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To investigate the reticuloendotheliosis virus (REV) infection status in China, 2531 sera samples from 26 farms of native chickens were collected and tested for antibodies against reticuloendotheliosis virus. Serum samples analysis revealed 32.16% samples positive for REV-antibody. All 26 kinds of China native chicken strains have REV infection. REV-antibody positive rates of different flocks ranged from 1.01 to 67.68%. This study suggests that REV infection is very common in China native chickens flocks and more emphasis be given on its prevention.

The article offers information on a study which examines immune protection in dogs inoculated by canine distemper virus (CDV) DNA vaccine. It notes that CDV negative Beagle dogs that are 3 months old were injected in the muscle with plasmid DNA, while other 5 dogs were treated as negative control. It mentions that the experiments found out that DNA vaccines can eliminate virus in the body and protect dogs from CDV infection.

The article presents a study which compares and analyzes F and HN genes isolates and strain of Newcastle disease virus that were isolated from hatching eggs in China.