Zorka Nikolova

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The aim of the recent survey is to investigate the dynamics of female sex organs malignancies (carcinoma of the uterine corpus, cervical carcinoma and ovarial carcinoma) incidence and to make a structural analysis. The incidence of female sex organs malignancies increases every other year from 37.7 cases in 1986 to 58.64 cases per 100,000 women in 1996. The(More)
The purpose of the present study was to evaluate the increase of colorectal carcinoma incidence in three regions of South Bulgaria (a total population of 1,269,464 persons) over a 14-year period (1985-1998). The data about the incidence rate are retrieved from the oncological hospital records of the patients and Bulgarian National Oncological Register. The(More)
University Clinic of Anesthesiology, Reanimation and Intensive Care, KARIL, Faculty of Medicine, Ss Cyril and Methodius University of Skopje, Republic of Macedonia; University Clinic for Digestive Surgery, Faculty of Medicine, Ss Cyril and Methodius University of Skopje, Republic of Macedonia; ACIBADEM-Sistina, Anesthesiology, Skopje, Republic of Macedonia;(More)
The present study concerns the incidence rate of colorectal cancer (CRC) in Plovdiv region (population 1,269,464). The study was carried out over a 12-year period and aimed at establishing the increase rate of this disease. Results show that incidence rate of CRC increased progressively for the mentioned period from 22.14 to 34.98 per 100,000 people and was(More)
Influenza A (H3N2) virus strains isolated in 1968-1980 in the USSR (1908 strains), PRB (1413 strains) and in other countries were studied comparatively. Among 15 drift variants described in the literature only 6 were found to have sequential epidemic spread. In all the instances the epidemics occurred after importation of the virus from abroad, the interval(More)
The National Influenza Center of Bulgaria made the epidemiological analysis of the spread of influenza virus, type A, for the period of 11 years on the basis of mass laboratory investigations. Subtype A (H1N1) was found to be the main factor of epidemics in 1978 and 1982, while the epidemics of 1980, 1983, 1985, 1986, 1987 and 1988 were mainly caused by(More)
Influenza A viruses (H1N1 serovariant) antigenically related to swine influenza viruses were isolated in March, 1982, from two sick adolescents in a rural area of Bulgaria who had had contacts with each other and with animals. The isolates, A/PRB/120/82 and A/PRB/121/82, were found to have hemagglutinin containing antigenic regions typical of hemagglutinin(More)