[Acute gastroenteritis of viral etiology].

Retrospective analysis of own experiences and investigations concerning the role of the viral etiology in acute gastroenteritis were presented. Stools of children and soldiers with acute gastroenteritis were examined by electron microscopy. The most frequent causative agents were rotaviruses and much less frequently found were other viral particles of: coronaviruses, adenoviruses, Norwalk-like viruses, astroviruses, caliciviruses and "small round viruses".

[Neutralizing antibodies to Coxsackie virus group B 1986-1988].

Presence of neutralizing antibodies to Coxsackie B viruses (CBV) 1-5 were examined in 2885 human sera by the neutralization test. The most frequently detected antibodies were to B4 viruses (in 1495 sera--51.82%) and to B3 (1371--47.

[Detection of antibodies to cytomegaloviruses, herpes simplex viruses and varicella-zoster viruses in persons positive for human immunodeficiency virus antibodies].

Forty-seven anti-HIV positive sera and 47 sera of normal individuals were analyzed to the presence of IgG and IgM antibodies versus CMV, HSV and VZ. IgG antibodies in comparison to CMV were found in 27 cases (57.44%); in comparison to HSV in 40 (85.

[Analysis of herpes simplex virus DNA using restriction endonucleases].

DNA of herpes simplex virus was analysed by restriction endonucleases EcoRI, BgII and HindIII. By this method it is possible to differentiate type 1 and type 2 of viruses. DNA of herpes simplex virus was prepared according to the method of Kinnunen and his collaborators which is described in detail.