What is the role of bacteria in making yogurt?

Article by: Ana Flórez Tercero | Last update: April 10, 2022
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Yogurt is a fermented milk that is obtained from the action of different bacteria (streptococcus thermophilus and Lactobacillus bulgaricus) that transform part of the lactose into lactic acid and an increase in consistency is produced by coagulation of its proteins.

What role do bacteria play in the cheese and yogurt production process?

These bacteria enrich the aroma and diversity of dairy products by acting, among other compounds, on casein, a protein present in milk, and above all, on lactose, which is ultimately responsible for the production of cheese acids. .

What bacteria are involved in making yogurt?

Yogurt production is based on the addition of ferments from Streptococcus salivarius subsp thermophilus and Lactobacillus delbrueckii subsp bulgaricus to milk.

What are the 4 types of bacteria?

Types of bacteria: bacilli

    Short bacilli with irregular shape (coccobacilli). Long bacilli with wavy ends (genus Bacillus). Curved bacilli with the shape of a comma (genus Vibrio). Bacilli grouped in filaments forming Chinese letters (genus Corynebacterium).

What role do the bacteria in milk play?

Due to several of their metabolic properties, lactic acid bacteria play an important role in the food industry, due to their significant contribution to the taste, smell, texture, sensory characteristics, therapeutic properties and nutritional value of food products.

23 related questions found

What are the bacteria present in milk?

Raw milk can contain dangerous bacteria such as Salmonella, E. coli, Campylobacter, Staphylococcus aureus, Yersinia, Brucella, Coxiella, and Listeria.

What do lactic acid bacteria do in milk?

The action of these bacteria triggers a microbial process by which lactose (milk sugar) is transformed into lactic acid. As the acid accumulates, the structure of the milk proteins changes (they curdle), and so does the texture of the product.

What are actinomycetes?

The word actinomycete derives from the Latin aktino which means “sun”, “ray” or “in radiated arrangement”, and which refers to structures “with filaments”, and mycete, “fungus”.

How many and what are the types of bacteria?

Shapes: All bacteria can be classified into one of three basic shapes: spheres (cocci), rods (bacilli), and spirals or helices (spirochetes). Need for oxygen: Bacteria are also classified into two groups, depending on whether they need oxygen to live and grow or not.

What are the most common types of bacteria?

Next, we explain some of them in more detail:

    Escherichia coli and Salmonella. … Helicobacter pylori. … Neisseria gonorrhoeae. … Staphylococcus aureus. … Streptococcus. … Pseudomonas.

What are bacteria and their types?

Bacteria are prokaryotic microorganisms that are a few micrometers in size (usually between 0.5 and 5 μm in length) and have a variety of shapes, including spheres (cocci), rods (bacilli), curved filaments (vibrios), and helical ( spirilla and spirochetes).

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