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Table 1 Monthly isolations of NDVs from cloacal swabs of multiple avian species at live bird markets for wholesale in Eastern China during May 2008 to April 2012

From: Surveillance of avirulent Newcastle disease viruses at live bird markets in Eastern China during 2008–2012 reveals a new sub-genotype of class I virus

Year Positive/sample Total Isolation rate (%)
Jan Feb Mar Apr May June July Aug Sep Oct Nov Dec
2008 - - - - 4/200 8/180 1/90 1/100 10/200 0/100 4/100 4/130 32/1100 2.91
2009 8/200 8/180 5/100 5/140 1/100 5/130 0/130 1/160 2/130 7/200 4/110 5/120 51/1700 3.00
2010 9/160 7/150 11/180 5/140 1/100 5/130 0/140 1/140 2/180 7/190 4/150 5/140 57/1800 3.16
2011 11/180 5/160 8/180 7/140 5/100 2/130 0/150 0/130 4/150 5/160 2/175 7/145 56/1800 3.11
2012 15/200 13/180 10/150 10/176 - - - - - - - - 40/706 5.67
total 43/740 33/670 34/610 27/596 11/500 20/570 1/510 3/530 18/660 19/650 14/535 21/535   
Isolation Rate (%) 5.81 4.93 5.57 4.53 2.20 3.51 0.200 0.57 2.73 2.92 2.62 3.93   3.32