Figure 4
From: Prevalence of a virus similar to human hepatitis B virus in swine
Viral particles in swine sera and hepatocytes revealed by electron microscopy. A: Electron micrographs of negatively stained SHBV particles from HBsAg positive serum. Two types of particles were observed which are similar in size (20 nm and 40 nm) and morphology, like complete and empty viral particles of SHBV. B: Virus-like particles in the nucleus of hepatocytes (liver sample from DX385).