The species of Acinetobacter generally are considered not-pathogenic in individuals considered for the medicine as healthful. However, diverse species persist in hospital environments and cause serious infections that threaten the life of patients compromised in reason of low the imunologia, that is, in face of its organic defenses to be susceptible the infections. The specter of the resistance to antibiotics of these organisms together with its capacities of survival become them a threat any type of hospital as he has been observed in occurrences even though in countries highly developed as the United States, for example. An important factor for its high pathogenic potential and with being able of infection is probably an efficient way of horizontal transference of genes, even so this type of action mechanism until the present moment has been only observed in the Acinetobacter baylyi, a species that lives in ground it was never associated with infections. In a work published for diverse doctors in the site with the heading ' ' Profile of Resistance of Acinetobacter Baumannii the Antimicrobialses in the Units of Intensive Therapy and Half-Intensive of the General Hospital of Fortaleza' ' in the year of 2008, in the referring part to the summary of the scientific article he was evidenced that the hospital infections are the most frequent complications of the medical treatment in the Units of Terapia Intensiva (UTI) and Half – Intensive (ITSELF). According to researchers, the bacteria of the Acinetobacter sort, especially Acinetobacter Baumannii, come in recent years gaining importance due to bigger participation in serious infections and to the selected resistance to antimicrobialses. In agreement still with them, the objective of the study was to verify the profile of resistance of cepas of Acinetobacter Baumannii, isolated of clinical samples of patients interned in the General Hospital of $fortaleza (HGF). The bacteria had been isolated in appropriate ways of culture. .