RE: When Bacteria Create False Miracles
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I don't often come across Serratia with that textbook red color. More often than not, they are of the boring gray-ish colonies.
Although, on the Chrome agar, it's not uncommon for them to display Halloween-themed colors of orange with black outlines. I'll see if I can take a pic of it the next time I see it.
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I've been away from the lab and we don't really culture bacteria often as I'd expect because most of the gram negative species can be identified with quick test kits. Only gram negative organisms get cultured for reasons I have yet to know as my exposure was abruptly cut short due to quarantine. Looking forward to that pic :D
You should be culturing whatever you are doing susceptibility testing on.
Rapid identifications are just that, for the clinicians' information. When work volumes get high, we skip straight to the sensitivity testing and hope for the best.
Ideals vs practical, some cost cuttings have to be made living in the 3rd world, doesn't happen often but if the patient can't afford we just hope the antibiotics do their work otherwise its standard culture and sensitivity. Lab costs are like 1/3 to 2/4 of the hospital bill here. Yeah we got whacked health care.
That is unfortunate.