Recent reports of Salmonella outbreaks on poultry farms highlight the ongoing importance of strong biosecurity across the UK poultry sector. While often viewed through a food safety lens, Salmonella remains a persistent on-farm challenge with serious implications for flock health and productivity, as well as the wider public’s health.
Each year, around 10,000 people in the UK are affected by Salmonella infection. Although cases are commonly linked to contaminated food, the source often originates within livestock production systems, particularly poultry.
What is Salmonella?
Salmonella is a group of bacteria that can infect a range of animals, with poultry among the most commonly affected. The strains most frequently identified in poultry production are Salmonella Enteritidis and Salmonella Typhimurium. These are also responsible for salmonellosis in humans.
Once introduced into a flock, Salmonella can spread quickly and often without obvious early warning signs, making it difficult to detect and control without effective monitoring and biosecurity measures.
Impact on Poultry
Clinical signs in infected birds are often subtle and may only become apparent at flock level. When symptoms do present, they can include:
- Reduced appetite
- Weakness and lethargy
- Poor growth and uneven development
- Dehydration
- Watery diarrhoea
- Birds huddling around heat sources
- Drooping wings and closed eyes
Young birds are particularly vulnerable. In breeding and hatchery systems, infection can also result in reduced hatchability and increased chick mortality.
How Salmonella Spreads
Salmonella can spread by vertical transmission. Of note is where infected breeding birds pass Salmonella from themselves into their eggs and then subsequently to the hatching chick. If undetected on the breeding site it is likely that salmonella infected chicks can be placed on farms before the routine testing of chick transport paper is completed and the Salmonella is detected.
As well as the above direct route, Salmonella can also enter and spread through other routes within modern poultry production systems. These can include:
- Contaminated feed or water
- Direct or indirect contact with infected birds and vermin
- Environmental contamination via faecal shedding leading to contaminated surfaces and dust. (inadequate C&D)
- Movement of people, equipment, and vehicles between houses or sites
Human Health Risk
Salmonella is a significant foodborne pathogen in humans. Infection commonly occurs through:
- Consumption of undercooked or contaminated poultry meat or eggs
- Cross-contamination during food preparation
- Contact with infected animals or contaminated farm environments
Symptoms of salmonellosis typically develop within 12–72 hours and include diarrhoea, abdominal pain, vomiting, and fever. While most people recover within 4–7 days, young children, older adults, and those with weakened immune systems are at greater risk of complications.
The Importance of Biosecurity
Poor biosecurity remains one of the leading contributors to Salmonella outbreaks on poultry farms. Once established, the bacteria can be difficult to eliminate and may persist within the environment if not effectively managed.
Key control measures include:
- Preventing contact with wild birds and rodents
- Maintaining strict hygiene protocols for staff, equipment, and vehicles
- Effective cleaning and disinfection between production cycles
- Controlling feed and water hygiene risks
- Early identification and reporting of clinical signs
- Routine and robust testing of all flocks (particularly breeding birds.)
A robust biosecurity plan not only reduces the risk of Salmonella but also strengthens protection against other major disease threats such as avian influenza.
Protecting Flock Health and Business Continuity
Outbreaks of Salmonella can have significant operational and financial consequences, including reduced productivity, increased mortality, and disruption production cycles and supply chains.
Taking a proactive approach to disease prevention is essential to maintaining flock performance, welfare standards, and long-term business resilience.
Real-world cases demonstrate the scale of impact Salmonella can have on poultry businesses when biosecurity is not fully effective. Read our case study on how Livetec supported a poultry farmer affected by Salmonella and helped them manage and recover from an outbreak: Download Salmonella Case Study
How Livetec can help protect your flock
Livetec has been supporting poultry farmers in protecting their flocks for fifteen years. We provide expert advice on the biosecurity and contingency planning measures needed to significantly reduce the risk of disease, including Salmonella, entering your flock.
Our Biosecurity Advisory Service is designed to help you strengthen on-farm practices, reduce risk, and protect both animal health and business continuity.
Find out more about how Livetec’s Biosecurity Advisory Service can help protect your livestock and contact our team today: Book a call here
