02 Apr 2019
Fluorescence imaging reveals that two different genomic segments of FBNSV (in green and red) occur in distinct host plant cells; the segments were localised by in situ hybridisation.

The secret multicellular lives of viruses

INRA, CIRAD, and CNRS researchers recently made an unprecedented discovery: the different genomic segments of a multipartite1 virus can occupy distinct cells within their host but still work together to generate infection. This finding challenges a key paradigm in virology, notably that a virus’s entire genome must enter a given cell and replicate therein before repeating the process in subsequent cells, thus causing infection. It is the first time that a virus has been shown to have a multicellular mode of existence, and this way of life may occur in other viruses as well. These findings should fuel novel research perspectives in virology.

10 May 2019
30 Apr 2019
Small ruminants in the Sahel. © Cirad, Sophie Molia

Acacia leaves to treat gastro-intestinal parasites in Sahelian sheep

Gastro-intestinal parasites are a major threat to small ruminants raised under field conditions. In the Sahel, livestock farmers have traditionally used medicinal plants such as acacia to manage parasite infections in sheep. Researchers at INERA+ and partner institutions++ have recently assessed the effectiveness of the leaves of local acacia species against these parasites. Their findings will be used to create sheep-feed recommendations for livestock farmers. The findings were published as a part of Geneviève Zabré’s doctoral thesis, presented on 12 June 2018.

  • Biofilm mixte de Lactococcus lactis (coques jaunes) et de Listeria monocytogenes (bâtonnets roses), observé en microscopie électronique à balayage.. © inra, Thierry MEYLHEUC
  • Supermarché. © MAITRE Christophe
  • Ciel d'orage en Eure et Loir.. © INRA, WEBER Jean
  • Floating market.. © INRA, Chloé Le Bastard
  • Céréales et tournesols fleuris sur fond de ciel.. © INRA, BEGUEY Alain