To deterimine the accuracy of the hair-perforation test for…

To deterimine the accuracy of the hair-perforation test for Trichophyton species, the clinical laboratory scientist used a known positive culture in parallel with the patient specimen. The culture dish of the control should contain baby hair plus which of the following?

A bone marrow aspiration performed on a 65-year-old female i…

A bone marrow aspiration performed on a 65-year-old female is 70% cellular with a 1.5:1 myeloid to erythroid ratio and 4% blasts. There are megaloblastoid changes in the erythrocytic precursors. Granulocyte precursors show hypogranularity and increased karyorrhexis. Vitamin B12 (cobalamin) and folic acid levels are within reference range. Which of the following findings correlates with the suspected diagnosis?  

After performing and AB screen and detection, you suspect th…

After performing and AB screen and detection, you suspect that the patient has and Anti-C. You counted 6 cells that had the C antigen that yielded an agglutination with the patient serum and 11 cells that did not have the C antigen that did not yield an agglutination. You tested 19 cells altogether. What is the p-value for the patient and is the identification valid based on the p-value?