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Table 3 HA and infectivity titers of avirulent, thermostable ND-viruses at 56 °C for 0, 30, 60 min

From: Disparate thermostability profiles and HN gene domains of field isolates of Newcastle disease virus from live bird markets and waterfowl in Uganda

Virus

Parameter

Heat treatment time (minutes.) at 56 °C

0

30

60

NDV133/UG/MU/2011

aHA titer (log2)

26

26

26

bInfectivity titer

108.53

108.35

108.05

NDV173/UG/MU/2011

aHA titer (log2)

26

26

26

bInfectivity titer

108.4

108.25

107.7

NDV177/UG/MU/2011

aHA titer (log2)

26

26

26

bInfectivity titer

107.3

106.3

102.25

NDV178/UG/MU/2011

aHA titer (log2)

26

26

26

bInfectivity titer

107.8

106.45

106.2

I2 thermostable strain

aHA titer (log2)

211

210

210

bInfectivity titer

109.8

109.5

109.3

LaSota thermolabile

aHA titer (log2)

29

29

29

bInfectivity titer

109.6

–

–

  1. aHemagglutination assay (HA) titer presented as arithmetic mean HA log2 titer; and infectivity as log10
  2. b50 % embryonated egg infectious dose (EID50/ml)