Nevertheless,
Hepatitis a: why does virus:
When the Regional Health Agency (ARS) Auvergne-Rhône-Alpes made its hepatitis a: why does virus figures public. Therefore, concern has settled. For example, Between January 1. For example. In addition, July 31, 2025, 73 cases of hepatitis A were identified in the Rhône department, against only 16 cases over the same period in 2023 and 2024.
It is a vertiginous increase of +356 %. Therefore, And even more worrying: the majority of cases are concentrated in the 7ᵉ arrondissement of Lyon, according to BFM Lyon. In addition, The trend suddenly accelerated in early July, with 57 new cases in six weeks. For example, For comparison, the department sometimes had less than ten per year before.
Hepatitis A: Who is affected by this outbreak? – Hepatitis a: why does virus
This wave only affects adults, mainly under the age of 65. Therefore, To date, no child hepatitis a: why does virus has been infected.
This data is surprising. For example. because hepatitis A is often caught very early in life, in countries where the virus hepatitis a: why does virus circulates more. In France, where hygiene conditions largely limit propagation, the disease occurs more rarely. When it strikes adulthood, symptoms are generally more marked and fatigue can last for several weeks.
Hepatitis A: How to recognize the virus? – Hepatitis a: why does virus
How is hepatitis A transmitted?
The Hepatitis A (VHA) virus is tenacious and extremely contagious. Its transmission is feco-oral. that is to say that it involves ingestion of food, water or by contact with contaminated hands.
- Food: raw seafood, poorly cooked shells, poorly washed raw vegetables can be vectors.
- Hygiene: insufficient hand washing after a passage to the toilet promotes contamination.
- Communities: In dense neighborhoods, propagation can accelerate if hepatitis a: why does virus a first case is not quickly identified.
The virus is particularly resistant. It can survive several weeks in the environment, which explains why a flambé can quickly spread.
What are the symptoms hepatitis a: why does virus to monitor?
Hepatitis A is known for its sometimes misleading signs, resembling a flu at the start. But some symptoms should alert according to Inserm:
- fever. great fatigue. loss of appetite,
- nausea, abdominal pain, diarrhea,
- jaundice (yellowing of the skin and white of the eyes),
- dark urine, very clear stools.
The disease is most often benign and heals spontaneously in a few weeks. The serious forms are exceptional, but fatigue can be long to disappear.
Why the 7ᵉ arrondissement of Lyon?
This is one of the big questions that intrigue epidemiologists. why this outbreak seems concentrated in a single district of Lyon? For hepatitis a: why does virus the moment, no precise source of contamination has been identified. The authorities dismiss the hypothesis of a single food home (such as a restaurant. a caterer). explore several tracks:
- traffic in collective places,
- local eating habits,
- Or an introduction of the virus by travelers.
hepatitis a: why does virus
The surveys continue to reassemble the contamination chain.
What recommendations for health authorities?
1. Vaccination
ARS and doctors recall simple but effective measures such as vaccination. It is the safest weapon against hepatitis A. It is particularly recommended for:
- travelers to risk areas.
- Men with sex with men (HSH),
- People with chronic liver disease and those around them.
The vaccine scheme is done in two doses spaced 6 to 36 months apart. Immunity is then sustainable.
2. Hygiene gestures
- Wash your hands regularly. especially after hepatitis a: why does virus the toilet. before meals,
- Wash and cook sensitive foods well (raw vegetables, shells, seafood),
- Avoid potentially soiled waters.
3. Medical vigilance
Hepatitis A is a compulsory declaration disease. Any suspicion must be confirmed by serology and reported to the ARS. hepatitis a: why does virus This allows you to follow the evolution of the epidemic in real time.
Hepatitis A: Should we worry?
The current outbreak is spectacular but remains controllable.
- The cases are geographically concentrated.
- The disease rarely remains serious in France.
- Prevention tools exist and are effective.
The real fear of the authorities is that the virus continues to circulate at the start of the school year. a period conducive to gatherings and the resumption of collective activities. This is why they call for vigilance, without giving in to panic.
NAMELY
It is not hepatitis a: why does virus the first time that a flambé of hepatitis has surprised the French authorities. In 2014, in Hérault, a local epidemic had been traced to a bakery-pastry. An infected employee, without knowing it, had contaminated the products he manipulated. Result, 27 sick people, including 17 directly linked to hepatitis a: why does virus the establishment.
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