[Influenza surveillance in Tananarive during the year 1992]

The authors relate the 1992 results of influenza surveillance in Antananarivo. 24 influenza virus A (H3N2) strains were isolated from 467 pharyngeal swabs. The virus had been continually spreading from January to September, with a peak in July, along with some monthly sporadic isolations. The highest respiratory morbidity was observed in June and July. The collection processes of influenzal and respiratory morbidity statistics are also discussed in order to standardize data and to define the real impact of influenza and other acute affections of respiratory tracts on the population.