Cholera in the UK and Bristol

Simon Berenyi • 12 June 2025

Cholera in the UK and Bristol

cholera rats kitchen

History, Current Status, and the Role of Rat Control in Disease Prevention

Cholera, a waterborne bacterial infection caused by Vibrio cholerae, has left a significant mark on the United Kingdom’s public health history, particularly during the 19th century. While it no longer poses a significant threat in the UK due to modern sanitation, its historical impact, especially in cities like Bristol, underscores the importance of maintaining robust public health measures.


This article explores cholera’s history in the UK and Bristol, its current status, and how rat control services, such as those provided by Pale Horse Pest Control in Bristol, contribute to reducing disease transmission risks.


It also offers five practical steps to minimise rodent-borne infections and guidance on seeking help for suspected infections, drawing on scientific sources and Health and Safety Executive (HSE) insights.


History of Cholera in the UK and Bristol

Cholera first struck the UK in 1831 during the second global pandemic, originating in India’s Ganges delta and spreading through trade routes to Europe. Known as “Asiatic cholera” to distinguish it from other gastrointestinal illnesses, it caused widespread fear due to its rapid onset and high mortality.


Major outbreaks occurred in 1831-1832, 1848-1849, 1853-1854, and 1866, with urban areas suffering the most due to poor sanitation and contaminated water supplies. In 1854 alone, 23,000 people died in the UK, highlighting the disease’s devastating impact.


In Bristol, cholera outbreaks were particularly severe. During the 1848-1849 epidemic, the city experienced relatively high mortality compared to other towns of similar size, as noted in historical analyses (PMC). This was largely due to Bristol’s inadequate water supply, described as the most deficient among English towns of comparable size in the 1844 Health of Towns report.


Contaminated water sources, often polluted by sewage, facilitated the spread of Vibrio cholerae, leading to significant loss of life. The work of public health pioneers like John Snow, who in 1854 traced a London outbreak to a contaminated water pump, spurred reforms that improved water and sanitation systems across the UK, including Bristol. By the late 19th century, these advancements, coupled with the Public Health Acts of 1848 and 1875, significantly reduced cholera’s prevalence (National Archives).


Current Status of Cholera in the UK

Today, cholera is extremely rare in the UK, including Bristol, due to robust water treatment and sanitation systems. The UK Health Security Agency (UKHSA) reports that cholera does not occur naturally in the UK, with cases primarily linked to travellers returning from endemic regions such as parts of Africa, Asia, and the Americas (GOV.UK).


In 2023, only 12 confirmed cases were reported across the EU/EEA, all associated with travel to cholera-affected areas (ECDC). The risk for UK residents is minimal, but travellers to high-risk areas are advised to practice good hygiene, avoid untreated water and undercooked food, and consider vaccination if visiting remote regions without medical access (NHS).


Aspect - Details - Current Prevalence

Rare, primarily travel-related cases


Risk Groups

Travellers to endemic areas, emergency workers


Prevention

Hygiene, safe water, and vaccination for high-risk travel


Health and Safety Executive (HSE) Guidance

The Health and Safety Executive (HSE), Britain’s national regulator for workplace health and safety, focuses on preventing work-related death, injury, and illness. While cholera is not typically an occupational disease in the UK due to its rarity, the HSE’s guidance on water-related hazards and biological agents is relevant.


Under the Control of Substances Hazardous to Health (COSHH) regulations, employers in high-risk sectors like waste management or water treatment must assess risks from biological agents, including waterborne pathogens.


The HSE emphasises maintaining hygiene standards, using protective equipment, and controlling environmental hazards like rodents, which can indirectly contribute to water contamination (HSE).


For cholera specifically, the UKHSA provides detailed public health guidance, recommending that workers in high-risk environments ensure clean water sources and practice rigorous hygiene.


Role of Rat Control in Disease Prevention

Although cholera is primarily waterborne, not directly rodent-borne, rats can contribute to environmental contamination by spreading pathogens through their faeces, potentially affecting water sources.


Rats are known carriers of diseases like leptospirosis, salmonellosis, and hantavirus, which can be transmitted via contact with their urine, faeces, or bites. By maintaining sanitation and controlling rat populations, the risk of such contamination is reduced, indirectly supporting efforts to prevent waterborne diseases like cholera.


Pale Horse Pest Control, a British Pest Control Association (BPCA)-accredited service in Bristol, plays a vital role in this effort. With nearly 20 years of experience, their team uses humane and effective methods to manage rat infestations.


They focus on identifying and sealing entry points, avoiding traditional baiting methods that can lead to recurring issues. Their services include comprehensive inspections and tailored pest management plans for homes and businesses, ensuring long-term prevention.


By reducing rat populations, Pale Horse Pest Control helps maintain sanitary conditions, minimising the risk of disease transmission. Contact them at Pale Horse Pest Control or call 0117 369 9909 for professional assistance.


Five Practical Steps to Reduce Rodent-Borne Infections

To minimise the risk of rodent-borne infections, individuals can adopt the following measures:


Maintain Cleanliness

Regularly clean food preparation areas and remove food debris to deter rats.


Secure Food Storage

Store food in rodent-proof containers and ensure garbage is securely contained and disposed of regularly.


Seal Entry Points

Inspect and seal gaps or holes in homes and buildings using materials like steel wool, wire mesh, or caulk.


Reduce Clutter

Clear indoor and outdoor clutter to eliminate hiding spots for rats, keeping yards and storage areas tidy.


Engage Professional Pest Control

Use services like Pale Horse Pest Control for regular inspections and effective rat management.

These steps, supported by scientific and HSE guidance, help reduce the risk of diseases transmitted by rodents. Learn more about their Bristol Rat Control services


Seeking Help for Suspected Infections

If you suspect cholera, characterised by severe diarrhoea, vomiting, and dehydration, seek medical attention immediately. Contact your general practitioner (GP) or call NHS 111 for advice.


In cases of severe dehydration or other complications, call 999 for emergency services. Inform healthcare providers of any recent travel to cholera-endemic areas to ensure accurate diagnosis and prompt treatment with antibiotics or rehydration therapy.


For rodent-borne diseases like leptospirosis, symptoms may include fever, muscle aches, or gastrointestinal issues.


Consult a healthcare professional, providing details of possible exposure to rats or contaminated environments. Early intervention is critical for effective treatment (NHS).


Summary

Cholera’s historical impact on the UK, particularly in Bristol, highlights the importance of sanitation and public health measures. While the disease is now rare in the UK due to advanced water treatment, maintaining vigilance through practices like rat control remains crucial for overall health.


Pale Horse Pest Control in Bristol supports these efforts by effectively managing rat populations, reducing the risk of environmental contamination. By following the outlined preventive steps and seeking prompt medical help when needed, individuals can protect themselves from cholera and rodent-borne infections, ensuring a safer living environment.

       

Key Citations:

  • Cholera as a ‘sanitary test’ of British cities, 1831–1866
  • Cholera: guidance, data and analysis
  • Cholera worldwide overview
  • Cholera information from NHS
  • Coping with Cholera - The National Archives
  • Case Study: Cholera - BBC Bitesize
  • Pest Control in Bristol | Pale Horse Pest Control
  • Health and Safety Executive - GOV.UK

 


Rats in Bristol and leptospirosis
by Simon Berenyi 12 June 2025
Leptospirosis: Understanding the Disease, Prevention, and Rat Control in Bristol
by Simon Berenyi 12 June 2025
Learn More About Clay Pipes and how they have been a cornerstone of the United Kingdom’s drainage infrastructure for centuries.
Hantavirus-infected mice
by Simon Berenyi 8 June 2025
Hantavirus in UK Rats and Mice Hantavirus: Prevalence, Transmission, Risks, and Pest Control Hantaviruses are a group of rodent-borne viruses that pose a public health concern due to their potential to cause serious illnesses in humans. In the UK, while human infections are rare, the presence of hantavirus, particularly Seoul virus (SEOV), in rat populations underscores the importance of effective pest control. Let's take a look at the prevalence of hantavirus in rats and mice in the UK, how it is transmitted, the risks it poses to humans and pets, and how pest control can mitigate these risks, drawing on scientific data and research. Prevalence of Hantavirus in UK Rodents Hantaviruses are carried by various rodent species, including rats and mice, with the Seoul virus (SEOV) being the primary strain in the UK, hosted by brown rats ( Rattus norvegicus ) and black rats ( Rattus rattus ). Research indicates varying prevalence across different rodent populations: Pet and Breeding Colonies: Studies show a high prevalence in pet rat populations, particularly in breeding colonies. For example, in private breeding colonies in Wales and South England, SEOV prevalence ranged from 33% to 100%, depending on the testing method (e.g., RNA PCR or serology) (Public Health England, 2016). Commercial rat farms and households with pet rats reported rates of 48–67%, likely due to close contact in enclosed spaces. Wild Rodents: Prevalence in wild rats varies by region. In Northern Ireland, 21.6% of brown rats and 28.8% of house mice ( Mus domesticus ) were seropositive for hantavirus (Patient.info, 2024). In Yorkshire, 50% of brown rats tested positive for SEOV, while in North-western England, no rats or mice tested positive for hantavirus RNA, though a novel Tatenale virus was found in 13% of field voles (Microtus agrestis) (Pounder et al., 2013). Other Rodents: Wood mice ( Apodemus sylvaticus ) showed low prevalence (0.03% in Northern Ireland), and bank voles ( Myodes glareolus ) had no detectable hantavirus in some studies. Puumala virus (PUUV), common in Europe, is not present in the UK, but a variant has been detected in rodent populations (Patient.info, 2024). Since 2012, 11 confirmed human cases of hantavirus infection have been reported in the UK, with nine linked to pet rats or rats bred for reptile feeding, indicating a higher risk in domestic settings (Public Health England, 2016). Transmission of Hantavirus Hantaviruses are primarily transmitted to humans through inhalation of aerosolised particles from rodent urine, droppings, or saliva. When these materials dry and are disturbed, such as during cleaning or sweeping, virus particles can become airborne and inhaled. Less commonly, transmission occurs through direct contact with infected rodents (e.g., handling pet rats) or bites, though bites are rare (GOV.UK). In homes with rodent infestations, the risk of exposure increases due to potential contamination of living spaces, particularly in areas like kitchens, attics, or basements where rodents are active. Risks to Humans and Pets Hantavirus infections in humans can cause hemorrhagic fever with renal syndrome (HFRS), characterised by fever, muscle pain, headaches, abdominal pain, and, in severe cases, kidney failure. While HFRS has a low fatality rate in the UK, severe cases may require hospitalisation (Patient.info, 2024). The psychological impact of infestations and health concerns can also be significant, causing stress and anxiety. Pets, such as cats and dogs, may be exposed to hantavirus by hunting or coming into contact with infected rodents. Although specific data on hantavirus in UK pets is limited, their exposure to rodent-borne pathogens like leptospirosis or Salmonella suggests a potential risk. Infected pets could theoretically spread contaminated materials, increasing household risks. Importance of Pest Control Pest control is critical in reducing hantavirus risks by eliminating rodent populations and preventing their access to homes. Effective strategies include: Exclusion: Sealing entry points, such as gaps in walls, doors, or pipes, to prevent rodents from entering. Sanitation: Removing food sources (e.g., unsecured garbage, pet food) and maintaining clean environments to deter rodents. Trapping and Removal: Using humane traps to capture and remove rodents, avoiding reliance on baits that may lead to dead rodents in inaccessible areas. Professional Services: For severe infestations, Pale Horse Pest Control ensures safe and thorough removal, often using integrated pest management techniques. Proper decontamination of infested areas, using disinfectants and ventilation, further reduces the risk of virus transmission. Mitigating Risks in Homes For households with rodent problems, the following steps can mitigate hantavirus risks: Avoid Direct Contact: Wear gloves and masks when cleaning areas with rodent droppings or urine to prevent inhalation or skin contact. Ventilate Spaces: Open windows and doors to disperse aerosolised particles before cleaning. Thorough Cleaning: Use disinfectants to clean contaminated surfaces and dispose of materials in sealed bags. Professional Help: Engage pest control experts for severe infestations to ensure complete rodent removal and decontamination. Educate Family: Inform household members about the risks of hantavirus and safe cleaning practices. Protect Pets: Keep pets away from areas infested with rodents and monitor them for signs of illness, ensuring regular veterinary check-ups. Summary Hantavirus, particularly SEOV, is present in UK rat populations, with higher prevalence in pet and breeding colonies than in wild rodents. Transmission through aerosolised rodent excreta poses risks to humans, causing HFRS, and potentially to pets through contact with infected rodents. Effective pest control, including exclusion, sanitation, and professional intervention, is essential to minimise these risks. By taking proactive measures, households can protect themselves, their families, and their pets from hantavirus and other rodent-borne diseases.
rats in the garden
by Simon Berenyi 21 May 2025
Learn how to prevent rats from nesting in your Bristol garden this spring. Expert tips from Pale Horse Pest Control on decking, food, and water management.
tree bumble bees in garden
by Simon Berenyi 19 May 2025
Discover safe ways to manage bumble bee nests in your Bristol or Bath garden. Learn expert tips from Pale Horse Pest Control for coexistence or professional help.
bristol wasp control
6 July 2024
Don't let wasps ruin your summer! Our Bristol wasp control services are fast, effective, and affordable. Trust Pale Horse Pest Control for safe and reliable wasp nest removal in Bristol - Book Now – 0117 369 2709
bristol wasp control
by Simon Berenyi 6 July 2024
Bristol Wasp Control – 0117 369 2709 Are Wasps Dangerous? Bristol Wasp Control is a necessity in many cases because wasps can be such a dangerous nuisance pest. Getting wasps controlled in your home or garden makes sense early in the year before the nests are large enough to put you or your loved ones [...]
house mouse capture
by The Pale Horse Pest Control Team 12 April 2023
Catching house mice and stopping house mouse infestations from causing damage to your property in Bristol and beyond.
simon berenyi new species Microparmarion sallehi
by Simon Berenyi 2 April 2023
Read about my fascinating discovery of a new species in Brunei - by local Bristol pest controller Simon. Learn about this unique find and why each discovery is so important.
Squirrel on a roof, preparing to leave the property after successful pest control measures
by The Pale Horse Pest Control Team 2 April 2023
When Do Baby Squirrels Leave The Nest? Discover effective grey squirrel pest control strategies to help you understand when squirrels leave your property and how to prevent them from returning. Keep your home squirrel-free with our expert advice.
More posts