What condition is most likely when P. fluorescens, P. putida, or P. stutzeri, Brevundimonas spp., and Ralstonia spp. are isolated from respiratory specimens?
a. Person-to-person transmission should be suspected.
b. Specimens come from immunocompetent individuals.
c. The isolated bacteria may not represent a significant pathogen.
d. The patient is in need of a lung transplant.
C
No known virulence factors have been associated with these organisms. Because of their low vi-rulence, whenever these species are encountered in clinical specimens, their significance should be highly suspect. These organisms may represent colonizers rather than true pathogens. When infections caused by these organisms occur, they usually involve a compromised patient exposed to contaminated medical materials. Such exposure has resulted in infections of the respiratory and urinary tracts, wounds, and bacteremia.
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Treponemal antibodies are those that are:
a. produced against antigens of the organ-isms themselves. b. produced by infected patients against components of mammalian cells. c. produced by the organism that causes the systemic destruction of the disease. d. also called reaginic antibodies.
The baroreceptors are located in the ____
a. adrenal glands b. brainstem c. heart d. erythrocytes e. walls of blood vessels
When infected by a parasite, an animal typically
A) grows more rapidly than a healthy individual. B) produces fewer offspring than a healthy individual. C) behaves less conspicuously than a healthy individual. D) is less likely to be preyed on than a healthy individual.
Why are there so many species of living things alive on earth now, more than at any time in earth's history?
What will be an ideal response?