Physiology, pathogenicity and immunogenicity of lon and/or cpxR deleted mutants of Salmonella Gallinarum as vaccine candidates for fowl typhoid | Veterinary Research, a journal on Animal Infection

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Volume 41 / No 5 (September–October 2010)

Vet. Res., 41 5 (2010) 59

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Table II.

Chicken LD₅₀ for the wild type and mutant strains.

Strain	LD₅₀ (cfu)
JOL394	3.0 × 10⁷
JOL914	2.3 × 10⁸
JOL915	2.1 × 10⁸
JOL916	> 2.8 × 10¹⁰