background: in patients who are hepatitis b virus (hbv) dna-positive, but hbv surface antigen (hbsag) -negative, the infection is referred to as occult hepatitis b infection (obi). occult hbv infection is harmful when other liver diseases are present, and can aggravate liver damage in in patients with chronic liver diseases. in human immunodeficiency virus (hiv) infection the suppression of vir...

In order to increase the post-vaccination immune response during vaccination of calves against salmonellosis, a test was carried out with an inactivated emulsified vaccine background use probiotic Profort. The studies were on basis large livestock farm in Voronezh region, unfavorable for salmonellosis calves. Epizootological, clinical, immunological, hematological, molecular genetic research me...

Methods to measure T antigen-forming capacities of simian virus 40 (SV40) and adenovirus 12 (Ad12) were investigated, and a method to measure the capacity in terms of T antigen-forming units was employed by the use of cytosine arabinoside. Plaque-forming units and T antigen-forming units of SV40, SV40 deoxyribonucleic acid, or Ad12 were inactivated by ultraviolet (UV) irradiation at the same ra...

Methods to measure T antigen-forming capacities of simian virus 40 (SV40) and adenovirus 12 (Adl2) were investigated, and a method to measure the capacity in terms of T antigen-forming units was employed by the use of cytosine arabinoside. Plaque-forming units and T antigen-forming units of SV40, SV40 deoxyribonucleic acid, or Adl2 were inactivated by ultraviolet (UV) irradiation at the same ra...

Hepatitis B surface antigen (HBs antigen) was examined for elicitation of IgE production by injection into mice. The Prausnitz-Küstner (PK)-type skin test in the rat was employed for detection of IgE antibody to HBs antigen, because no sufficient purified HBs antigen was available as the challenging antigen for the passive cutaneous anaphylaxis (PCA) test in rats. The positive PK test was consi...

Hemagglutinating and complement-fixing antigens of La Crosse virus (California arbovirus group) were produced in serum-free suspension cultures of BHK-21/13S cells. The appearance and production of these antigens were correlated with the titer of infectious virus. No significant differences in antigen titers were produced by varying virus dose 10-fold. Hemagglutinin appeared 6 to 8 hr after ino...

West Nile virus (WNV) envelope glycoproteins preM/E were stably expressed in baby hamster kidney cells and tested as antigen in a fluorescent antibody assay for WNV antibodies. Sera from horses, mice and chicken immunized with an inactivated WNV vaccine and, less consistently, sera from horses acutely infected with WNV, reacted specifically with viral antigens present in preM/E-expressing cells.

Abstract An expanding part of electron beam technology developed at Fraunhofer FEP tackles ecological and biotechnological challenges highest relevance. Antimicrobial fungicidal effects are exploited in the chemical-free phytosanitary treatment seeds. Chemical pollutants but also pathogens gaseous effluents waste water can be efficiently neutralized. Medical products such as tools, packaging im...