[2] She works on the parasite Trichomonas vaginalis, which is responsible for trichomoniasis – one of the most prevalent sexually transmitted infections in the United States.
[5] After her PhD, Johnson was a postdoctoral researcher with Piet Borst at the Netherlands Cancer Institute.
[9] Johnson studies the molecular and cell biology of Trichomonas vaginalis, a parasite that causes trichomoniasis, one of the most prevalent sexually transmitted infections worldwide.
[10] Sequencing the genome revealed detailed information about the mechanism by which Trichomonas adheres to and kills human cells.
[13] Johnson studies different aspects of trichomonad biology,[14] including drug resistance, organelle biogenesis, gene expression, genomics and host-parasite interactions.
[11][15][16] In 2014 she found that Trichomonas vaginalis secreted a protein that can invade benign cancerous prostate cells.