Monday, March 11, 2024

Case of the Week 740

Welcome to our next filarial case by Idzi Potters and the Institute of Tropical Medicine, Antwerp. This week features the following lovely microfilariae seen in a Giemsa-stained thick blood film. They measure approximately 220 micrometers in length. Identification?


Anonymous said...

The pink sheath stained with Giemsa stain, the two terminal nuclei separate from the other nuclei help us differentiate the microfilarium from the other sheathed microfilaria, including its neighbor Brugyia timori. That leaves us with Brugyia malayi. The name does not limit the infection to Malaysia proper, but the organism can be found in neighboring countries as well.
Florida Fan

jebarnes said...

Has a sheath, so that leaves Loa loa, Wuchereria bancrofti and the Brugias. Based on size, Wuchereria bancrofti and Brugia timori are eliminated,leaving Loa loa and Brugia malayi. The sheath is bright pink with Giemsa, and there are terminal and sub terminal nuclei (doesn't go down to the tip of the tail in single file as we saw last week), so I am going with Brugia malayi.

Miles Markus said...

The filariasis cases are a wonderful idea!