  shermanii which imparts the characteristic eye formation. The roquefort cheese  is prepared  by  the inoculation  of curd with Penicillium roqueforti and the  camembert  cheese  is produced  by  the fermentation  with  Penicillium camemberti.