When-Titre

A coli titer is a microbiological measure that is used to determine the number of bacteria in a sample. It is measured in colony-forming units (CFU) per milliliter (ml) or per gram (g) of sample.

Coli titer is an important indicator for assessing the quality of food products, drinking water and other objects. It allows you to determine the degree of contamination of an object with bacteria and take measures to clean or treat it.

To determine coli titers, special microbiological methods are used, such as culturing on nutrient media and growing bacteria for a certain time. The results of the study can be expressed in the form of a graph or table indicating the number of bacteria in each sample.

Coli titers can be used to control the quality of food and beverage production and to assess the safety of drinking water. They help prevent the spread of bacteria and ensure safety for human health.

Coli-titer - (coli-, + French, titre definition) titer) Definition of microbiology

Coli-titer (Coli- + "French" titer, definition; synonyms: fecal coli titer, E. coli) is one of the most important indicators of sanitary water quality. It is an indicator of the concentration of bacteria per unit volume of the water under study according to the study of volumetric samples.

Counting coli bacteria is carried out by sequentially diluting the test solution in storage tanks with a growth indicator enriched with a nutrient medium, then counting bacterial colonies under illumination from 15 × 10-6 to 40 × 10 "6 lux and at room temperature (20 ± 2°) after 24, 48 and 72 hours Percentage

Coli titration is one of the methods for determining the number of E. coli cells in microorganisms in the external environment. This is an important procedure for assessing the quality of water and food products, as well as for studying microbiological contamination of the environment.

Coli titers are used when working with pure cultures in the laboratory. In this case, standardized test systems are used containing a reference culture of intestinal bacteria in which the number of units (or colony-forming units or cells) contained per unit volume is known. To carry out coli titers, enzymatic (for example, erythro- or lecithinase) or chemical (for example, benzidine) substrate systems are used. The end result of titration is the construction of a calibration graph of the dependence of the optical density of the indicator solution on the number of colonies of Escherichia coli formed under certain conditions.

To determine the amount of E. coli in food products, the McFay-Whale method (called