Search PubMed⌕ Search

Biomedical subjects

N Knezević

Publications and source records attributed to N Knezević.

4 recordsLinked to original sources
PubMed2004

From testicular biopsy to human embryo.

The aim of the study was to investigate the role of a testicular biopsy in the diagnosis and therapy of infertile men with a non-obstructive azoospermia. Overall, 70 testicular biopsies from infertile men were analysed. Samples were obtained by the "open testicular biopsy" method. After dissection, several pieces of the tissue were immediately immersed into the Sperm Prep Medium (Medi-Cult) and fixative (5.5% buffered glutaraldehyde). Tissue samples transported in Sperm Prep Medium were plunged into Sperm Freezing Medium (Medi-Cult) and were stored in liquid nitrogen for potential in vitro fertilization procedures. The tissue was also processed for semithin sections and transmission electron microscopy. Semithin sections from 8 infertile patients demonstrated regular testis structure and fully preserved spermatogenesis (control biopsies). In the remaining 62 cases, spermatogenesis was impaired and a variety of pathological changes could be seen: disorganization and desquamation of spermatogenic cells, spermatid or spermatocyte "stop", spermatogonia only, "Sertoli cells only" or tubular fibrosis. However, in 65% of cases (despite the above mentioned changes of seminiferous epithelium) foci of preserved spermatogenesis could be detected. These cases were classified as "mixed atrophy" of seminiferous tubules. In 63% of infertile patients, a successful extraction of sperm from the biopsy could be performed. In azoospermic patients, histological analysis of testicular biopsy proved to be very useful in terms of diagnosis as well as therapy, i.e. for further in vitro fertilization procedures.

Biopsy↗
PubMed1998

[Rabies in dogs and efficacy of active immunoprophylaxis in Yugoslavia].

In this study we analyzed 36 cases of dog rabies diagnosed at the Pasteur Institute in Novi Sad during the last 10 years as well as the quality of postvaccination immunity. Most dogs had the paralytic form, more common in sylvatic rabies than furious clinical picture. 11% of dogs were aggressive, whereas 44% had injured humans, including their owners. Postvaccination immunity was examined in a group of dogs vaccinated with three domestic and one vaccine imported from abroad. Vaccination was successful in more than 70% of dogs and it is a sufficient percentage of seroconversion in dog rabies eradication. However, in dogs vaccinated only once during lifetime, the immunity was not satisfactory. That is why in primary vaccination of dogs compulsory revaccination 30 days after the first vaccine dose is suggested.

Animals↗
PubMed1997

Prognostic parameters in low-grade non-Hodgkin's lymphomas.

In a group of 73 patients with low-grade non-Hodgkin's lymphomas (LG NHL) a multivariate analysis of the following variables was performed: pathological types following the International Working Formulation, clinical stage, B-symptoms, erythrocyte sedimentation rate, hemoglobin level, white blood cell and lymphocyte count, serum gamma globulin level, serum total lactic dehydrogenase (LDH) level, mitotic and complete remission. The patients with lymphocytic lymphoma manifested the best survival in this group. Low-proliferative lymphomas showed better survival than high-proliferative lymphomas at 3 and 10 years. B-symptoms, serum total LDH level and complete remission were significant independent prognostic factors.

Adult↗