Patients receiving lipid-supplemented parenteral nutrition are at risk for developing fungemia caused by which organism?
a. Histoplasma capsulatum
b. Malassezia furfur
c. Coccidioides immitis
d. Candida albicans
B
Fungemia, the presence of fungi in blood, is usually a serious condition, primarily occurring in patients who are immunosuppressed and in those with a serious or terminal illness. C. albicans is by far the most common species, but M. furfur can often be isolated in patients, particularly neo-nates, receiving lipid-supplemented parenteral nutrition.
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Which group of terms is in the correct developmental sequence?
(a) microspore mother cell, meiosis, megaspore, female gametophyte. (b) microspore mother cell, meiosis, microspore, pollen grain. (c) megaspore, mitosis, female gametophyte, meiosis, endosperm mother cell. (d) all of the above.
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a. How do new traits develop? b. How may the genetic changes contribute to evolution by natural selection? c. How can the degree of similarity in DNA or protein sequence be used to infer the degree of relatedness between species?
In an inflammatory response, the direct effect of histamine is to _______________
A. dilate blood vessels causing increased blood flow to the area of infection B. decrease heat accumulation in the area of infection C. directly kill bacteria D. attack cytotoxic T cells E. cause B cells to release antibodies
A child with no known congenital problems is diagnosed with inflammation of the heart valves. The medical history of the child is unremarkable except for a sore throat and fever six weeks prior, which the parents attributed to a common cold. The heart
valve inflammation is most likely due to A) atypical pneumonia. B) tuberculosis. C) Corynebacterium diphtheriae. D) Bordetella pertussis. E) autoimmune complications of Streptococcus pyogenes.