Carbapenem resistance appears suddenly across multiple
bacterial species in different hospitals and countries within a short time
frame. Genetic analysis reveals the same resistance gene on mobile plasmids in
each isolate.

Over time, what evolutionary process most likely
explains the global spread of this resistance?

Question

Carbapenem resistance appears suddenly across multiple
bacterial species in different hospitals and countries within a short time
frame. Genetic analysis reveals the same resistance gene on mobile plasmids in
each isolate.

Over time, what evolutionary process most likely
explains the global spread of this resistance?

Accepted Answer

Rapid
dissemination via horizontal gene transfer under antibiotic pressure

Answer

Independent
directional selection in each species

Answer

Stabilizing
selection favouring ancestral genotypes

Answer

Genetic
drift due to population bottlenecks

Crowdly

Carbapenem resistance appears suddenly across multiple bacterial species in dif...

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