Press-out-type leak-proof visual hand-held grid counting surface sampling culture dish

Abstract

The invention discloses a press-out-type leak-proof visual hand-held grid counting surface sampling culture dish which comprises a dish bottom and a dish cover. The dish bottom is provided with a second clasp and a first clasp which are in a stable chimeric structure. The chimeric structure can be loosened when a force is applied, so that a movable dish bottom side wall moves relative to a first dish bottom side wall. A second dish bottom side wall can prevent a culture medium from overflowing out of the dish bottom. Through cooperation of a first grasping handle and a second grasping handle,the dish bottom and the dish cover can be more convenient to open or close. An observation window facilitates the observation of minute colonies, and grid lines simplify the counting process of bacterial colonies.

Description

technical field [0001] The invention relates to an experimental equipment, in particular to a pressure-out leak-proof visible hand-held grid counting surface sampling culture dish. Background technique [0002] Petri dish is one of the most widely used experimental equipment in biology. It is often used for the culture test of microorganisms on the surface of food packaging materials, tableware, etc., and the sampling of microorganisms on the surface of the object is usually wiped with a sterile cotton swab on the surface of the object to be tested, or Use sterile filter paper to stick to the surface of the object to be tested, and then transfer the cotton swab or filter paper to the buffer solution for eluting to achieve the purpose of sampling. However, cotton swabs or filter paper cannot completely release the collected microorganisms, which may easily cause incomplete cultivation of cultivable microorganisms; in addition, the sampling of microorganisms on the surface of ...

AI Technical Summary

Problems solved by technology

However, cotton swabs or filter paper cannot completely release the collected microorganisms, which may easily cause incomplete cultivation of cultivable microorganisms; in addition, the sampling of microorganisms on the surface of objects requires aseptic operation, while cotton swabs or filter paper are used in the collection and elution of microorganisms. During the process, it is easy to be polluted by environmental microorganisms, and it is difficult to meet the requirements of aseptic operation; these shortcomings will cause the deviation of the microbial test results on the surface of the object

In addition, the operation process of the above method is cumbersome and inefficient, which easily causes waste of human resources

When the colony of the target culture grown on the medium in the petri dish is small, it is necessary to enlarge the colony with a microscope to observe the accurate shape of the colony, and the petri dish needs to be opened during the magnification and observation of the colony, which may cause pollution or spillage of harmful cultures

When the number of colonies of the target culture grown in the culture medium in the petri dish is huge, the counting process of the colonies is more cumbersome

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