If you do open one or more of them, you can contaminate them with microbes. These will most likely not be the ones you are trying to culture. It can give you a false negative.
If you do open one or more of them, you can contaminate them with microbes. These will most likely not be the ones you are trying to culture. It can give you a false negative.
Unopened agar plates are typically referred to as "sterile agar plates."
Sterile is clean and clean is sterile, so both
One is guaranteed to have no microorganisms on it inside the sterile packaging, the other is clean but is not guaranteed to have no microorganisms on it.
As soon as you open a dry sterile container it is not sterile any more due to stuff falling on it. Studies do show that the longer a sterile field is exposed the higher rate of contamination. There is less contamination with a covered field. Jim RN
Makeup concealer is not produced or marketed as a sterile compound. As such, there is a distinct possibility of infecting an open wound by rubbing a non-sterile cream into it. Especially with facial wounds, but actually with all wounds, until they heal, you should minimize exposure to non-sterile adulterants.
If the bandage comes in contact with an open wound, then yes it should. If a bandage is securing a sterile dressing that completely covers the wound, then as the sterile field is already intact, simple prophylacsis will do.
If it is left open on the bench it can be contaminated by bacteria in tyhe air, e.g. micrococci. If the loop was not flamed adequately before innoculation this can also cause contamination. and also if the medium used was not sterile in the first place the plate will be contaminated.
Sterile dressings are free from microorganisms, making them suitable for covering wounds to prevent infection. Non-sterile dressings may have some microorganisms present and are typically used for minor injuries or to provide cushioning. Sterile dressings are essential for sterile procedures and when dealing with open wounds to reduce the risk of infection.
If they are kept sterile, then they should last until you use them.they should last until you use them.
You want sterile dressing for open wounds. If you put a dirty dressing on an open wound, you are increasing the likelihood for infections and diseases. But if all that you have is a ripped t-shirt to put on a wound, that is definitely better than nothing at all.
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