Let's Talk Micro
Let's Talk Micro
Luis Plaza
212: Micro Minutes: Sometimes MacConkey Lies
10 minutes Posted Nov 7, 2025 at 12:00 am.
0:00
10:10
Download MP3
Show notes

Welcome to the very first Micro Minutes, a new quick-hit series from Let's Talk Micro designed for students, techs, and anyone who wants fast, practical microbiology insights in under 10 minutes.

In this episode, we tackle a common misconception that microbiologists can make at the bench when interpreting a single plate: MacConkey agar.

Many assume:

"If it doesn't grow on MacConkey, it's not a gram-negative rod."
"If it does grow on MacConkey, it must be a gram-negative rod."

Both are wrong — and today we break down why.

 

Stay connected with Let's Talk Micro:

 

Support the podcast: