| The primary route of transmission is through the ingestion of placenta or allantoic fluids from an infected female. |
| Veterinarians are completing the study comparing allantoic and amniotic fluids and heart rates of fetuses in mares. |
| Repeated inoculation with allantoic fluid obtained from the first passage was carried out to determine pathogenicity. |
| As the allantois increases in size and importance, the allantoic vessels are correspondingly developed. |
| It unites with the common stem of the allantoic and vitelline veins in front of the liver. |
| The allantoic cavity persists, but the allantois only covers the placental area of the chorion. |
