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An explanation of how genetic material is shared between different types of bacteria.
The implications of a "post-antibiotic era" are profound. Routine medical procedures that rely on prophylactic antibiotics, such as joint replacements, organ transplants, and cancer chemotherapy, would become life-threateningly risky. Common infections, such as pneumonia, tuberculosis, and blood poisoning, could once again become fatal. The World Health Organization (WHO) has warned that antibiotic resistance threatens the very core of modern medicine and could result in a global economic burden comparable to the 2008 financial crisis, due to prolonged hospital stays and lost productivity.
Reasoning: This paragraph explains the "mechanism of resistance" (biology) and how "misuse and overuse" (human error) accelerates it. Note: While heading vii mentions "how resistance develops," heading ii captures both the biology and the human cause, which covers the full content of the paragraph better. An explanation of how genetic material is shared
: Resistant strains enter our bodies through the food chain and livestock raised for consumption. IELTS Reading Answer Key
— Animals grown for human consumption that carry bacteria Note: While heading vii mentions "how resistance develops,"
Biologically, antibiotic resistance is a natural evolutionary process. When a population of bacteria is exposed to an antibiotic, the majority of sensitive organisms are eradicated. However, a small minority may possess spontaneous genetic mutations that render them immune to the drug's effects. These surviving "superbugs" then reproduce, passing their resistant traits to subsequent generations. Furthermore, bacteria can share resistance genes horizontally with entirely different species through mechanisms like conjugation, transforming benign microbes into dangerous, untreatable pathogens.
While human misuse is a massive concern, the agricultural sector represents an even larger volumetric threat. Globally, a staggering percentage of medically important antibiotics are administered to livestock. Rather than treating sick animals, subtherapeutic doses are routinely mixed into animal feed and water to promote faster growth and prevent diseases caused by crowded, unsanitary farming conditions. This practice turns industrial farms into massive breeding grounds for resistant bacteria. These superbugs ultimately enter the human ecosystem through contaminated meat products, direct contact with agricultural workers, and runoff water that pollutes local crops and vital water supplies. Rather than treating sick animals
details factors like public health measures needed to solve the problem. Paragraph A describes the impact of the discovery of Penicillin. Paragraph E
Experts estimate that antimicrobial resistance (AMR) was directly responsible for 1.27 million deaths globally in 2019. Common IELTS Question Types and Key Answers
Longer hospital stays and more expensive alternative treatments. The "Post-Antibiotic Era":
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