Human sperm

After only five minutes of direct contact between Toxoplasma gondii tachyzoites and sperms, 22.4% of spermatozoa were headless, compared with just 1.6% in controls. By 10 minutes, the proportion of headless sperm became fourfold relative to controls, and by 15 minutes, it had increased eightfold. Many sperm developed twisted, rolled, or shortened tails, impairing their motility