Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Heart sections of chickens infected via air sac inoculation with virulent wild-type strains or iron acquisition mutants. Magnification,×400. Heart sections of chickens infected with E058 (A), E058ΔchuT (B), E058ΔiroD (C), E058ΔiucD (D), E058ΔchuTΔiroDΔiucD (E), U17 (F), U17ΔchuT (G), U17ΔiroD (H), U17ΔiucD (I), U17ΔchuTΔiroDΔiucD (J). Heart section of a mock bird (K).
