الفهرس 
Acknowledgment
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Abstract
This work was performed to study microbiological features of H. pylori, clinical effects of H. pylori on the patients through different symptoms, H. pylori infection rates, preferable tests for diagnosis of H. pylori in patients, resistance rate of H. pylori to antibiotics, effect of some plant extracts on multidrug resistant strains, phytochemical components detection, factors affecting bioactivity of phytochemical component to H. pylori and comparison of efficiency of plant extracts with antibiotics. This study had centralized the following points: The clinical features were being diagnosed in two hundred and sixty patients in Sohag and Assiut University Hospitals and some medical laboratories (one hundred and thirty patients for each one): 51.6% patients with abdominal pain (or abdominal discomfort in relation to meals discomfort), 49.1% patients with nausea, and 43.9% patients with heartburn in Sohag University Hospital and some medical labs while 52.2% patients with nausea followed by 48.4% with abdominal pain and heart burn, in Assiut University Hospital and medical laboratories, so the abdominal pain and nausea the most common symptoms in the gastrointestinal disorders. The highest rate of gastrointestinal disorders with the abdominal pain, nausea and heartburn among the patients in the rural regions than in the urban regions. In the medical laboratories of Tema (13.8%, 13.8%, 8.5%), Thata (13.1%, 13.8%, 13.1%) and Al-maragha (16.9%, 14.6%, 13.8%), Sohag University Hospital (8.5%, 6.9%, 8.5%) to the abdominal pain, nausea and heartburn respectively. In the medical laboratories of.