A recent study found that 480 bacterial strains freshly isolated from the soil are resistant to at least six different antibiotics. In fact, some isolates are resistant to 20 different antibiotic drugs. Why do you think these bacteria, which are neither pathogenic nor exposed to human use of antibiotics, are resistant to so many drugs? What might be the implications for human bacterial pathogens?

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Drug Resistance Bacteria can become resistant to the drug by excluding it from the c... View the full answer