Skip directly to search Skip directly to A to Z list Skip directly to navigation Skip directly to page options Skip directly to site content
bannermenu

Case #460 - January, 2018

A 39 year-old man from Nigeria returned from visiting his country of birth with fever. A medical evaluation confirmed the fever and also detected low hemoglobin. A Binax-NOW rapid test for malaria showed a strong T1 band and a weak T2 band (Figure A). A blood smear was ordered and stained with Giemsa. Examination of a stained thin smear showed what is shown in Figures BI and the parasite density was calculated to be 0.5%. What is your diagnosis? Based on what criteria?

(This case and images were kindly provided by the Cadham Provincial Public Health Laboratory, Winnipeg, MB)

parasitic image

Figure A

parasitic image

Figure B

parasitic image

Figure C

parasitic image

Figure D

parasitic image

Figure E

parasitic image

Figure F

parasitic image

Figure G

parasitic image

Figure H

parasitic image

Figure I

Case Answer

This was a case of malaria caused by Plasmodium falciparum. Morphologic features shown included:

  • Infected red blood cells (rbcs) normal size.
  • Some ring stage parasites with delicate cytoplasm.
  • Older trophozoites compact and some with malarial pigment.
  • No other stages observed.

In addition to the morphologic features, PCR testing results also revealed that only Plasmodium falciparum was present.

More on Malaria: https://www.cdc.gov/dpdx/malaria/index.html

Images presented in the monthly case studies are from specimens submitted for diagnosis or archiving. On rare occasions, clinical histories given may be partly fictitious.

DPDx is an education resource designed for health professionals and laboratory scientists. For an overview including prevention and control visit www.cdc.gov/parasites/.

  • Page last reviewed: March 5, 2018
  • Page last updated: March 5, 2018
  • Content source:
  • Maintained By:
TOP