… The answer is YES !
I got this question from a reader of this blog a few month ago on a previous post. I thought I would share the answer I had given him over here as well. Just in case a poor student, somewhere, spends time counting manually and googles something like “isn’t there a better way to do this ?” …
If you recall, I wrote about this app called Fast Counter, developed by Shazino, and available on the App Store. It does a very decent job counting bacteria on petri dishes, as long as there are not too small and dense.
For a drosophilist, the connection from counting colonies on a plate to counting flies on a pad is not too difficult to make. So I tried it by myself (because, really this was a high priority ;)) and it worked very well.
Of course, flies should not be too dense, and not sticking to each other. By setting the detection threshold in the app, you will actually get an extremely decent accurate number.
Here is an example of the read-out you get:
Pretty good stuff, huh ?
Maximal number of flies you can count would be around 200-300, accuracy of course is better if you put less.
Have you eve tried it ? If so, what are your impressions ?