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Table 1 Clinical profile and biological characterization of the Japanese field strains

From: Molecular epidemiology of Newcastle disease virus isolates from vaccinated commercial poultry farms in non-epidemic areas of Japan

NDV isolate

Host (Approximate age)

Region of origin

Year isolated

Clinical profile of affected flocks

ICPI

MDT

Genotype

JP/Osaka/2440/69

Layer chickens (80d)

Osaka

1969

Mortality of 60-70%; no detailed history; sample received for diagnosis;

1.8

56Ā h

VIa

JP/Ibaraki/SM87/87

Layer chicken (180d)

Ibaraki

1987

Mortality less than 3%; 25% drop in egg production; gasping and mild respiratory signs

1.7

56Ā h

VId

JP/Ibaraki/SG106/99

Layer chicken (700d)

Ibaraki

1999

No detailed history; sample received for diagnosis; necropsy lesions were proventriculitis, petechiae in duodenum and lymphocytic tissues

1.7

48Ā h

VIId

JP/Chiba/BY103/01

Layer chicken (96d)

Chiba

2001

Mortality around 10%, nervous signs, gasping, leg weakness; twisted neck

1.8

48Ā h

VIId

JP/Chiba/BY7/02

Layer chicken (110d)

Chiba

2002

Mild respiratory signs; gasping, swollen face, 20% drop in egg production; no significant mortality

1.7

56Ā h

VIId

JP/Ibaraki/IS5/02

Layer chicken (336d)

Ibaraki

2002

Mild respiratory signs; gasping, seven percent decrease in egg production; no significant mortality

1.8

48Ā h

VIId

JP/Ibaraki/IS2/02

Layer chicken (14d)

Ibaraki

2002

Severe depression

1.9

48Ā h

VIId

JP/Fukushima/NYF3/02

Layer chicken (532d)

Fukushima

2002

Mild respiratory signs; gasping, soft-shelled eggs; eight percent decrease in egg production; no significant mortality

1.8

48Ā h

VIId

JP/Miyagi/AGT/02

Layer chicken (250d)

Miyagi

2002

Mild respiratory signs, gasping; greenish diarrhea; 70% decrease in egg production; no significant mortalities

1.8

48Ā h

VIId