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Dual action antibiotic could make bacterial resistance nearly impossible

phys.org

21–30 of 87 posts

Re: Dual action antibiotic could make bacterial resistance nearly impossible

#21
post #19

> 100 million times do you know how many bacteria, all mutating and swapping genes, there are out there? also, dual therapy, particularly for TB has been used for years, but TB is still with us.

> also, dual therapy, particularly for TB has been used for years, but TB is still with us

1/4 people carry TB in the world. Most asymptomatic.

TB been with humans as long as humans have been around, and it will be with humans as long as we're here.

Multidrug Resistent TB is a thing though.

Re: Dual action antibiotic could make bacterial resistance nearly impossible

#23
post #10

It’s unclear why the same benefit couldn’t be achieved by mixing two traditional antibiotics with different mechanisms of action. Maybe the combined dosage would stress the liver too much?

Last year I was hospitalized and quarantined for Tuberculosis, which is fairly strong against antibiotics so the antibiotic therapy is 6 months long (minimum), and that's precisely how I was treated, by combining first 4 then 2 antibiotics in order to prevent the bacteria from developing resistance, but you're right, it's super bad for your liver, I've seen heavy alcoholic patients in the same ward that were refused…

What's the best way to allow the liver to recover after such heavy medication?

Re: Dual action antibiotic could make bacterial resistance nearly impossible

#24
Well, aside from the generic defense mechanism of pumping unwanted chemicals out of the bacterial cell, or an enzyme for degrading the antibiotic.

Multiple mutations could also occur if the cells are being exposed to sublethal amounts of the antibiotic, say in sewers (which would also be an environment for evolution of enzymes to degrade the chemical.)

Re: Dual action antibiotic could make bacterial resistance nearly impossible

#25
post #4

It’s unclear why the same benefit couldn’t be achieved by mixing two traditional antibiotics with different mechanisms of action. Maybe the combined dosage would stress the liver too much?

Bacteria can develop resistance to individual antibiotic mechanism. Then two strains can swap resistance genes to produce a super-bug: https://asm.org/articles/2023/january/plasmids-and-the-sprea... My understanding is that in this case bacteria would have to develop resistance to two mechanisms at the same time, which is much more difficult. Mandatory quote: "Life, uh, finds a way"

And if, in this case, life does find a way, then what? Is this not a recipe to create a super super bug?

Re: Dual action antibiotic could make bacterial resistance nearly impossible

#26
Don't know much about microbiology, but saw this ( https://www.youtube.com/watch?v=VPSm9gJkPxU ) video about biological "motors" which allow for movement in the organisms (chemotaxis). In the end, they speculate that future antibiotics could target a bacteria's motors to disrupt its movement. Not sure how difficult will it be for the bacteria to gain resistance to this approach.

Re: Dual action antibiotic could make bacterial resistance nearly impossible

#29
post #4

Earlier quoted context omitted.

Bacteria can develop resistance to individual antibiotic mechanism. Then two strains can swap resistance genes to produce a super-bug: https://asm.org/articles/2023/january/plasmids-and-the-sprea... My understanding is that in this case bacteria would have to develop resistance to two mechanisms at the same time, which is much more difficult. Mandatory quote: "Life, uh, finds a way"

And if, in this case, life does find a way, then what? Is this not a recipe to create a super super bug?

It's a probability game isn't it. There's a chance of that super super bug given normal antibiotics. But also chances are that any super super bug is going to have a downside that stops it spreading unhindered through other hosts or something like that.

There's always the possibility of a microbe/prion/other that can attack and consume all DNA based life forms. Or a 'nearby' gamma ray burst that sterilises everything within 200 light years.

Re: Dual action antibiotic could make bacterial resistance nearly impossible

#30
post #4

It’s unclear why the same benefit couldn’t be achieved by mixing two traditional antibiotics with different mechanisms of action. Maybe the combined dosage would stress the liver too much?

Bacteria can develop resistance to individual antibiotic mechanism. Then two strains can swap resistance genes to produce a super-bug: https://asm.org/articles/2023/january/plasmids-and-the-sprea... My understanding is that in this case bacteria would have to develop resistance to two mechanisms at the same time, which is much more difficult. Mandatory quote: "Life, uh, finds a way"

I'm embarrassed to admit that I clicked into the comments looking for that, uh, quote.
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