Engineered Lactobacillus casei targets the IgT-pIgR axis to confer mucosal protection against Aeromonas veronii in snakehead (Channa argus). - Gao KP; Dou JR; Ma BB; Ma TB; Li N; Qian AD; Shan XF; Sun WW; Zhang L; Zhang D; Wang CF; Zhang DX (Frontiers in immunology, 2026)