When doing a quadrant streaking how do you determine if a colony is contaminated?

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When doing a quadrant streaking how do you determine if a colony is contaminated?

2006-08-01 06:01:36 · 3 answers · asked by mrkittypong 5 in Science & Mathematics ➔ Biology

3 answers

You have to wait till after incubation, then you can see if there is more than one by different characteristics

2006-08-01 06:36:01 · answer #1 · answered by kush_14 2 · 0⤊ 0⤋

you usually dont have a contaminated "colony" unless two or more colonies fuse together. What you usually have are different kinds of colonies on the same petri plate.
You need to isolate the colony of your choice (based on morphology) and culture it again in the broth.

2006-08-01 13:23:26 · answer #2 · answered by Zaphod B 2 · 0⤊ 0⤋

look at each quadrant seperately, if there is more than one type of colony growing then it is contaminated

2006-08-01 13:26:16 · answer #3 · answered by ~Perfectly Flawed~ 3 · 0⤊ 0⤋