Antimicrobials in poultry
Antimicrobial agents are essential tools for treating and controlling bacterial infections in poultry production. Veterinarians have a huge responsibility when using antimicrobials in poultry producing meat and eggs for human consumption. The term ‘judicious use’ of antimicrobials implies the optimal selection of drug, dose and duration of antimicrobial treatment, along with a reduction in inappropriate and excessive use as a means of slowing the emergence of antimicrobial resistance. The proper use of antimicrobials depends on the knowledge of interrelationships between bacteria, antimicrobial, host and consumer. The antimicrobial groups most commonly used in poultry are the betalactams, polypeptides, aminoglycosides and aminocyclitols, macrolides and lincosamides, florfenicol, tetracyclines, sulphonamides, quinolones and fluoroquinolones and ionophores.
1. Introduction Colibacillosis is one of the most common bacterial diseases in poultry farming. The infection can be localized, but more regularly it is systemic and leads to high mortality on farms [1,2]. The lesions in adult egg-laying hens most frequently include peritonitis, polyserositis, and salpingitis [3,4]. Whether the infection is primary or secondary, the outbreaks are managed by the application of antimicrobials through the drinking water [5]. The treatment is usually...
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The compound carvacrol has the potential to enhance immune function, thereby reducing disease impact (Liu et al., 2019). The bursa of Fabricius serves as primary immune organ responsible for B-cell development in chicks which may represent a promising target for in ovo delivery of carvacrol to modulate early bursal development. This study aimed to explore how carvacrol affects immune function in the bursa of broiler chicks around hatching. It was hypothesised that in ovo carvacrol delivery...
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January 25, 2027
United States - Georgia - Atlanta
I. INTRODUCTION Coccidiosis caused by unicellular protozoa from the genus Eimeria is one of the major veterinary challenges in the poultry industry, causing annual losses of more than $14 billion worldwide (Blake et al., 2020). Eimeria spp. need to invade intestinal epithelial cells to replicate. This leads to destruction of the intestinal epithelia, inflammation, reduced nutrient absorption and secondary infections such as nonspecific enteritis (also referred to as dysbacteriosis),...
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A multi study analysis was performed to compare the efficacy of salinomycin with narasin. The analysis was performed using data of 18 different anticoccidial sensitivity tests (ASTs) conducted over a 7-year period (2013-2019). The Eimeria isolates were collected in commercial farms from 13 different countries all using different coccidiosis control programmes. Sensitivity of Eimeria parasites to anticoccidial products can be assessed by performing AST trials (Cervantes & McDougald,...
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1. Introduction Nutritionists and informed consumers are concerned about food security, with this concern including the potential risks from consuming animal-based food products [1]. Food security has received much attention and has been a key concern of the Food and Agriculture Organization (FAO) of the United Nations. The FAO [2] definition of food security involves physical, social, and economic access to an adequate and safe supply of nutritious food to maintain an active...
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I. INTRODUCTION In the last century, human ingenuity led to the identification and then exploitation of antimicrobial agents. Their use has had huge impacts by helping in the control of bacterial diseases, improving health, and enhancing productivity in agriculture. Unfortunately, this monumental success has eroded over time, with exposure of the microbiome to antimicrobials having selected for survivors that are inherently resistant or that have developed or acquired mechanisms to...
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Author details: 1 Federal University of Santa Maria (UFSM), Veterinary Medicine Graduate Program, Master in Animal Health and Reproduction, Santa Maria, Brazil; 2 Federal University of Santa Maria (UFSM), Department of Animal Science, Santa Maria, RS 97105-900, Brazil; 3 Federal University of Santa Maria (UFSM), Center for Rural Sciences, Department of Preventive Veterinary Medicine, Laboratory of Diagnosis of Avian Pathologies, Santa Maria, Brazil; 4 Santa Catarina State...
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Introduction: Using low-dose antibiotics as feed additives can enhance poultry and swine performance. However, such practices have led to bacterial resistance and antibiotic residues in animal-derived foods. Consequently, there has been a shift towards finding replacements for antibiotics as growth promoters (AGPs). Among the various alternatives, organic acids have emerged as a significant option. Acidifiers have gained attention as viable alternatives to antibiotics in poultry...
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FIGAP 2026: The Scientific And Technological Exhibition Of The Livestock Industry
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Introduction Salmonella is a Gram-negative, facultative anaerobe ubiquitous in the gastrointestinal tract of several animal species, including poultry (Antunes et al., 2016). Several serovars of S. enterica pose a risk to human health, potentially resulting in gastroenteritis and death in rare cases when infection occurs (Antunes et al., 2016). Although biosecurity is important for commercial poultry operations, Salmonella can be introduced or freely move between barns or farms...
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Greg Mathis (Southern Poultry Research) discusses the use of ionophores and their efficacy in farms that had stopped using them for long periods, in this Engormix interview at IPPE 2026 in Atlanta. ...
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Infectious coryza (IC), caused by the bacterium Avibacterium paragallinarum (AP), has historically been a significant burden in tropical and subtropical regions. However, a recent and alarming shift in its geographical footprint has seen it re-emerge as a major threat in northern latitudes, including Europe and North America. In a comprehensive review authored by Mohamed El-Gazzar, Rodrigo Gallardo, Robert Bragg, and colleagues, published in Avian Diseases (DOI: ...
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Introduction Advancing our knowledge of animal nutrition has been a globally significant research field for approaching a century. The vast knowledge accumulated on how to meet the nutritional requirements of livestock has allowed researchers to evolve towards use of nutrition to achieve the wider aims of global food security. In parallel to the highly focused advances in animal nutrition, other researchers were grappling with the seemingly intractable conflict between globalized...
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Norel Makes History in Asia with the Opening of Its New Plant in Malaysia
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Antimicrobial resistance (AMR) in Escherichia coli is a major threat to global poultry production, particularly for controlling colibacillosis caused by avian pathogenic E. coli (APEC). Intensive antibiotic use has accelerated the emergence of multidrug-resistant (MDR) strains, undermining treatment efficacy and facilitating zoonotic transmission of resistance genes. This study evaluated bacteriophage therapy as a targeted, antibiotic-independent strategy to control MDR E. coli in Nepalese...
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1. Introduction Over the last few hundred years, humans have influenced the evolution of multiple animal species and different ecosystems involved in animal production [1]. This approach has led to the genetic change of domestic animals and has undoubtedly been driven by agriculture. The most important genetic changes in poultry production have occurred in the previous 60 years. Modern broiler chickens are likely the clearest example of these genetic improvements. Newborn chicks grow...
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Necrotic Enteritis in the Post-AGP Era: A Complex Multifactorial Challenge
The restriction on antibiotic growth promoters (AGPs) in the broiler industry has led to a significant resurgence of enteric diseases, particularly necrotic enteritis (NE). This complex disease, estimated to cost the global industry USD 6 billion annually, requires a deeper understanding to develop effective control strategies. A recent review by Shahna Fathima, Walid Ghazi Al Hakeem, Revathi...
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I. INTRODUCTION Contamination of eggshells by Salmonella Typhimurium is a major public health and food safety issue to the Australian poultry industry. In Australia, the majority of the egg and egg related foodborne outbreaks are caused by S. Typhimurium (The OzFoodNet Working group 2015). Biofilm formation is one of the survival mechanisms utilised by Salmonella spp. against physical and chemical stress factors in the environment (Steenackers et al. 2012). A biofilm is a...
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by Benjamin Geist
With just over 120 days until APSS 2026, planning for the 37th annual Australian Poultry Science Symposium is progressing smoothly. Next year’s event will return to the University of Sydney Business School – Belinda Hutchinson Building (H70) on the Camperdown Campus, and we’re excited to once again welcome delegates for 2.5 days of presentations, posters, networking, and industry engagement.
The theme for APSS 2026...
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Plant origin (phytogenic) feed additives (PFA), comprising herbs, spices, essential oils, plant extracts and derived products have gained considerable interest in view of the worldwide ban on use of antibiotic growth promoters (AGPs) in food animals. These products have the ability to improve performance by maintaining a healthy gut environment (Windisch et al., 2008). They have also been reported to influence carcass and meat quality characteristics in agricultural livestock (Isabel and...
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Fatty Acid Glycerides: Supporting Immunity and Animal Health
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1. Introduction Eggs and meat from poultry are indispensable protein sources in people's meals in Bangladesh [1]. However, the advancement in the poultry production is often interrupted by the overwhelming occurrence of infectious diseases in low resource settings of developing countries such as Bangladesh. Occurrence of these diseases, which incur a colossal loss due to less production of a quality product and also from the treatment cost, are attributable to noncompliance...
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Growth promoting effects of zinc bacitracin, Bacillus-based probiotics and a blend of Yucca and Quillaja saponin in broilers have been well documented (Engberg et al. 2000; Cheeke, 2009; Jeong and Kim, 2014). These in-feed additives are commonly used in broiler diets but their effects at different dietary crude protein (CP) concentrations remain unclear. This study was conducted to study the effect of these additives when added to low and high-protein diets on performance and caecal...
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