aPrograma de Pós-graduação em Ecologia, Laboratório de Ornitologia, Departamento de Biologia, Universidade Federal Rural de Pernambuco – UFRPE, Rua Dom Manuel de Medeiros, s/n, CEP 52171-900, Recife, PE, Brazil bGrupo de Observadores de Aves do Sertão Central, Rua Galdêncio do Nascimento, 17, Parque Bandeirante, CEP 56308-190, Petrolina, PE, Brazil cLaboratório de Ornitologia, Departamento de B...

ion. Submitted for publication, Sept. 1998. Available at http://www.csl.sri.com/ ̃singermn/ integration.html.[8] H. Saı̈di and S. Graf. Construction of abstract state graphs with PVS. In O. Grumberg, editor, Computer-Aided Verification, CAV ’97, volume 1254 of Lecture Notes in Computer Science, pages 72–83, Haifa, Israel, June 1997. Springer-

Infection of poultry with chicken anemia virus (CAV) is implicated in several field problems in broiler flocks due to the immunosuppression generated and, consequently, the increased susceptibility to secondary infections. Recently, we have reported an increased occurrence of clinical cases caused by CAV strains distantly related to those commonly used for vaccination. In order to understand th...

The interaction in the chick gut between Streptococcus faecium and its phage was examined. In conventional chicks, large numbers of S. faecium and phage were found in the cecum and smaller numbers were found in the anterior gut. In gnotobiotic chicks associated with S. faecium SY1 and its phage, there was no marked effect on bacterial numbers, but resistance to the phage rapidly developed. Depr...

A characteristic process of terminal erythroid differentiation is the degradation of ribosomal RNA into mononucleotides. The pyrimidine mononucleotides can be dephosphorylated by pyrimidine 5'-nucleotidase (P5N-I). In humans, a lack of this enzyme causes hemolytic anemia with ribosomal structures and trinucleotides retained in the red blood cells (RBCs). Although the protein/nucleotide sequence...

Extensive use of antibiotic growth promoters (AGPs) in food animals has been questioned due to the globally increasing problem of antibiotic resistance. For the poultry industry, digestive health management following AGP withdrawal in Europe has been a challenge, especially the control of necrotic enteritis. Much research work has focused on gut health in commercial broiler chicken husbandry. U...