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.
Contents13
- A1 and 2
- B2 and 3 only
- C1, 3 and 4
- D2, 3 and 4
Show answer
Answer: (B) 2 and 3 only
The correct answer is (B) — 2 and 3 only.
Multi-drug resistance (MDR) in bacteria is mainly caused by:
- incorrect or incomplete antibiotic use by people (statement 2) — taking wrong doses lets bacteria survive and develop resistance;
- and overuse of antibiotics in livestock farming (statement 3) — antibiotics fed to animals create resistant bacteria that can spread to humans.
Statement 1 is wrong because genetic predisposition of people does not cause bacteria to become drug-resistant.
Statement 4 is wrong because having multiple chronic diseases does not directly cause MDR in bacteria.
Tip: MDR = wrong antibiotic use by humans + antibiotic overuse in animals.
Multi-drug resistance occurs when bacteria survive antibiotic treatment and develop immunity to multiple drugs, making infections harder to treat.
Around 2017-2019, India faced increasing concerns about antibiotic resistance due to overuse in both human medicine and livestock farming, making this a priority health policy issue.
The question tests whether students can distinguish between direct causes of bacterial resistance (antibiotic misuse) versus patient factors that don't create resistance in the bacteria themselves.
Multi-Drug Resistance in Bacteria
Science And Technology multi-drug resistance microbial pathogens
Multi-Drug Resistance: Causes & Prevention Strategies
MDR occurs when bacteria survive exposure to multiple antibiotics
Main causes: incorrect antibiotic use by humans + overuse in livestock
Human genetics and chronic diseases do NOT cause bacterial MDR
MDR bacteria can spread from animals to humans through food chain
Multi-Drug Resistance (MDR) means bacteria can survive treatment with multiple antibiotics that should normally kill them. This happens when bacteria evolve survival mechanisms — not because of human genetic factors or disease conditions.
Causes of MDR: Correct vs Incorrect
Factor | Causes MDR? | Mechanism | Example |
|---|---|---|---|
Incorrect antibiotic doses | ✓ YES | Bacteria survive partial treatment, develop resistance | Taking antibiotics for 3 days instead of 7 |
Livestock antibiotic use | ✓ YES | Resistant bacteria in animals spread to humans | Antibiotics in poultry feed create resistant Salmonella |
Human genetic predisposition | ✗ NO | Genetics affect human immunity, not bacterial resistance | Some people get infections easily but bacteria resistance is independent |
Multiple chronic diseases | ✗ NO | Diseases weaken immunity but don't make bacteria resistant | Diabetes patients get more infections but bacteria aren't more resistant |
How MDR Develops
%%{init: {"flowchart": {"wrappingWidth": 460}}}%%
flowchart TD
s1["`**Antibiotic Treatment**
Patient takes antibiotics for bacterial infection`"]
s2["`**Incomplete Killing**
**Wrong dose/duration** → some bacteria survive`"]
s3["`**Resistance Genes**
Surviving bacteria have **natural mutations** that resist the drug`"]
s4["`**Rapid Multiplication**
Resistant bacteria multiply faster than sensitive ones`"]
s5["`**MDR Population**
Next infection has mostly **drug-resistant bacteria**`"]
s1 --> s2
s2 --> s3
s3 --> s4
s4 --> s5Question Analysis
This PYQ tested whether students understand what actually causes bacterial resistance. The trap was including human factors (genetics, chronic diseases) that affect infection susceptibility but don't create resistant bacteria.
Trap: Genetic predisposition makes people more prone to infections but doesn't make bacteria drug-resistant
Trap: Chronic diseases weaken immunity but bacteria develop resistance independently of patient's health status
Remember: MDR is about bacterial evolution, not human health conditions
UPSC Pattern: Questions often mix correct causes (antibiotic misuse) with incorrect human factors
Antibiotic Misuse & Resistance
Science And Technology incorrect doses antibiotics
Antibiotic Misuse: Types & Consequences for MDR
Incorrect doses = wrong amount, duration, or type of antibiotic
Incomplete courses allow resistant bacteria to survive and multiply
Self-medication without prescription drives resistance
Types of Antibiotic Misuse
Misuse Type | Common Example | How It Creates MDR | Prevention |
|---|---|---|---|
Under-dosing | Taking half the prescribed amount | Sub-lethal doses kill weak bacteria, strong ones survive | Follow exact prescription |
Incomplete course | Stopping when symptoms improve | Remaining bacteria are naturally more resistant | Complete full course even if feeling better |
Wrong antibiotic | Using leftover pills for different illness | Ineffective drug creates selection pressure | Get proper diagnosis first |
Self-medication | Buying antibiotics without prescription | No medical guidance on correct choice/dose | Consult doctor for any bacterial infection |
India-Specific Challenges
Over-the-counter availability: Many antibiotics sold without prescription in India
Cost factors: Patients often buy shorter courses due to expense
Incomplete diagnosis: Antibiotics used for viral infections where they don't work
Rural healthcare gaps: Limited access to proper medical advice
Antibiotics in Animal Farming
Science And Technology livestock farming antibiotics
Livestock Antibiotics: Growth Promotion vs Resistance Risk
Growth promoters: Antibiotics fed to healthy animals to increase weight gain
Prophylactic use: Preventing disease in crowded farming conditions
Resistant bacteria spread from animals to humans via food chain
In livestock farming, antibiotics serve two main purposes: growth promotion (making animals gain weight faster) and disease prevention in crowded conditions. Both create resistant bacteria in animals that can transfer to humans.
Livestock Antibiotic Use vs Human Health Risk
Use Type | Purpose | How MDR Spreads to Humans | Regulation Status |
|---|---|---|---|
Growth promotion | Faster weight gain, better feed conversion | Resistant bacteria in meat, milk products | Banned in EU, restricted in India |
Disease prevention | Mass treatment in crowded farms | Environmental spread through farm runoff | Allowed with veterinary prescription |
Therapeutic use | Treating sick animals | Lower risk if withdrawal periods followed | Regulated withdrawal periods before slaughter |
Transmission Pathways
Direct consumption: Resistant bacteria in undercooked meat, unpasteurized milk
Environmental spread: Farm runoff contaminates water sources with resistant bacteria
Cross-contamination: Food processing facilities spread resistant bacteria across products
Occupational exposure: Farm workers and veterinarians at higher risk
MDR Prevention & Control
Science And Technology
Preventing Multi-Drug Resistance: Global & India Strategies
Antibiotic stewardship: Right drug, right dose, right duration
Infection prevention: Hygiene reduces need for antibiotics
India's National Action Plan addresses human + animal antibiotic use
WHO One Health Approach
# MDR Prevention
## Human Health
- Prescription controls
- Diagnostic testing
- Patient education
- Hospital infection control
## Animal Health
- Veterinary oversight
- Growth promoter bans
- Alternative farming methods
- Surveillance systems
## Environment
- Pharmaceutical waste management
- Farm runoff control
- Water treatment
- Resistance monitoring
## Research & Development
- New antibiotics
- Rapid diagnostics
- Vaccines
- Alternative therapiesIndia's National Action Plan (NAP-AMR)
Prescription-only medicines: Stricter controls on antibiotic sales
Red Line Campaign: Public awareness about antibiotic misuse
Surveillance networks: Monitoring resistance patterns in hospitals
Veterinary regulations: Controlling antibiotic use in food animals