The extensive application of antibiotics in poultry production has resulted in the emergence of resistant bacteria, which pose a great threat to the health of birds and humans. In this review, the literature is searched using databases such as PubMed, Scopus, Web of Science, and Google Scholar. Studies concerning antimicrobial resistance in poultry, the One Health approach, and alternative strategies to antibiotics are included, while studies not in English, opinion-based papers, and studies not related to poultry or AMR are excluded. This review explores the increasing challenges of antibiotic resistance in poultry, emphasizing the One Health framework related to animal, human, and environmental health. The risks of zoonotic transmission from poultry, the mode of development of resistance, and alternative antibiotics (comprising probiotics, prebiotics, enzymes, and essential oils) are the key topics discussed. This review further touches on critical barriers in fighting antibiotic resistance, which include economic constraints, a lack of awareness, and coordination challenges. This study highlights regulatory and consumer-driven changes in antibiotic use. The poultry industry can reduce the use of antibiotics by adopting the One Health approach and implementing evidence-based alternatives that support productivity. However, sustainable solutions require further research, policy reforms, and collaboration across sectors.

The cardinal Physiology of Gut Health in monogastric animals such as swine and poultry is vital. It is critical for digestive efficiency, immune status, and production levels. This system is related not only to the digestion and absorption of nutrients from feed ingredients contributing to growth and feed utilization efficiency but also to having a strategic microbiota that supports immunity and pathogen resistance, as well as metabolic support. Gut disease, for example, bacterial, viral, or parasitic infection, diet, or stress, can reduce nutrient digestion and absorption. They can also suppress the immune system and render patients more prone to disease. These are efficiency degradations and increase veterinary and husbandry costs. In addition, nutrient absorption because of deteriorated gut health can affect the environment in different ways: removal of nutrients through leaching and the release of gases (including CH₄ and NH₄). These pressures have led to a focus on the gut in animal research to improve the welfare of animals and ensure sustainable practices in animal production. Recent studies have included the use of probiotics, prebiotics, and other feed additives to enhance the positive effects of the gut microbiota. These are also intervention points to increase nutrient absorption and animal well-being, in turn sustainability. Such approaches are expected to promote a stable microbial community with less dependence on the use of antibiotics, less waste generation, and less environmental impact from animal farming. This review provides a critical evaluation of the current literature on gut health in monogastric livestock, with pigs and poultry as the principal focus. We also considered the impact of gut health on production efficiency and Environmental sustainability. Current progress in nutritional modulation of gut health for increased productivity, enhanced animal welfare, and better profitability are presented. Gut-related biological mechanisms are linked to practical nutritional strategies, and subsequently to animal welfare, production efficiency, and environmental effects, offering a coherent concept for moving from mechanism to system-level sustainability.

Background: Antimicrobial resistance (AMR) has emerged as a global threat to global public health, requiring innovative strategies to address antibiotic-resistant bacterial pathogens. The synergy between plant extracts, essential oils, phytocompounds, and antibiotics promises to be a viable solution to this grave issue. Main body: In addition to the synergistic effects of plant extracts, essential oils, and phytocompounds, the current review described the main groups of phytochemicals that function as anti-bacterial agents. The mechanical and toxicological issues are also highlighted in the current review. Conclusion: The most popular techniques examined in this review are checkerboard and time-kill tests. The synergistic actions of plant extracts, phytocompounds, and essential oils effectively reduced the drug’s minimal inhibitory concentration against both standard and clinical bacterial isolates. Each of the three complementary strategies-plant extracts, phytocompounds, and essential oils-was equally significant.