A patient had surgery for colorectal cancer, after which he received chemotherapy for 6 months. The test for carcinoembryonic antigen (CEA) was normal at thist time. One year later, the bimonthly CEA was elevated (above 10ng/mL). An examination and biopsy revealed the recurrance of a small tumor. What was the value of the CEA test results in this clinical situation? 

A physician orders 2 units of leukocyte reduced red blood cells. The patient is a 55-year-old male with anemia. He types as AB negative. There is only 1 AB unit on the shelf. What would be the next choice?

HDFN does not usually occur in the first pregnancy if the mother is D negative and the baby is D positive. Which of the following is the most likely reason for this?

In analyzing cardiac markers, which markers stays increased the longest?

An anitbiotic that inhibits cell wall synthesis is:

Eikenella corrodens is an oppotrunisitc pathogen, mostely  noted for causing abscesses of the oral cavity.

Which of the following is used to promote growth of gram-negative organisms while inhibiting the growth of gram-positive organisms? 

A yellow pigment producing organism that is oxidase positive, nonmotile, and does not grow on MacConkey agar is:

The porphyrin test was devised to detect strain of Haemophilus capable of:

The stock cultures needed for quality control testing deoxyribonuclease (DNAse) production are: