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Abstract
The study was a test to assess: ”Serological response to broiler bird flu vaccines common commercial and currently being used in Egypt, (Chinese H5N1 immunization - fortify Nobilaz avian H5N2). The study conducted on serum samples collected from fattening chicken came from mothers fattening immune to avian influenza previously. They were 100 in number, Rbua on the ground in the house closed in one place, (cycle breeding 42 to 47 days), 90 of whom were Mahsnyen by 0.5 ml subcutaneously in the back lower neck the vaccines business and the 10 remaining were not immunized along experience in order to monitor maternal antibodies derived from their mothers fortified. They immunized at age: 7 - 10 and 12 days and serum samples were collected 14 days after immunization. We used agglutination tests dolls & clumping blocker Dress to calculate units clumping dummies, HAUs for antigen test is required, in order to Nair pooled serum samples in the order and then we calculate the values of the G.MT. Results obtained from this study revealed that: maternal immune broiler That was the first high-to medium-5.9 at the age of 1 day, low at the age of 7 - 10 days 3.8 - 1.8 faint at the age of 12 days 1.1 and disappeared completely at 21 days of age 0. Use of a similar vaccine H5N1 gave immunity has always been the highest and best of different H5N2 vaccine at ages three immunization:} 7 {__} 10 {__} 12 {Day:} 4.8 - 4.9 - 5.9 and 6.5 {__} 5.9 - 6.1 - 6.4 and 7 {__} 6.8-7.1 - 7 and 7.8 {order using a similar test antigen and also was the highest and the best of different H5N2 vaccine using different test antigen also at age three immunization ::} 7 {__} 10 {__} 12 {Day . The percentages of Manaat garrison of avian flu collected from the use of the vaccine similar H5N1 were higher than those obtained from the vaccine is different H5N2 using antigen test similar when age immunization three:} 7 - 10 - 12 days {} 78.3 - 96.7 - 100% {for H5N1 compared to} 68.3 - 80 - 98.3% {H5N2. Also those percentages were higher for the same vaccine H5N1 different H5N2 vaccine using different test antigen:} 53.3 - 61.7 - 90% {for H5N1 compared} 35 - 46.7 - 75% {for H5N2. Similar use of test antigen always gave positive Manaat and percentages of Manaat garrison of bird flu, which has always been higher than the use of test antigen is different, (Results - Table 11 and Figure 10). The results also revealed that the best age for vaccination against bird flu for broilers is 12 days for the same vaccines different H5N1 and H5N2.