GDS Creuse – Wildlife health monitoring in Creuse

The DDETSPP23, DDT23, LDA d’Ajain, GDS Creuse and Fédération Départementale des Chasseurs de la Creuse working groups continue to monitor during the 2021/2022 season, with hunters collecting biological material from animals taken during the 2021/2022 season. hunting process. A big thank you to this hunter-sampler network. The three-year follow-up (tuberculosis in stag, brucellosis in wild boar) was repeated at the regional level for deer (tuberculosis), health news (Aujeszky in wild boar) and legal obligations ( filariasis in wild boar) has focused on research. For trichina, again, all 45 results were negative.

Wildlife TB surveillance with the SAGIR and SYLVATUB networks…

The epidemiological situation of bovine tuberculosis in France shows a very low infection rate on farms, but with a high rate of cases in New Aquitaine (70 out of 99 national outbreaks). In epidemic areas, wild animals can become infected. To identify the infection of wild animals as soon as possible, a surveillance network (Sylvatub) was established. The degree of faculty depends on the risk of this disease. Level 3 is applicable in departments where the prevalence is relatively high and where there is a need to better define the endemicity of wildlife diseases. Level 2 is applied according to the following factors: recent detection of wild bovine TB cases, detection of frequent bovine outbreaks or an increase in incidence, or proximity to the area is classified as level 3. Level 1 is allocated to other departments. including Creuse.

… Additional actions in Creuse…

Due to the unique tuberculosis situation in our region and the susceptibility of Creuse livestock to mainly free-range livestock, the choice was made to establish specific surveillance as part of the follow-up process. three years. During the 2021/2022 campaign, samples were taken from 73 deer, all results were negative.

… And on the level of Massif Central

With the desire to establish health monitoring, the Cerf Observatory of Massif Central (OCMC) drew inspiration from the Creuse plan. Film screenings were set up in Cantal, Corrèze, Creuse, Haute-Loire and Lozère, as well as for two partner divisions, Aveyron and Tarn. For this campaign, surveillance screening related to bovine tuberculosis. 41 samples were analyzed for Creuse, all results were negative.

Surveillance of swine brucellosis in wild boar

Long established in wild boar, the incidence of brucellosis in pigs is assessed every 3 years. The situation is stable, with positive rate about 50%. This is a reminder of the need for outdoor sheltered farms to implement all biosecurity measures and, in particular, to adhere to fences. Since the disease is an zoonotic disease, wild boar farmers must adhere to basic hygiene measures.

… And Aujeszky after the wild boar warning

Due to cases of Aujeszky disease on wild boar farms in Allier in 2020 and 2021, a farm in Corrèze in 2021, and infection of several hunting dogs, surveillance for this disease has been carried out in 2 campaigns. Pay special attention to the vicinity of outdoor sheltered farms and the eastern limit of the set. 39 samples were taken and there were no positive results.

A study of alveolar leukemia in foxes

This is a parasitic disease caused by a small tapeworm, Echinococcus multilocularis. Mainly foxes but also dogs and sometimes cats which parasitize themselves by consuming hamsters (intermediate hosts). The predators then excrete the very resistant “eggs” into the environment, which can stick their droppings on the soil, plants or their coats. Humans can then become accidental hosts, either through coming close to foxes or by direct contact with dogs, as well as consuming contaminated produce. A sample of 100 samples evenly distributed in the Creuse department was programmed. With a prevalence of 47% in 62 foxes, the first results confirm the presence of this parasite on our territory.

For 2022/2023, control trichinella, continue Aujeszky surveillance and SDRP survey in wild boar

The search for trichinella will continue because of legal obligations related to their consumption. With persistent warning of Aujeszky disease, surveillance will continue with 50 samples analyzed again, together with PRRS analysis to verify the absence of this disease in wild-type populations.

For stellar deer, monitor BVD
Deer are theoretically susceptible to BVD, and their serostatus is monitored every 3 years. To date all results have been negative, which confirms that wildlife is not a risk factor for livestock. For this campaign, 100 samples will be reanalyzed.

Evaluation of the level of parasite infection in deer

In recent years, we have observed relatively high parasite contamination in stellar deer, with the emergence of new bovine parasites apparently adapted to deer (e.g. ostertagia). This monitoring will also be extended to deer in Massif Central within the framework of the OCMC.
Faculty serum library, a tool for research

Since 2009, blood samples submitted to Ajain’s LDA are archived to allow for later retrieval if pathology studies are decided. To date, 1,198 samples have been preserved, of which 408 are from stellar deer, 359 from deer and 229 from wild boar.

Wildlife health monitoring, a useful tool for everyone

Wildlife health monitoring, carried out in Creuse since 1996, allows for the collection of data on the state of the game on zoonotic diseases and diseases common to wild species and in the country. It represents a potential warning tool for wildlife and human and animal health managers, so it will continue to be tailored to needs. For breeders, the only identified threat is brucellosis in pigs, which is highly prevalent in wild boar. Do not hesitate to contact us with any comments, suggestions or requests.

Dr. B. BOUBET (GDS Creuse) – S. QUINIO (FDC 23) – Dr. P. GILLI-DUNOYER (DDT) – Dr. ML. JEANDAUX (DDETSPP) – Dr. E. GUILLEMOT (LDA)

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