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What microorganisms grow in solid media?

Bacterial cultures.


What process is best for the short-term storage of bacterial cultures?

The best process for short-term storage of bacterial cultures is to store them in a refrigerator at 4°C on an agar plate or in a sterile broth. Storing cultures in this manner will help maintain their viability for a few weeks. Alternatively, bacterial cultures can also be stored in glycerol stocks at -80°C for longer-term storage.


What is the technique you used in purify the bacterial culture on a plate?

I used streak plate technique to purify the bacterial culture on a plate. This involved streaking the culture onto the agar surface in a specific pattern to isolate individual colonies by dilution. Subsequent incubation allowed the colonies to grow separately, enabling the selection of pure cultures for further study.


What is the differences between a streak plate technique and a serial dilution technique?

A streak plate technique is used to isolate individual bacterial colonies on a solid agar plate to obtain pure cultures, while a serial dilution technique is used to dilute a bacterial sample in a series of steps to obtain a range of concentrations for further analysis. Streak plate technique is qualitative, focusing on colony isolation, while serial dilution technique is quantitative, focusing on estimating bacterial concentration.


When can you get results for bacterial skin cultures?

Results for bacterial cultures are usually available in one to three days. Cultures for fungi and viruses may take longer-up to three weeks. Cultures are covered by insurance.


Does the number of bacteria recorded by the standard plate count method accurately reflect the total bacterial count from the sample?

No. The standard plate count method is an indirect measurement of cell density of only viable bacterial cells. Optical density counting measure entire bacterial sample, the living as well as the dead bacterial cells.


Does cottage cheese have bacterial cultures in it?

Yes


What is the function of a hockey stick in microbiology?

In microbiology, a hockey stick is a tool used for streaking bacterial cultures on agar plates to isolate individual colonies. By dragging the stick across the plate, the bacteria are spread out in a way that allows for distinct colonies to grow. This helps microbiologists study and identify different strains of bacteria.


What is a streak plate?

A streak plate is a surface of unglazed ceramic, used to find the true color of a mineral specimen by drawing the specimen across it. The color of the resultant powder is referred to as the streak or streak color of a mineral.


Could some bacteria grow on the streak plate and not be seen using the pour plate technique?

Put simply - yes. Some strictly aerobic organisms will not grow in a pour plate. They may, however proliferate on a streak plate. Also consider the posibility of experimental error. The culture may have been added to the molten agar when it was too hot for the organisms to survive.


Which separation method is not good for cultures containing a great deal of bacterial growth?

Filtration is not a suitable separation method for cultures with high bacterial growth because the bacteria can clog the filter pores and inhibit proper separation. This can lead to inefficient filtration and potential blockages that may damage the equipment. Instead, centrifugation or sedimentation methods are more effective for separating high bacterial loads.


What is the primary use of slants of deeps of broths?

The primary use of slants and deeps in broth culture media is for the maintenance and storage of bacterial cultures. Slants provide a larger surface area for growth, while deeps provide a more anaerobic environment. Both are used for long-term storage and preservation of bacterial cultures.