If there is condensed water in the Petri dish, will it be contaminated by bacteria?

Petri dishes with condensed water will not be polluted after sterilization.

Under normal circumstances, water droplets will be produced after condensation, and there will be no bacterial pollution after sterilization. If water droplets pollute the culture medium, it may be the mixed bacteria brought in accidentally during operation, or the culture medium is not completely sterilized, resulting in bacterial pollution.

After the culture medium in the culture dish is solidified (soon, almost solidified after sub-packaging), turn the culture dish upside down to prevent the condensed water on the dish cover from polluting the culture medium (at this time, if the dish cover is facing down, the water vapor evaporated from the culture medium will go up or condense on the culture medium, so that there will be no water drops on the dish cover and then drop, thus preventing pollution).

Basic information

Petri dish is a kind of laboratory vessel used for microorganism or cell culture, which consists of a flat disc-shaped bottom and a cover, usually made of glass or plastic. Petri dish materials are basically divided into two categories, mainly plastic and glass. Glass can be used for plant materials, microbial culture and animal cells, and can also be used for monolayer culture.

Plastic may be made of polyethylene and can be used once or more. It is suitable for laboratory inoculation, labeling and bacterial separation, and can be used for the cultivation of plant materials.