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.
Although nitrogen is abundant in the atmosphere, a few species of microbes are the only organisms that can use it in this form. All other organisms depend on these bacteria. Certain bacteria produce enzymes that convert or fix gaseous nitrogen (N 2) into a form other organisms can use, such as ammonium (NH 4 +) or nitrate (NO 3-). Often nitrogen-fixing bacteria come to depend on plants for food, forming a symbiotic (or mutually beneficial) relationship.