Volume 2004 Table of Contents 1-Hepatitis C Virus and GBV-C Co-Infection in High Risk Egyptian Population. Howayda M Hassoba, Abdel-Hamid Serwah and Teresa L Wright. 2-VP4 and VP7 Genotyping of Human Rotavirus: Relationship between Genetic Variation and Severity of Infantile Gastroenteritis. Nagwa M Shawky, Nana A Mohamed, Maged Bahagt and Eman M El- Moghazy. 3-Detection of Chlamydia pneumoniae DNA in Cholesteatoma Tissue by Polymerase Chain Reaction. Nehal Mohamed Fahim, Faten Mostafa Ali and Yasser Fawzy ElBeltagy. 4-Serum Vascular Endothelial Growth Factor in Childhood Hematological Malignancies. Laila M Sherief and Ahmad Gab-Alla. 5-Phenotypic and Genotypic Study of Extended Spectrum β-Lactamase Producing Isolates in Nosocomial urinary Tract Infection. Nagwa M Shawky and Nana A Mohamed.