The growing threat of antimicrobial resistance (AMR) has become one of the world’s most pressing public health concerns. According to the World Health Organization (WHO), bacterial antimicrobial resistance (AMR) directly causes almost 1.27 million deaths each year and contributes to approximately 4.95 million deaths worldwide. If effective measures are not taken, WHO and global public health agencies project that AMR could contribute to 10 million deaths annually by 2050, surpassing deaths from many major diseases. Despite repeated awareness campaigns, antibiotics continue to be misused for viral diseases such as the common cold, flu, COVID-19 and dengue. This unnecessary use accelerates antibiotic resistance, making bacterial infections more difficult, and sometimes impossible, to treat.
The concept in simple terms
People often confuse bacteria and viruses, assuming that antibiotics can treat both. In reality, they are fundamentally different.What are bacteria?Bacteria are single-celled living organisms. They possess their own cellular machinery, which allows them to grow, reproduce and survive independently in suitable environments.
- Most bacteria are harmless or even beneficial.
- Some help digest food and produce vitamins.
- Others cause diseases such as tuberculosis, typhoid fever, pneumonia and urinary tract infections.
What are viruses?Viruses are not considered fully living organisms because they cannot survive or reproduce independently.A virus is mainly made up of:
- Genetic material (DNA or RNA)
- A protective protein layer
- Sometimes an outer lipid envelope
Unlike bacteria, viruses must invade a host cell and hijack its machinery to make copies.Common viral illnesses include:
- the flu
- COVID 19
- measles
- chicken pox
- hiv
- dengue fever
- Hepatitis
Why antibiotics fail against virusesAntibiotics target structures or processes found only in bacteria, such as:
- Formation of the cell wall
- Protein synthesis
- DNA replication
- Metabolic pathways
Viruses do not have these bacterial structures. Because they reproduce with human cells, antibiotics have nothing to attack, making them completely ineffective against viral infections.In contrast, viral diseases are treated with:
- Antiviral drugs (for certain viruses)
- Vaccines (to prevent infections)
- Supportive care, such as hydration and fever control
how it works
Understanding how bacteria and viruses behave explains why antibiotics work against some but not others.How bacteria multiplyBacteria reproduce by binary fission, where a bacterial cell divides into two identical daughter cells. During this process:
- Bacterial DNA replicates.
- The cell grows.
- The cell wall forms a dividing partition.
- Two new bacterial cells are produced.
Antibiotics interrupt one or more of these steps, stopping bacterial growth or killing the bacteria.How viruses multiplyViruses cannot reproduce by themselves. Its life cycle includes:
- Adhesion to a host cell.
- Entrance to the cell.
- Release of viral genetic material.
- Replication by the host cell machinery.
- Assembly of new virus particles.
- Release to infect other cells.
Because viruses depend almost entirely on human cells for replication, drugs must target viral proteins without damaging healthy human cells, a much more difficult task than treating bacterial infections.
What is Antimicrobial Resistance (AMR)?
Antimicrobial resistance occurs when microorganisms evolve so that drugs no longer kill them effectively.AMR includes resistance in:
- Bacteria (antibiotic resistance)
- Viruses (antiviral resistance)
- Fungi (antifungal resistance)
- Parasites (antiparasitic resistance)
The most common and serious form is antibiotic resistance.How antibiotic resistance developsWhen antibiotics are used:
- Most bacteria die.
- Some naturally resistant bacteria survive.
- These resistant bacteria multiply.
- They can also transfer resistance genes to other bacteria.
Over time, antibiotics become less effective.Main causes
- Use of antibiotics for viral infections
- Self-medication
- Incomplete courses of antibiotics
- Prescription excess
- Use of antibiotics in livestock and poultry
- Poor sanitation and infection control
What are the consequences?
- Longer hospital stays
- Rising medical costs
- Higher mortality
- More difficult surgeries
- Reduction in the effectiveness of chemotherapy and organ transplantation
WHO considers AMR to be one of the major global health threats of the 21st century.
Important institutions, laws or treaties
World Health Organization (WHO)It coordinates the Global Action Plan on Antimicrobial Resistance and promotes the rational use of antibiotics. The organization also promotes surveillance of resistant infections worldwide.Organization for Agriculture and Food (FAO)Addresses the use of antibiotics in agriculture and animal husbandry.World Organization for Animal Health (WOAH)Develop standards for the responsible use of antimicrobials in animals.United Nations (UN)In 2016, the United Nations General Assembly adopted a political declaration recognizing AMR as a major global threat requiring coordinated international action.Global Antimicrobial Use and Resistance Surveillance System (GLASS)Launched by WHO to collect standardized global data on antimicrobial resistance and antibiotic consumption.
English from India
India has one of the highest burdens of infectious diseases in the world and is also among the largest consumers of antibiotics.Key initiativesNational Action Plan on Antimicrobial Resistance (NAP-AMR)Launched in 2017, it focuses on:
- Public awareness
- Vigilance
- Prevention of infections
- Rational use of antibiotics
- Research and innovation
Red line campaignMedicines containing antibiotics have a red vertical line on their packaging, reminding people that these medicines should only be taken with a doctor’s prescription.Annex H and Annex H1 medicinesThese antibiotics cannot be legally sold without a valid prescription.
National Center for Disease Control (NCDC)- It coordinates AMR surveillance in India.
Indian Council of Medical Research (ICMR)
It conducts national surveillance and research on resistant bacteria and promotes antibiotic stewardship programs in hospitals.Challenges in India
- Easy availability of over-the-counter antibiotics
- Self-medication
- High burden of infectious diseases
- Poor hygiene in some regions
- Use of antibiotics in livestock
Preliminary data box
A main questionQ. Antimicrobial resistance has become one of the great public health challenges of the 21st century. Discuss the causes, consequences and measures taken globally and by India to combat antimicrobial resistance.MCQs with answers1. Antibiotics are mainly effective against:A. VirusesB. FungiC. BacteriaD. ParasitesAnswer: C2. Which of the following is reproduced by binary fission?A. VirusesB. BacteriaC. PrionD. ViroidAnswer: B3. Which organization launched GLASS?A. UNESCOB. WHOC. UNICEFD. FAOAnswer: B4. The Red Line campaign in India is associated with:A. Blood donationB. VaccinationC. Rational use of antibioticsD. HIV awarenessAnswer: C5. Which statement is correct?A. Antibiotics destroy viral envelopes.B. Viruses have their own metabolism.C. Antibiotics target bacterial structures absent in viruses.D. Viruses divide by binary fission.Answer: CFive key terms to remember
- Antibiotic: A drug that kills or inhibits the growth of bacteria.
- Virus: A microscopic infectious agent that can reproduce only inside living cells.
- Binary fission: process by which bacteria divide into two identical cells.
- Antimicrobial resistance (AMR): the ability of microorganisms to resist the effects of drugs designed to kill them.
- Antibiotic Stewardship: Coordinated efforts to ensure that antibiotics are used appropriately to preserve their effectiveness.
Frequently asked questions1. Can antibiotics cure viral fever?no Antibiotics are ineffective against viral infections. Most viral fevers require supportive care unless a specific antiviral medication is available.2. Why do doctors sometimes prescribe antibiotics during viral illnesses?If there is evidence or a high risk of a secondary bacterial infection, antibiotics may be prescribed to treat the bacterial infection, not the virus itself.3. What is the difference between antibiotics and antivirals?Antibiotics target bacteria by altering bacterial structures or functions, while antivirals inhibit specific stages of viral replication.4. Why is the misuse of antibiotics dangerous?Misuse promotes antibiotic resistance, making future bacterial infections more difficult to treat and increasing the risk of serious illness and death.5. How can antimicrobial resistance be prevented?AMR can be reduced by using antibiotics only when prescribed, completing the full course of treatment, maintaining good hygiene, getting vaccinated, avoiding infections, and avoiding unnecessary antibiotic use in humans and animals.