Antibiotic Resistance in Animals: A Growing Threat to Animal and Human Health
Dr. Rokade Prashant Prakash1, Dr. Pophale Krushnakant Subhash2, and Dr. Solapure Vaibhav Marotirao3, and Dr. Kodulkar Kshitij Shashikant3
1 (M.V. Sc Pathology), 2 (M.V. Sc Livestock Products Technology), 3 (M.V. Sc Poultry Science), 4 (M.V. Sc Veterinary Gynaecology and obstetrics)
Corresponding Author: Dr. Rokade Prashant Prakash*(rokadeprashant97@gmail.com)
Abstract
Antibiotic resistance has emerged as one of the greatest global challenges to animal health, food security, and public health. In animal husbandry, antibiotics are indicated for therapeutic, prophylactic, and growth promotion purposes. Indiscriminate and irrational use of these drugs has accelerated the development of antibiotic-resistant bacteria in animals. The resistant microorganisms can be transmitted to humans through direct contact, food of animal origin, and the environment, hence posing a grave public health risk. The present article discusses the concept of antibiotic resistance in animals, its causes, mechanisms, routes of transmission, impact on animal and human health, and strategies for prevention and control. Emphasis is given to the One Health approach, which integrates animal, human, and environmental health for effective combating of antimicrobial resistance. Rational use of antibiotics, improved farm biosecurity, vaccination, surveillance, and awareness among veterinarians and farmers are key measures to minimize the development and spread of antibiotic resistance. Addressing this issue is crucial for ensuring sustainable livestock production and safeguarding the effectiveness of antibiotics for future generations.
Keywords
Antibiotic resistance, Animals, Antimicrobials, One Health, Public health
Introduction
Antibiotics have played a vital role in controlling infectious diseases in animals and improving livestock productivity. However, the excessive and improper use of antibiotics in veterinary practice and animal production systems has led to the emergence of antibiotic-resistant bacteria (Guardabassi et al., 2018). Antibiotic resistance occurs when microorganisms develop the ability to survive or grow in the presence of drugs designed to kill them or inhibit their growth. This phenomenon is now recognized as a major threat to animal health, human health, and global food safety (WHO, 2019).
Use of Antibiotics in Animals
In animal husbandry, antibiotics are commonly used for:
- Treatment of bacterial infections
- Prevention of diseases (prophylactic use)
- Metaphylaxis in herd or flock management
Inappropriate use, incorrect dosage, and prolonged administration of antibiotics create selective pressure that favors the survival and multiplication of resistant bacteria (O’Neill, 2016).
Mechanisms of Antibiotic Resistance
Bacteria develop antibiotic resistance through several mechanisms, including:
- Enzymatic degradation or modification of antibiotics (e.g., beta-lactamase production)
- Alteration of target sites, reducing drug binding
- Efflux pumps that expel antibiotics from bacterial cells
- Reduced permeability of the bacterial cell wall
Resistance genes may spread rapidly among bacteria through horizontal gene transfer mechanisms such as conjugation, transformation, and transduction (Davies and Davies, 2010).
Transmission of Resistant Bacteria from Animals to Humans
Antibiotic-resistant bacteria originating in animals can be transmitted to humans through multiple routes:
- Consumption of contaminated meat, milk, and eggs
- Direct contact with infected or carrier animals
- Environmental contamination through animal waste, water, and soil
These pathways demonstrate the close interrelationship between animal and human health (Landers et al., 2012).
Impact on Animal and Human Health
In animals, antibiotic resistance leads to treatment failure, prolonged illness, increased mortality, and higher production losses (McEwen and Collignon, 2018). In humans, infections caused by resistant bacteria are difficult and costly to treat and may result in increased hospitalization and death (WHO, 2019).
Prevention and Control Strategies
Control of antibiotic resistance in animals requires integrated measures such as:
- Judicious use of antibiotics under veterinary prescription
- Implementation of good farming and biosecurity practices
- Regular vaccination programs to reduce disease incidence
- Monitoring and surveillance of antimicrobial use and resistance
- Education and training of farmers and animal health professionals
Reducing dependency on antibiotics is essential for sustainable animal production (FAO, 2020).
One Health Approach
The One Health approach emphasizes coordinated action across human, animal, and environmental health sectors. Addressing antibiotic resistance through this approach ensures comprehensive surveillance, responsible antimicrobial use, and effective policy implementation (CDC, 2017).
Conclusion
Antibiotic resistance in animals is a complex and escalating problem with serious implications for animal welfare, food safety, and public health. Misuse and overuse of antibiotics in livestock production significantly contribute to the emergence and dissemination of resistant bacteria. Adoption of rational antibiotic use practices, strengthening of preventive healthcare, and implementation of the One Health approach are critical steps in combating this global threat. Collective efforts from veterinarians, farmers, policymakers, and researchers are essential to preserve the effectiveness of antibiotics for future generations.
References
CDC. (2017). Antibiotic resistance threats in the United States. Centers for Disease Control and Prevention.
Davies, J. and Davies, D. (2010). Origins and evolution of antibiotic resistance. Microbiology and Molecular Biology Reviews. 74 (3): 417–433.
FAO. (2020). Antimicrobial resistance action plan. Food and Agriculture Organization of the United Nations.
Guardabassi, L., Jensen, L. B. and Kruse, H. (2018). Guide to antimicrobial use in animals. Blackwell Publishing.
Landers, T. F., Cohen, B., Wittum, T. E. and Larson, E. L. (2012). A review of antibiotic use in food animals: perspective, policy, and potential. Public Health Reports. 127 (1): 4–22.
McEwen, S. A. and Collignon, P. J. (2018). Antimicrobial resistance: a One Health perspective. Microbiology Spectrum. 6 (2): 1–26.
O’Neill, J. (2016). Tackling drug-resistant infections globally: final report and recommendations. Review on Antimicrobial Resistance.
WHO. (2019). Antimicrobial resistance. World Health Organization.
