Experimental infection in mice with Erwinia persicina

Area of Science:

• Microbiology
• Pathogen Research
• Immunology

Background:

• Erwinia persicinus (E. persicina) is a plant pathogenic bacterium.
• Previous isolation from human infection suggests potential zoonotic risk.
• Lack of established experimental models for E. persicina infection in mammals.

Purpose of the Study:

• To develop an experimental infection protocol for E. persicina in mice.
• To investigate the pathological effects of E. persicina infection in a mammalian model.
• To assess the impact of immunosuppression on E. persicina pathogenesis.

Main Methods:

• Seventy-two mice were divided into four groups: control, E. persicina infected, cyclophosphamide-immunosuppressed, and immunosuppressed plus E. persicina infected.
• Intraperitoneal injection of E. persicina (1 × 10^13 cfu/mL).
• Clinical signs, mortality, gross pathology, histopathology, and cytokine analysis (TNF-α, IL-1β) were assessed.

Main Results:

• Clinical signs (diarrhea, apathy, mortality) and pathological lesions were observed in E. persicina-infected groups (G2 and G4).
• Necropsies revealed lesions in the intestine, liver, kidney, and lungs, with hepatic necrosis and inflammation.
• Immunosuppressed and infected mice (G4) showed significantly elevated pro-inflammatory cytokines (TNF-α, IL-1β) in liver tissue.

Conclusions:

• Erwinia persicinus can induce pathological lesions in mammalian tissues.
• Immunosuppression exacerbates E. persicinus-induced pathology.
• E. persicinus is an emerging bacterium with potential pathogenic capacity in mammals, requiring further investigation.