Bacterial pneumonia in children is most commonly caused by:
a. M. pneumoniae.
b. Chlamydia pneumonia.
c. parainfluenza virus.
d. Staphylococcus aureus.
D
Among previously healthy patients 2 months to 5 years of age, respiratory syncytial virus, human metapneumovirus, parainfluenza, influenza, and adenoviruses are the most common etiologic agents of lower respiratory tract disease. Children suffer less commonly from bacterial pneumo-nia, usually caused by H. influenzae, S. pneumoniae, or S. aureus.
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The immediate ancestors of plants were:
A. charophyceans B. red algae C. kelp D. cyanobacteria E. dinoflagellates with plastids
In ____ bonds, both atoms exert the same pull on shared electrons.
A. triple covalent B. polar covalent C. double covalent D. nonpolar covalent E. coordinate covalent
In the 1600s, William Harvey studied reproduction and development. What is the term given to the theory that states that an organism develops from the fertilized egg by a succession of developmental events that lead to an adult?
A) epigenesis B) equational transformation C) transduction D) preformation E) sequential pattern formation
The process of using a cleansing technique to mechanically remove and reduce microorganisms and debris to safe levels is
A. sterilization. B. sanitization. C. antisepsis. D. degermation. E. disinfection.