Shigella bacteria are enterobacteriaceae family just like salmonella bacteria. It differs from salmonella bacteria only in terms of their immobility. Gram-negative, immobile, non-spore and facultative anaerobic bacteria are pathogenic for human health. Shigella dysenteriae, which causes dysentery in humans, is a shiga bacillus. This bacillus secretes exotoxin. These bacteria remain viable for long periods in humid and non-daylight environments, but are resistant to daylight, high temperatures and antiseptics. Shigella bacteria with food and drinks from the moment of entry into the body after the incubation period, abdominal nose, pain and bloody diarrhea appears. If shigella bacteria are detected with these findings, this disease is called bacillary dysentery.

Shigella bacteria are genetically close to escherichia bacteria. It shows an adequate growth in the media, although not as escherichia coli. Heat resistance is similar to escherichia coli. However, unlike salmonella bacteria and escherichia coli bacteria, animals are not the source of shigella bacteria. Only monkeys do this disease.

The viability of Shigella bacteria is variable. For example, these bacteria, which can maintain their viability in milk and dairy products until 170 day, can survive for a few hours as the pH value in the feces is low. It can survive longer at low temperatures.

Shigella bacteria are highly resistant to antibiotics. Therefore, the treatment of diseases caused by it becomes difficult. In general, diseases caused by shigella bacteria are transmitted from person to person and are not always foodborne. However, it is a fact that foodstuffs are carriers. Foods that contain Shigella bacteria are water, milk, fruits and vegetables. There is also a high risk of contamination in prepared foods, eggs and salads.

In advanced laboratories, studies are carried out to search for shigella among microbiological analyzes. These studies are based on standards published by national and international organizations. The standard considered in this respect is:

• TS EN ISO 21567 Microbiology of food and animal feed - Horizontal method for detection of Shigella spp