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Subject: Specific Diseases

  • Antibiotic-resistant infections: Risks, costs

    Why in the News

    Infections caused by antibiotic resistant bacteria are more likely to kill hospitalised patients in India and cost more to treat than infections caused by drug susceptible strains. A surveillance study by the Indian Council of Medical Research (ICMR) records higher mortality, longer hospital stays and higher antibiotic costs where the bacteria resist carbapenems, the broad spectrum antibiotics doctors hold in reserve for serious infections. The study links laboratory resistance results to what then happened to the patient, which Indian resistance surveillance had not previously done at this scale. Most of the severe infections it recorded began inside the hospital rather than in the community. The tension it sets up is between the search for the next antibiotic and the routine work of preventing infection in the first place.

    What is antimicrobial resistance?

    1. Bacteria survive the drugs meant to kill them: Resistant bacteria continue to grow and reproduce in the presence of antibiotics designed to stop them. Treatment narrows to whatever the organism still responds to.
    2. Resistance spreads sideways, not only down generations: Resistant bacteria pass resistance genes to their offspring. They also transfer those genes to unrelated bacteria through the exchange of DNA.
    3. Carbapenem resistance closes the reserve line: Carbapenems are held back for serious infections where other antibiotics have already failed. Resistance to them leaves few effective options behind.

    What did the ICMR surveillance study cover?

    1. Scale and period: The ICMR antimicrobial resistance (AMR) surveillance network studied 159,336 hospitalised patients across 20 tertiary care hospitals between April 2022 and April 2025.
    2. Two of the four bacteria tracked: Escherichia coli causes urinary tract infections. Klebsiella pneumoniae triggers both urinary and lung infections.
    3. The other two: Acinetobacter baumannii causes ventilator associated pneumonia, bloodstream infections, wound and surgical site infections, urinary tract infections and sometimes meningitis. Pseudomonas aeruginosa causes bloodstream, eye and ear infections.
    4. Resistance was the majority finding: Almost 61.1 percent of the patients studied carried infections resistant to carbapenem antibiotics.

    How much does carbapenem resistance raise the risk of death?

    1. Escherichia coli: 24.4 percent of patients with carbapenem resistant infections died, against 17.3 percent of those with susceptible infections. That is a 41 percent higher relative risk of death.
    2. Klebsiella pneumoniae: Mortality was 31.2 percent in the resistant group against 23.5 percent in the susceptible group, a 33 percent higher relative risk.
    3. Acinetobacter baumannii: Mortality was 37.9 percent against 32.8 percent, a 16 percent higher relative risk.
    4. Pseudomonas aeruginosa: Mortality was 28.9 percent against 20.2 percent, a 43 percent higher relative risk.
    5. Bloodstream infections carry the heaviest toll: Among patients with carbapenem resistant bloodstream infections, mortality ran from 39.3 percent for E. coli to 50.8 percent for A. baumannii. It was 44.8 percent for K. pneumoniae and 46.4 percent for P. aeruginosa.

    What does resistance add to the cost of treatment?

    1. Escherichia coli: Antibiotic cost averaged about Rs 39,846 per patient for resistant infections against Rs 20,034 for susceptible ones.
    2. Klebsiella pneumoniae: The corresponding figures were about Rs 55,688 and Rs 47,918.
    3. Acinetobacter baumannii: Treatment cost about Rs 62,150 for resistant infections against Rs 41,372 for susceptible ones.
    4. Pseudomonas aeruginosa: Treatment cost about Rs 66,599 for resistant infections against Rs 48,392 for susceptible ones.
    5. The costing is deliberately conservative: Only antibiotics priced under the Jan Aushadhi scheme were counted. Intensive care, bed and room charges, diagnostic investigations, procedures, supportive care and consultation were all left out, so the real burden on patients and the health system is larger.

    Why does the study point to infection control rather than antibiotic overuse?

    1. The severe infections began in the hospital: More than 85 percent of bloodstream infections across the four bacteria were classified as healthcare associated.
    2. The named failure points are procedural: Healthcare associated transmission, invasive devices, recent surgery and gaps in infection prevention and timely diagnosis are what the study identifies. Reducing the problem to antibiotic overuse alone misplaces it.
    3. Antibiotics cannot substitute for prevention: The measures named are hand hygiene, device associated infection prevention, appropriate insertion and early removal of invasive devices, environmental cleaning, surgical infection prevention and surveillance of healthcare associated infections. Prevention stops the reserve antibiotics from being needed at all.
    4. Diagnostics decide whether prescribing is targeted: Timely diagnostics let a doctor identify the resistant organism and select a narrow, appropriate antibiotic. Without them, broad spectrum drugs are used by default.
    5. Surveillance has to reach the patient, not stop at the isolate: Integrated surveillance connecting laboratory results with mortality and treatment outcomes is what produced these findings. Prescribing data alone would not have shown them.

    What the study could not establish

    1. A tertiary hospital population is not a national average: These hospitals manage referred and often critically ill patients, so the level of resistance found there cannot be read as the level in the country.
    2. Key clinical variables were absent: The data carried no patient level information on how sick each patient was, how quickly appropriate treatment began, the source of the infection or the specific resistance mechanism involved.
    3. The findings describe practice, not drug superiority: The results reflect real world treatment patterns in India. They do not prove that one drug is universally better than another.

    Challenges to containing antimicrobial resistance in India

    1. Antibiotics move without a prescription: Schedule H1 of the Drugs and Cosmetics Rules, 1945 requires a prescription and a separate sales register for named antibiotics, and compliance at the retail counter is weak. Eg. The Red Line campaign marks such medicines with a red stripe on the pack precisely because the schedule alone was not restricting sales.
      The Fix: Link Schedule H1 sales to an electronic prescription record, so the register is generated by the transaction instead of written up after it.
    2. Non human antibiotic use applies constant selection pressure: Antibiotics used for growth promotion and disease prevention in poultry and aquaculture select for resistant bacteria outside any clinical setting. Eg. India banned colistin, a last resort human antibiotic, in food producing animals in 2019 after its use in poultry farming was documented.
      The Fix: Replace single drug bans with a positive list of permitted veterinary antibiotics, enforced through residue testing at the point of procurement.
    3. Manufacturing effluent breeds resistance in the environment: Antibiotic residues discharged from pharmaceutical plants expose environmental bacteria to sub lethal drug concentrations, which is the condition in which resistance develops. Eg. Water bodies receiving effluent from the pharmaceutical cluster at Patancheru near Hyderabad have recorded high antibiotic concentrations.
      The Fix: Notify enforceable antibiotic residue limits for pharmaceutical effluent and make compliance a condition of the plant’s consent to operate.
    4. Infection prevention has no staffing floor: Most Indian hospitals run no dedicated infection control team to conduct hand hygiene and device audits, so prevention has no one accountable for it. Eg. National Accreditation Board for Hospitals and Healthcare Providers (NABH) accreditation requires an infection control programme, and it covers a small share of India’s hospitals.
      The Fix: Make a minimum infection prevention and control staffing norm a condition of hospital empanelment under Ayushman Bharat Pradhan Mantri Jan Arogya Yojana.
    5. Diagnostic delay forces empirical prescribing: Culture and sensitivity testing capacity sits mainly in large hospitals, and results take days, so smaller facilities start broad spectrum therapy blind. Eg. Rapid molecular testing is routine for drug resistant tuberculosis under the National Tuberculosis Elimination Programme, with no equivalent programme for bacterial bloodstream infections.
      The Fix: Fund rapid molecular resistance testing at district hospital level and tie its use to the hospital’s antibiotic prescribing audit.

    Conclusion

    India’s resistance response has been organised around what is prescribed, because prescribing is what the system can already count. This study relocates the problem to where the infection is acquired, which is a different task with a different owner inside the hospital. The unresolved part is that prevention carries no staffing norm, no dedicated budget line and no measurable output of its own, while prescribing has a surveillance network behind it. The marker to watch is whether prevention starts being counted the way prescribing already is.

    Back2Basics: Jan Aushadhi scheme

    1. What it is: The Pradhan Mantri Bhartiya Janaushadhi Pariyojana supplies quality generic medicines at prices well below their branded equivalents.
    2. Who runs it: It is implemented by the Department of Pharmaceuticals under the Ministry of Chemicals and Fertilizers, through the Pharmaceuticals and Medical Devices Bureau of India.
    3. How it reaches patients: Medicines are sold through dedicated Janaushadhi Kendras rather than through ordinary retail pharmacies.

    [2019] Which of the following are the reasons for the occurrence of multi-drug resistance in microbial pathogens in India?

    1. Genetic predisposition of some people

    2. Taking incorrect doses of antibiotics to cure diseases

    3. Using antibiotics in livestock farming

    4. Multiple chronic diseases in some people

    Select the correct answer using the code given below.

    (a) 1 and 2

    (b) 2 and 3 only

    (c) 1, 3 and 4

    (d) 2, 3 and 4

  • Bhutan leads Southeast Asia region in eliminating rabies

    Bhutan leads Southeast Asia region in eliminating rabies

    Why in News?

    • WHO has validated Bhutan as the first country in the South-East Asia Region to eliminate dog-transmitted rabies as a public health problem. India aims to eliminate human deaths from dog-mediated rabies by 2030.

    What does WHO Validation Mean?

    • Not virus eradication: It means elimination of human deaths from dog-mediated rabies.
    • The virus may still exist in wildlife reservoirs.
    • 2 years: No human deaths from dog-mediated rabies for at least two consecutive years.
    • The country must demonstrate capacity to prevent re-emergence through surveillance and response.

    How did Bhutan achieve it?

    Two-pronged strategy

    • Mass vaccination of dogs to control infection at source.
    • Post-Exposure Prophylaxis (PEP) for exposed humans:
      • Wound washing with soap and water
      • Rabies vaccine
      • Rabies immunoglobulin where required

    One Health approach

    • Coordination between:
      • Ministry of Health
      • Ministry of Agriculture and Livestock
      • Local governments
      • Veterinary workers
      • Communities
    • De-suung volunteers, called “Guardians of Peace”, supported vaccination and awareness.

    Why is Rabies a Major Challenge for India?

    • ~59,000: Global rabies deaths annually.
    • ~1/3: Share of global deaths occurring in India.
    • ~96%: Rabies mortality and morbidity associated with dog bites.
    • Rabies is endemic across most of India.
    • Exceptions: Andaman & Nicobar Islands and Lakshadweep.
    • Once clinical symptoms appear, rabies is almost always fatal.

    What does India need for the 2030 Target?

    1. Dog vaccination

    • Achieve around 70% vaccination coverage.
    • Conduct annual mass vaccination campaigns.
    • Publish district-level vaccination coverage.

    2. Dog population management

    • Strengthen municipal sterilisation and vaccination programmes.
    • Link funding to verified vaccination coverage, rather than only sterilisation numbers.

    3. Better PEP access

    • Decentralise rabies immunoglobulin to lower-level health facilities.
    • Improve rural access to complete PEP.

    4. Strong surveillance

    • Make human and animal rabies nationally notifiable.
    • Improve case-based reporting and mortality estimation.

    5. One Health coordination

    • Integrate human health, animal health and environmental health.
    • Strengthen coordination among health, animal husbandry and wildlife agencies.

    One Health

    • Definition: An integrated approach linking human, animal and environmental health.
    • Rabies is a classic One Health disease because:
      • Reservoir: Mainly animals
      • Transmission: Animal to human
      • Outcome: Human disease and death
    • India has established the National One Health Mission for coordination on zoonotic diseases.

    Prelims Quick Revision

    • 59,000: Approximate global rabies deaths annually.
    • 1/3: Approximate share occurring in India.
    • 96%: Mortality and morbidity associated with dog bites.
    • 70%: Approximate dog vaccination coverage required to interrupt transmission.
    • 2 years: Disease-free period relevant to WHO validation.
    • 2030: Target for eliminating human deaths from dog-mediated rabies.
    • Rabies elimination ≠ rabies virus eradication

    [2014] Consider the following diseases:

    1. Diphtheria

    2. Chickenpox

    3. Smallpox

    Which of the above diseases has/have been eradicated in India?

    (a) 1 and 2 only

    (b) 3 only

    (c) 1, 2 and 3 only

    (d) None of the above

  • All four dengue virus serotypes found co-circulating nationally, ICMR-VRDL study finds

    Why in News?

    A two year Indian Council of Medical Research-Virus Research and Diagnostic Laboratory (ICMR-VRDL) surveillance study finds all four dengue virus serotypes co-circulating nationally, raising hyperendemicity concerns and complicating future vaccine rollout.

      Key Highlights

      1. Study duration: Conducted over two years through nationwide surveillance.
      2. Conducting body: ICMR-Virus Research and Diagnostic Laboratory (VRDL) Network.
      3. Key concern: Simultaneous circulation of all serotypes indicates hyperendemicity, increasing the risk of severe dengue and complicating vaccine strategies.
        • Note: A serotype is a distinct subgroup or variation of a microorganism (such as a bacterium or virus) classified by the specific antigens found on its surface

      What is Dengue?

      1. Dengue is a viral disease caused by the dengue virus (DENV).
      2. It is transmitted by the female Aedes aegypti mosquito (also Aedes albopictus).
      3. The virus has four distinct serotypes: DENV-1, DENV-2, DENV-3 and DENV-4.
      4. Infection with one serotype provides lifelong immunity only against that serotype and temporary protection against the others.

      What is Hyperendemicity?

      1. Hyperendemicity refers to the simultaneous circulation of multiple serotypes of the same pathogen in a region.
      2. It increases the likelihood of secondary infections, which can lead to severe dengue due to Antibody-Dependent Enhancement (ADE).

      About the ICMR-VRDL Network

      • Established by the Indian Council of Medical Research (ICMR).
      • Functions as a nationwide network for diagnosis, surveillance and research on viral diseases.
      • Supports early detection and monitoring of emerging and re-emerging viral infections.

      [2017] Consider the following statements:
      1. In tropical regions, Zika virus disease is transmitted by the same mosquito that transmits dengue.
      2. Sexual transmission of Zika virus disease is possible.
      Which of the statements given above is/are correct?

      [A] 1 only

      [B] 2 only

      [C] Both 1 and 2

      [D] Neither 1 nor 2

    1. Consider the following statements

      Consider the following statements:
      1. Every individual in the population is equally susceptible host for Swine Flu.
      2. Antibiotics have no role in the primary treatment of Swine Flu
      3. To prevent the future spread of Swine Flu in the epidemic area, the swine (pigs) must all be culled
      Which of the statements given above is/are correct?

    2. Consider the following statements

      Consider the following statements:
      1. Hepatitis B is several times more infectious than HIV/AIDS
      2. Hepatitis B can cause liver cancer
      Which of the statement given above is/are correct?

    3. Consider the following pairs

      Consider the following pairs :
      Vitamin : Deficiency disease
      1. Vitamin C : Scurvy
      2. Vitamin D : Rickets
      3. Vitamin E : Night Blindness
      Which of the pairs given above is/are correctly matched?

    4. Consider the following statements

      Consider the following statements:

      1. In tropical regions, Zika virus disease is transmitted by the same mosquito that transmits dengue.
      2. Sexual transmission of Zika virus disease is possible.

      Which of the statements given above is/are correct?

    5. Consider the following

      Consider the following:

      1. Birds
      2. Dust blowing
      3. Rain
      4. Wind blowing

      Which of the above spread plant diseases?

    6. Consider the following statements

      Consider the following statements:

      1.Adenoviruses have single-stranded DNA genomes, whereas retroviruses have double-stranded DNA genomes.
      2.The common cold is sometimes caused by an adenovirus, whereas AIDS is caused by a retrovirus.
      Which of the statements given above is/are correct?

    7. Next Generation Nanomedicine for Breast Cancer

      Why in the news?

      Scientists from Agharkar Research Institute developed a biodegradable nanomedicine platform capable of silencing cancer driving genes in breast cancer cells, offering a promising precision oncology therapy.

      Key Highlights

      • Research published in: Advanced Healthcare Materials.
      • Developed under: Department of Science and Technology.
      • Uses: Targeted gene silencing strategy.
      • Aim: Effective tumour inhibition with minimal toxicity.

      What is Nanomedicine?

      Nanomedicine refers to the use of nanoscale materials and technology for:

      • Diagnosis
      • Drug delivery
      • Treatment of diseases.

      What is Precision Nanomedicine?

      • Precision nanomedicine: Targets disease causing cells specifically.
      • Reduces:
        • Damage to healthy tissues.
        • Side effects associated with conventional therapies.

      Key Technology Used

      Mesoporous Silica Nanoparticles

      • Biodegradable nanoparticles with:
        • High drug loading capacity.
        • Tunable surface chemistry.
      • Used to deliver: Small interfering RNA (siRNA).

      What is siRNA?

      • Small interfering RNA (siRNA): Molecules that silence specific genes by preventing protein production.
      • Used in:
        • Gene therapy
        • Cancer treatment research.

      [2015] With reference to the use of nanotechnology in health sector, which of the following statements is/are correct?
      1.Targeted drug delivery is made possible by nanotechnology
      2.Nanotechnology can largely contribute to gene therapy
      Select the correct answer using the code given below.

      [A] 1 only

      [B] 2 only

      [C] Both 1 and 2

      [D] Neither 1 nor 2