How to transfer a bacterial colony from a petri dish to a slide?
My science fair project I have to be able to look at bacteria under a microscope. How can I transfer a bacterial colony which I have grown on petri dish, to a slide for my microscope?
Answer 1:
Assuming you don't have a sterile loop laying around your house, you can take a paperclip and straighten it out, and stick the end of it in the burner of your stove (if you have gas) to sterilize it. Be careful you don't burn yourself! Now, let the paperclip cool down so you don't vaporize your bacteria, but don't wait too long or your paperclip won't be sterile anymore. Use the paperclip to transfer your bacteria to your glass slide where you have placed a drop of water. Move the paperclip back and forth so they mix up in the water. You are going to need some kind of stain to visualize the bacteria so I would recommend that you ask a biology teacher if they have any you can borrow. Be careful with it because it will stain a lot of stuff.Good luck!
Answer 2:
Pick the colony with a sterile loop and suspend it in a drop of saline on the slide by vigorous agitation within the bounds of the drop. (Use a biological safety cabinet for potential pathogens.) Fix and stain the slide normally.What kind of bacterial infecton will cause blisters in the back of your throat?
A 5 year old has been prescribed Amoxicillin and said the dr checked her throat ears and made her pee in a cup. It can't be a viral infection because amoxicillin doesn't treat viral infections. What all types of bacterial infections are there?
Answer 1:
She could have tonsilitis, strep- or many parents are given amox. as it's a low dose antibiotic and makes parents feel like the MD accomplished something. (Many don't and aren't pro antibiotics)Perhaps tonsilitis
Strep
How long is bacterial conjunctivitus contagious for after start of treatment?
I have a bacterial conjunctivitus, and i started treatment, and i was wondering how long it is contagious for.
Answer 1:
It can last up to 48 hours depending on the length of time it infects. If it has been more than two weeks before treatment you need to be careful not to infect others for at least 48 hours.Answer 2:
24 hours after antibiotics are started.How to Bacterial intoxications differ from Bacterial infections of the digestive system?
Bacterial intoxications differ from bacterial infections of the digestive system in that intoxications :
a. are accompanied by fever
b. are more severe
c. are transmitted via water
d. are treated with antibiotics
e. have a shorter incubation time
Answer 1:
E. The toxin acts immediately.Scientists develop antibiotics to fight bacterial diseases. Which one correctly summarizes how antibiotic work?
Scientists develop antibiotics to fight bacterial diseases. Which statement correctly summarizes how antibiotics work?
A. They cause the bacterial cell to shrink through osmosis.
B. They interrupt processes vital to the bacteria.
C. They all mutate the DNA of bacteria.
D. They all prevent bacteria from absorbing food.
Answer 1:
I would say the answer is B.Antibiotics interfere with the structure of the cell wall that protects the bacterium.
Answer 2:
An antibiotic is a selective poison. It has been chosen so that it will kill the desired bacteria, but not the cells in your body. Each different type of antibiotic affects different bacteria in different ways. For example, an antibiotic might inhibit a bacterium's ability to turn glucose into energy, or its ability to construct its cell wall. When this happens, the bacterium dies instead of reproducing. At the same time, the antibiotic acts only on the bacterium's cell-wall-building mechanism, not on a normal cell's.http://health.howstuffworks.com/health-i…
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