Characterization of intestinal mononuclear phagocyte subsets in young ruminants at homeostasis and during infection.

Introduction: Cryptosporidiosis is a poorly controlled zoonosis caused by an intestinal parasite, , with a high prevalence in livestock (cattle, sheep, and goats). Young animals are particularly susceptible to this infection due to the immaturity of their intestinal immune system. In a neonatal mouse model, we previously demonstrated the importance of the innate immunity and particularly of type 1 conventional dendritic cells (cDC1) among mononuclear phagocytes (MPs) in controlling the acute phase of infection.

Microbiota promotes recruitment and pro-inflammatory response of caecal macrophages during E. tenella infection.

Background: Eimeria genus belongs to the apicomplexan parasite phylum and is responsible for coccidiosis, an intestinal disease with a major economic impact on poultry production. Eimeria tenella is one of the most virulent species in chickens. In a previous study, we showed a negative impact of caecal microbiota on the physiopathology of this infection.

The caecal microbiota promotes the acute inflammatory response and the loss of the intestinal barrier integrity during severe infection.

Introduction: Coccidiosis, a disease caused by intestinal apicomplexan parasites , is a threat to poultry production. is one of the most pathogenic species, frequently causing a high prevalence of opportunistic infections.

Objective: The objective of this study is to investigate the role of the microbiota in the pathogenesis of severe infection.