Elderberry and Infectious Bronchitis Virus.. *Dr. Packs Summary #615. *"Sambucus Nigra Extracts Inhibit Infectious Bronchitis ... Conditions: Dengue fever, Hepatitis B, Hepatitis C, Herpes simplex virus, HIV, Infectious bronchitis virus infection., ... Avian infectious bronchitis virus (IBV), a coronavirus, causes respiratory infections and damages egg shells in chickens. ... dengue virus and human immunodeficiency virus.. One group of plant chemicals, catechins, can inhibit animal infectious agents. ...