LABÉO Academy - Lawsonia : la menace silencieuse en élevage

Value of the Information & Strength of the Argument

The webinar provides valuable, detailed information on Lawsonia intracellularis infections in horses, covering all relevant aspects from etiology to prevention. The argumentation is solid, based on scientific studies and the presenter’s expertise. The presentation is well-structured, with clear explanations of diagnostic methods and treatment protocols. The inclusion of seroprevalence data and experimental infection timelines enhances the credibility of the information. However, the webinar is primarily an expert opinion and does not include a systematic review of all available literature, but it does reference specific studies, which strengthens its value.

Scientific Rigor, Source Quality, Title Accuracy

The scientific rigor is high, with references to specific studies (e.g., Pusterla et al., 2010) and data from seroprevalence surveys. The quality of sources is good, as the presenter is from a specialized veterinary laboratory. The title accurately reflects the content, focusing on the ‘silent threat’ of Lawsonia in livestock. The webinar does not include any advertising or sponsorship segments. The content is consistent with current veterinary knowledge, and the presenter clearly distinguishes between established facts and areas of uncertainty.

The title accurately reflects the content, which focuses on Lawsonia intracellularis as a silent threat in livestock, particularly horses.

8/10

The webinar is presented by a specialized veterinary laboratory (LABÉO) and provides detailed, up-to-date information on Lawsonia intracellularis infections in horses, including epidemiology, clinical signs, diagnostic methods, treatment, and prevention. The content is consistent with current scientific knowledge and includes references to specific studies. However, it is a single expert presentation without peer review or external validation.

Markers derived by PSI from the transcript: the creator did not define chapters.

• 00:00Introduction to Lawsonia intracellularis and its impact on livestock.
• 02:00Epidemiology and transmission routes, including potential reservoirs.
• 05:00Clinical signs of equine proliferative enteropathy (EPE).
• 10:00Diagnostic methods: blood parameters, ultrasound, PCR, and serology.
• 15:00Seroprevalence studies and interpretation of serological results.
• 20:00Macroscopic and histological lesions, and immunohistochemistry.
• 25:00Treatment options and prognosis.
• 30:00Prevention strategies and recommendations.

• Pusterla et al., 2010 — Comparison of rectal swabs and fecal samples for PCR detection of Lawsonia intracellularis.
• Seroprevalence study in Brazil (2023) — Study on seroprevalence of Lawsonia intracellularis in Thoroughbred horses in southern Brazil.
• Seroprevalence study in Belgium (2020) — Study on seroprevalence in adult horses in Belgium.

• Pusterla et al., 2010 — Study on PCR detection methods.
• Seroprevalence study in Brazil (2023) — High seroprevalence in adult horses.

• Seroprevalence study in Belgium (2020) — The study reported nearly 100% seropositivity, which may be due to the ELISA used, raising questions about specificity.