Reading Test Sample One – Part C – Text 1

Read the passage about antibiotic resistance and answer the following questions.

TEXT 1
Antibiotic Resistance – A Growing Threat
Antibiotics, a class of medication that revolutionized medicine, are increasingly becoming less effective due to the rise of antibiotic-resistant bacteria. These resistant strains of bacteria can evade the effects of antibiotics, making it difficult to treat infections. The misuse and overuse of antibiotics are major contributors to this growing problem.

Patients often take antibiotics for viral infections, against which they are ineffective.
Incomplete antibiotic courses, where patients stop taking them prematurely, allow some bacteria to survive and potentially develop resistance.
The overuse of antibiotics in agriculture, to promote growth in livestock, also contributes to the emergence of resistant bacteria.

The consequences of antibiotic resistance are severe. Common infections that were once easily treated with antibiotics may become untreatable, leading to longer hospital stays, increased healthcare costs, and even death.

Healthcare professionals play a critical role in combating antibiotic resistance. They should:

Prescribe antibiotics only when necessary and for the appropriate duration.
Educate patients about the proper use of antibiotics and the importance of completing the prescribed course.

Everyone has a role to play in slowing the spread of antibiotic resistance. Here are some steps individuals can take:

Only take antibiotics when prescribed by a doctor and follow the instructions carefully, taking the full course even if you start to feel better.
Never share antibiotics with others.
Practice good hygiene to prevent infections in the first place, such as washing hands regularly and avoiding close contact with sick people.

By working together, healthcare professionals and the public can help ensure that antibiotics remain effective for future generations. The World Health Organization (WHO) has declared antibiotic resistance a global health emergency. They warn that without urgent action, the world is heading towards a post-antibiotic era, where even minor infections could become life-threatening.
The development of new antibiotics is crucial in the fight against resistance. However, the pharmaceutical industry has faced challenges in developing new and effective antibiotics due to the high cost of research and development, coupled with a limited return on investment.

Researchers are exploring alternative strategies to combat antibiotic resistance. These include:

Developing new classes of antibiotics with different mechanisms of action.
Phage therapy, which utilizes viruses that specifically target and kill bacteria.
Strengthening the immune system to better fight off infections.

The rise of antibiotic resistance is a serious threat to global health. By raising awareness, promoting responsible antibiotic use, and investing in research, we can work together to ensure that antibiotics remain effective for generations to come. Antibiotics revolutionized medicine by effectively combating bacterial infections. However, their overuse and misuse have led to the emergence of antibiotic-resistant bacteria, posing a significant public health threat.
Bacteria have evolved various mechanisms to evade the effects of antibiotics. Here’s a closer look at some common methods:

1. Inactivation or Modification: Bacteria may produce enzymes that break down or modify antibiotics, rendering them ineffective. For example, some bacteria produce enzymes like beta-lactamases, which can inactivate penicillin and other beta-lactam antibiotics.

2. Reduced Permeability: Bacteria can develop thicker cell walls or reduce the number of pores in their outer membranes, making it difficult for antibiotics to penetrate and reach their target within the cell.

3. Efflux Pumps: Bacteria can develop specialized pumps that actively remove antibiotics from the cell, reducing their concentration and effectiveness.

4. Target Modification: Bacteria may mutate the target site of an antibiotic, rendering the drug unable to bind and exert its action. For instance, some mutations alter the structure of proteins on the bacterial ribosome, where certain antibiotics work to inhibit protein synthesis.

5. Horizontal Gene Transfer: Bacteria can share genes encoding resistance mechanisms amongst themselves, even across different species. This allows rapid spread of resistance within bacterial populations.
The use of antibiotics creates a selective pressure on bacterial populations. Bacteria with natural or acquired resistance mechanisms have a higher chance of survival and reproduction. Over time, these resistant strains become more prevalent, making treatment of infections increasingly challenging.

Consequences of Resistance:

The emergence of antibiotic-resistant bacteria has several concerning consequences:

Increased Treatment Difficulty: Common infections that were once easily treated with antibiotics may become untreatable with existing medications. This necessitates the use of stronger, broader-spectrum antibiotics with potentially more side effects.
Longer Hospital Stays: Treatment of resistant infections can require longer hospital stays, increasing healthcare costs and burden on the healthcare system.
Increased Mortality: Untreated or poorly treated infections can lead to serious complications and even death.
Combating the Threat:
There’s an urgent need to address the issue of antibiotic resistance. Here are some key strategies:
Judicious Antibiotic Use: Prescribing antibiotics only when truly necessary, for the appropriate duration, and for the right bacterial infection are crucial.
Educating Patients and Healthcare Professionals: Raising awareness about antibiotic resistance and promoting responsible antibiotic use among both patients and healthcare providers is essential.
Developing New Antibiotics: Investment in research and development of novel antibiotics with different mechanisms of action is critical to combat resistance.
Exploring Alternative Strategies: Researching alternative interventions like phage therapy and immune system strengthening approaches offer potential solutions.
By understanding the mechanisms of resistance and implementing these strategies, we can work towards preserving the effectiveness of antibiotics and ensuring their continued role in combating bacterial infections for future generations.

Read the passage about antibiotic resistance and answer the following questions.

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