Why should we be concerned about leptospirosis in the workplace?
Leptospirosis is a potentially serious bacterial infectious diseasetransmitted from animals to humans through the environment.
It constitutes a recognized occupational risk for certain activities involving regular exposure to fresh water, wet soils or animals, particularly rodents.
While the disease is often mild, it can progress to severe formsresponsible for prolonged hospitalizations, after-effects and, in some cases, death.
Prevention, including risk assessment, protective measures and vaccinationis a key lever for protecting exposed workers.
Leptospirosis: a disease linked to the work environment
Leptospirosis is caused by bacteria of the genus leptospiraIncluding Leptospira icterohaemorrhagiae, frequently implicated in severe human forms.
rodentsRats, in particular, are the main reservoir. They excrete the bacteria in their urine, contaminating the fresh water, mud and wet soils.
Transmission occurs during a skin or mucous membrane contact with a contaminated environment, especially in the presence of micro-wounds, even invisible.
Disease is not contagious between humans.
Professions and situations at risk
The risk of leptospirosis is particularly relevant to activities involving frequent contact with damp or contaminated environments, including:
- Work in aquatic or wetland environments (maintenance of riverbanks, canals, rivers)
- Sewerswastewater treatment plants, sanitation networks
- Professional fishingFish farming, aquaculture
- Agriculture, livestock farming, forestry work
- Waste management, cleaning of unsanitary areas
- Post-interventions flooding
- Certain sporting or leisure activities practiced on a regular or professional basis
Possible consequences for workers' health
Leptospirosis often begins abruptly with a high fever, intense muscle painheadaches and extreme fatigue.
In approximately 5 to 10% of casesThe disease progresses to a severe form that can lead to:
- another kidney damagesometimes requiring dialysis
- another liver damage with jaundice
- des bleeding or severe respiratory distress
Mortality can reach 5 to 15% in severe cases, and lasting consequences are possible. These severe forms are more frequently associated with Leptospira icterohaemorrhagiae.
Vaccination: a prevention tool for at-risk professionals
Un human vaccine against leptospirosis is available in France.
It primarily protects against Leptospira icterohaemorrhagiae, responsible for a significant proportion of severe cases.
Vaccination recommendations in France
The vaccination is not systematicbut it can be offered on a case-by-case basis to people professionally exposed, after risk assessment by the occupational physician.
It is primarily aimed at workers:
- exposed repeatedly or for a prolonged period to potentially contaminated water or soil
- for which the protective measures do not completely eliminate the risk
Vaccination schedule
The diagram includes:
- 2 injections at 15-day intervals
- 1 reminder 4 to 6 months later
- then a reminder every 2 years if the exposure persists
Vaccination does not protect against all types of leptospires and must always be combined with collective and individual prevention measures.
Role of employers and occupational health services
Employers have a central role in preventing leptospirosis:
- assess occupational risk
- set up appropriate protective measures (equipment, procedures, hygiene)
- inform employees about the risks and warning signs
- direct exposed employees towards the occupational physician for an individual assessment and, if necessary, a vaccination proposal
Vaccination is part of a comprehensive prevention approach, on the same footing as training and collective protection.
To remember
✔ Leptospirosis is a preventable occupational disease
✔ Some activities expose you to a real and sometimes underestimated risk
✔ Vaccination can reduce the risk of severe forms of the disease in exposed workers
✔ It needs to be discussed case by case with the occupational physician
✔ Prevention means protecting employee health and business continuity
FAQ – Leptospirosis vaccination
(For HR and occupational health and safety (OHS) departments)
Leptospirosis is an infectious disease caused by bacteria (leptospira), transmitted through the environment. Rodents, particularly rats, are the main reservoir. Contamination occurs through contact with contaminated water or soil, especially in the presence of micro-wounds.
The risk notably concerns:
- the professions ofsanitation (sewers, wastewater treatment plants),
- the work in aquatic or wetland environments,
- la professional fishingFish farming,
- certain agricultural, forestry or cleaning activities,
- interventions after flooding.
Yes. One. human vaccine is available in FranceIt primarily protects against Leptospira icterohaemorrhagiae, a type of leptospira frequently implicated in the serious forms of the disease.
No.
The vaccination it's not mandatorybut it can be recommended on a case-by-case basis for exposed employees, after individual assessment by the occupational physician.
It can be offered to employees:
- exposed repeatedly or for a prolonged period to high-risk environments
- when the risk cannot be completely eliminated by protective measures,
- after information on the benefits and limitations of the vaccine.
The diagram includes:
- 2 injections at 15-day intervals,
- 1 reminder 4 to 6 months later,
- then a reminder every 2 years if the exposure persists.
No.
The vaccination does not protect against all types of leptospires and must always be associated with:
- at the port of personal protective equipment,
- hygiene (wound protection, hand washing),
- to collective prevention measures.
The employer must:
- evaluate the occupational risk,
- set up appropriate prevention measures,
- inform the employees,
- direct exposed employees towards the occupational health servicewho will decide on the appropriateness of vaccination.
Key points for HR and OHS
- Leptospirosis is a preventable occupational disease
- Vaccination is a complementary tool, target
- The vaccination decision falls under the purview of the occupational physician
- Effective prevention protects both the employee health and business continuity
