[Analysis of natural family planning failures. In 7007 cycles of use].

Materials And Methods: The analysis concerned 626 users using NFP in order to avoid a conception during a total of 6740 cycles. Participation in the study did not interfere with their plan of conception, and they were invited to behave, as far as possible, as though they ignored the study. Of these 626 couples, 530 were french, 61 belgian and 35 swiss.

Highly sensitive immunoassay for direct diagnosis of viral hemorrhagic septicemia which uses antinucleocapsid monoclonal antibodies.

An antigen capture enzyme-linked immunosorbent assay (ELISA) based on the detection of the viral nucleocapsid (anti-N system) was developed for the diagnosis of viral hemorrhagic septicemia. Four monoclonal antibodies directed against the viral nucleocapsid were produced; they all recognized the four viral hemorrhagic septicemia virus (VHSV) serotypes. Three of these monoclonal antibodies were used in a new antigen capture ELISA.