Why does antibiotic resistance spread rapidly within bacterial biofilms under selective pressure?

💡 Explanation

Antibiotic resistance spreads quickly due to horizontal gene transfer; biofilms facilitate the exchange of genetic material carrying resistance genes. Mutation introduces novel traits, but transfer allows rapid dissemination because resistance genes can jump between organisms, therefore increasing adaptation speed rather than depending solely on slower mutation processes.

• Why does forced exhalation worsen asthma symptoms during an attack?
• If a patient's renal tubules fail to actively transport sodium ions out of the filtrate, which consequence follows?
• If a patient with anemia receives a blood transfusion, why does a temporary decrease in erythropoietin (EPO) production reduce reticulocyte count?
• Why does hyperglycemia increase urine output in diabetes related to renal function?
• Why does the effectiveness of tPA, a thrombolytic drug for ischemic stroke, diminish significantly after the initial hours following symptom onset?
• What causes impaired postprandial glucose control when GLP-1 receptor signaling diminishes in pancreatic beta cells?