According to NIH studies, antibiotics have saved many lives since they were first discovered and have revolutionized the treatment of infectious diseases on a global scale. However, their overuse and misuse in human and veterinary medicine have resulted in the current global antibiotic-resistance crisis. A study published in the journal Lancet reported that drug resistance was responsible for more than one million deaths in 2019. A single course of antibiotics was found to alter the gut microbiomes of healthy volunteers, and it can take months to years to recover the original desirable species. Antibiotics do not treat viral infections but are often given to prevent a growth of bacteria that can follow a viral illness. According to research at University Hospital Vall d’Hebron in Barcelona, Francisco Guarner was reported as pointing out that antibiotics can destroy some healthy bacteria and allow other microorganisms to overgrow. This alters the healthy balance. Microorganisms that become resistant to antibiotics can even “teach” other organisms to also become resistant.
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