Hi there, I'm C. trachomatis.
I'm very small and sometimes called a parasite.
I move between cells as a tough 'elementary body', but once I'm inside I become an 'initial body'.
I really like hanging out in the eyes and genitals.
My disease chlamydia is the most common STI in the world!
It can become pelvic inflammatory disease and make women infertile.
I also cause lymphogranuloma venereum, a tropical STI.
I cause trachoma in your eyes, which slowly makes you blind.
I also cause conjunctivitis and pneumonia in babies.