Prevention and Control of Zoonoses

One Health & Principles - Zoonoses United

• Zoonoses: Diseases/infections naturally transmitted between vertebrate animals and humans.
• Prevention & Control Principles:
  • Source Reduction: Control/eliminate pathogens in animal reservoirs (e.g., culling, animal vaccination).
  • Breaking Transmission: Interrupt pathways (e.g., vector control, food safety, hygiene).
  • Protecting Susceptible Hosts: Vaccination, chemoprophylaxis, health education for humans.
• One Health Triad: Interconnected health of Humans, Animals, Environment. Key for zoonoses.
• Intersectoral Coordination: Vital collaboration: medical, veterinary, public health, environmental agencies for surveillance & response.

⭐ India's National One Health Programme for Prevention and Control of Zoonoses highlights this coordinated strategy.

Animal Reservoir Control - Critter Shield Up

• Animal Vaccination: Key defense.
  • Dogs: Mass anti-rabies vaccination.
  • Livestock: Anthrax, Brucellosis vaccines.
• Quarantine: Isolate infected/exposed animals.
• Culling/Slaughter: For highly contagious diseases (e.g., Avian Influenza).
• Vector Control: For JE, KFD.
  • Chemical (insecticides), Biological (Gambusia fish), Environmental (source reduction, e.g., draining water).
• Animal Husbandry & Hygiene: Biosecurity, clean housing, proper waste disposal.

⭐ Mass dog vaccination (>70% coverage) is the most cost-effective measure for human rabies prevention.

Human & Environmental Control - Safety Bubble

• Personal Protective Equipment (PPE):
  • Essential for high-risk occupations (vets, farmers, lab workers): gloves, masks, gowns, eye protection.
• Food Safety Practices:
  • Thorough cooking of meat/eggs; pasteurization of milk (e.g., Brucellosis, Listeriosis).
  • Hand hygiene: critical for preventing Salmonellosis, Taeniasis.
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• Safe Water & Sanitation:
  • Access to potable water; proper sewage & animal waste disposal.
• Environmental Decontamination:
  • Disinfection of contaminated sites (e.g., anthrax); vector control; safe animal carcass disposal.
• Human Vaccination:
  • Pre-exposure prophylaxis (PrEP) for Rabies (high-risk), Japanese Encephalitis, Yellow Fever.
• Post-Exposure Prophylaxis (PEP):
  • Immediate, thorough wound washing (soap & water for 15 minutes).
  • Specific PEP protocols, e.g., Rabies (RIG + vaccine).

⭐ Rabies: wound washing with soap and water for 15 minutes is a critical first step in PEP.

Surveillance & Outbreak Management - Disease Trackers

• Early Detection & Rapid Response: Paramount for effective control and limiting zoonotic disease spread.
• National Surveillance Programs:
  • Key example: India's Integrated Disease Surveillance Programme (IDSP) for early warnings.

  ⭐ Integrated Disease Surveillance Programme (IDSP) is key for early warning signals of outbreaks in India.

• Essential Systems:
  • Clear, standardized case definitions.
  • Prompt, mandatory case reporting and notification.
• Outbreak Investigation Steps:

• Laboratory Role: Crucial for accurate diagnosis, case confirmation, and ongoing pathogen surveillance.
• Global Cooperation & Regulations:
  • Adherence to International Health Regulations (IHR).
  • Partnerships: WHO, OIE (World Organisation for Animal Health), FAO.

High‑Yield Points - ⚡ Biggest Takeaways

• One Health approach: Essential for integrating human, animal, environmental health.
• Surveillance & Reporting: Critical for early detection (IDSP) and rapid response.
• Vaccination: Key for animals (rabies, FMD, brucellosis) & humans (rabies, JE).
• Vector Control: Crucial for KFD, JE, Scrub Typhus, CCHF.
• Safe Practices: Vital in animal husbandry, food processing (hygiene, pasteurization).
• Inter-sectoral Coordination: Health, veterinary, wildlife, environment sectors must collaborate.
• Post-Exposure Prophylaxis (PEP): Lifesaving for rabies, anthrax; plus Chemoprophylaxis_