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.
HA and embryonated egg infectivity titer of vaccine strains after heat treatment at 56°C.
| Virus | Parameter | Heat treatment time |
||
|---|---|---|---|---|
| 0 min | 30 min | 60 min | ||
| NDV/rHR09 | HA titer (log2)a | 10 | 9 | 7 |
| Infectivity titer (log10)b | 8.5 | 4.2 | 2.2 | |
| V4 | HA titer | 10 | 10 | 10 |
| Infectivity titer | 9.5 | 8.2 | 6.8 | |
| La Sota | HA titer | 11 | 0 | 0 |
| Infectivity titer | 8.7 | 0 | 0 | |
Abbreviations: HA, hemagglutination assay; NDV, Newcastle disease virus.
50% embryonated egg infectious dose (EID50/0.2 mL).
