Biofilms are like those stubborn, slimy blocks in the pipes that no drain cleaner can fully break—bacteria build a protective fortress. Their "quorum sensing" is like the colony's signal, a *chalo*, let's all stick together now, which makes them strong. They survive antibiotics because the drugs can't penetrate that gunk, just like my tools can't reach the core of a clog without dismantling the whole section. I see it every time I have to break open a pipe elbow; the real problem is always hidden deep inside, thriving in its own mess.
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