Newbie: How to determine if a culture is contaminated?

jbphburg · #1 (**permalink**) 05-01-2008, 12:08 PM

Just started microbiology, is there a standard method for determining if an agar culture is contaminated?

danfive · #2 (**permalink**) 05-01-2008, 06:35 PM

Lots of methods. You can distinguish differences by physical characteristics (Gram stain, uniform colonies), biochemical characteristics (there are a series of different media to inoculate) and antibiotic sensitivity.

Look at a micro lab book like this one ---> http://itech.pjc.edu/fduncan/mcb1000/labmanual.pdf Page 67 is an exercise for determining unknown organisms.

danfive · #3 (**permalink**) 05-01-2008, 06:51 PM

Just found this, The online Microbiology Lab Manual ---> http://microbiology.mtsinai.on.ca/manual/default.asp

jbphburg · #4 (**permalink**) 05-01-2008, 07:16 PM

Thanks a lot, greatly appreciated!

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