Microfilariae of Mansonella ozzardi, concentrated from human blood, frozen with a cryoprotectant chemical, and stored at liquid or vaporphase liquid nitrogen temperatures were motile when thawed after 2½ years of preservation.
PATOLOGIA TROPICAL • Acta Amaz. 13
(1)
• Feb 1983 • https://doi.org/10.1590/1809-43921983131095 copy