Hepatitis D, HDV is a subviral satellite that is not classified in a viral family. Dr. Mario Rizzeto identified in 1977 a nuclear antigen that was subsequently established to derive form what was named Hepatitis Delta Virus ()This is the only virus under the genus deltavirus (Hepatitis D Virus, 2005). The history of this interesting unique satellite small virus is short and therefore researches are still searching for possible new genotypes and prevention and treatment methods. The new satellite virus was established to depend entirely on the Hepatitis B Virus for its production and transmission. HDV depends on the Hepatitis B surface antigen provided by the HBV that the former uses to form its envelope of particles (Handa, Yamaguchi, 2006). Although HDV is considered as a satellite virus of HBV, it does not present the same sequence as the later and it its replication is not dependent on the HBV (Hepatitis D Virus, Classification).

The disease may be transmitted through infected blood and blood products, infected needles, through birth (from mother to new born) and through sexual relations, with increased risks of infection in male homosexual relations in males infected with HBV (World Health Organization, 2009; Stanford University Website, 2005).

The incubation period for the BDV lasts between 3 and 7 weeks. After this period, the symptoms of the disease are: nausea, lethargy, diarrhea, loss of appetite, and they are non-specific (Stanford Univ. website, 2005). The next phase will add dark urine and stool that has a light color, indicating that the liver is not able...

Some patients may not present these symptoms at all, although they were infected with the virus.
Generally, the symptoms in patients infected with the HDV are tending to be severe and they are more aggravated than in the case of infection with HBV alone. They also depend on the way the patient was infected: co-infection or super-infection. The symptoms in the later form of infection are the most severe. In the case of infection in the later form, the development of the disease leads to fulminant hepatitis and it can become life threatening. Both forms of the infection can lead to a chronic development of the disease, cirrhosis, leaver failure. Transplant is in life threatening stages the only method of treatment that may be successful in saving the patient's life.

The treatment for the disease is palliative since there are no effective treatments. The treatment with a-interferon has produced remissions, but the patients remained positive when tested subsequent to the treatment (WHO, 2009). There are no vaccines for the prevention of the disease caused by infection with Hepatitis D virus, but since it depends on the presence of the HBV and the infection with the later virus can be prevented through vaccination, the conclusion is that prevention is parallel to the protection against infection with HBV. But, once a patient was infected with HBV, there is no vaccine available for the prevention…