Cefaclor is used for treatment of infections caused by susceptible organisms including H influenzae and for treatment of otitis media, sinusitis, and infections involving the respiratory tract. It may not be appropriate in acute sinusitis, owing to less activity and the potential for severe allergic reactions.
nitrogen-fixing bacteria noun [pl]. âº biology âbacteria that can âabsorb nitrogen from the âair and âchange it into a âform that âplants can use for âfood. (Definition of nitrogen-fixing bacteria from the Cambridge Academic Content Dictionary Â© Cambridge University Press). See all translations.
1 Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation. The majority of nitrogen is fixed by bacteria, most of which are symbiotic with plants.  Recently fixed ammonia is then converted to biologically useful forms by specialized bacteria.