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Study Finds Common Toxoplasma Parasite Decapitates Human Sperm

Researchers caution that the damage’s impact on male fertility remains unclear despite its potential role in global sperm count declines.

Toxoplasma gondii cyst in brain tissue. (Representative image)
Toxoplasma Cyst

Overview

  • In lab tests, Toxoplasma gondii caused 22.4% of human sperm to lose their heads within five minutes of exposure and increased malformed cells over time.
  • Animal research shows the parasite reaches the testes and epididymis within days and forms dormant cysts in male reproductive tissues.
  • An estimated 30% to 50% of people worldwide carry Toxoplasma, which can remain in the body for life and reactivate to cause serious illness.
  • Global male infertility rates rose nearly 80% from 1990 to 2019, leading scientists to explore infectious factors alongside diet, obesity and environmental toxins.
  • Health experts recommend preventing toxoplasmosis by thoroughly cooking meat, washing fruits and vegetables and practicing careful hygiene around cat litter.