STBBI Basics: STIs



Chlamydia is a common sexually transmitted infection (STI) caused by the bacteria Chlamydia Trachomatis

Can infect others right after coming in contact with chlamydia

Can be spread to others without knowing it

Chlamydia in Canada


Chlamydia Transmission


Chlamydia Symptoms



Infection caused by a bacteria Treponema pallidum

Approximately 50% of individuals are asymptomatic

Incubation period of about 21 days

Syphilis in Canada


Syphilis Transmission


Syphilis Symptoms

Primary Stage:

Painless chancre(s) at site of the infection

Highly infectious phase

Chancre will last 3-6 weeks and heal without treatment, but infection is still present

Secondary Stage:

Rash occurring 2-8 weeks after chancre

Highly infectious phase

Rash usually heals within 2 months without treatment, but infection is still present

Latent Stage:

No symptoms for 1 – 20 years

Contagious during the early part of the latent stage even with no symptoms present

Relapse of Secondary Stage

20-30% of people may relapse to secondary stage during latent stage

Relapse can occur several times

After relapses end, no longer contagious via contact transmission, but can transmit congenital syphilis

Tertiary Stage

Destructive stage

Complications could include:

  • Gummata – large sores inside the body or on skin
  • Cardiovascular syphilis – affect hear and blood vessels
  • Neurosyphilis – affect nervous system


Sexually transmitted infection caused by bacteria called Neisseria gonorrhoeae

Any type of unprotected sexual contact (oral, vaginal, or anal sex without a condom)

Can infect others right after you come in contact with gonorrhea

Gonorrhea in Canada


Gonorrhea Symptoms