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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 56 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 56 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 48 h VIId
JP/Chiba/BY103/01 Layer chicken (96d) Chiba 2001 Mortality around 10%, nervous signs, gasping, leg weakness; twisted neck 1.8 48 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 56 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 48 h VIId
JP/Ibaraki/IS2/02 Layer chicken (14d) Ibaraki 2002 Severe depression 1.9 48 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 48 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 48 h VIId