Nubian Sandstone outcrops north of Khartoum State are arenaceous with fossils and horizontal, while in central and south are ferruginous, argillaceous, dipping in different directions, with tension joints and no fossils. ...

The Dental clinic workers (DCWs) in Yemen have an additional risk of getting infected with hepatitis C virus (HCV) from their work place and till now there is no study in prevalence of HCV infection and associated risk ...